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Series 30+
Series 30+ interface displaying the Menu on a Nokia 8210 4G
DeveloperNokia (2013–2014)
Microsoft Mobile (2014–2016)
Human Mobile Devices (HMD) (2016-present)
OS familyMediaTek MAUI
Mocor RTOS (for devices with Spreadtrum/Unisoc SoC)
Initial releaseSeptember 2013; 12 years ago (2013-09)
Marketing targetFeature phones
Supported platformsMediaTek MT62 or Spreadtrum/Unisoc (specific SoC varies)
LicenseProprietary software
Preceded bySeries 30 and Series 40

Series 30+ (abbreviated as S30+) is a software platform and application user interface used for some Nokia-branded and HMD-branded mobile phones. It is the main software used for Nokia feature phones succeeding Series 30 and Series 40. Earlier Series 30+ devices following its inception in 2013 use MediaTek chips and are based on MAUI software, while most devices since 2020 (including all 4G phones) are developed on Unisoc chips and run the Series 30+ interface on top of Mocor RTOS.

Features

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Compatibility

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Many S30+ devices only support MAUI Runtime Environment (MRE) and its associated application file (.vxp)[1] developed by MediaTek,[2][3] but some later devices with MediaTek chips have included support for J2ME (Java) applications. More recent S30+ models are built on Mocor RTOS and are no longer compatible with MRE software.

Applications

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S30+ contain many of the basic mobile phone features. The devices also come preloaded Opera Mini web browser and a Facebook app client.[4]

Some S30+ based on MediaTek MAUI that support MRE applications (except Nokia 220) have an online shop for downloading new apps and games, and several S30+ devices that support J2ME applications, including a model of the Nokia 3310 3G, which ran the preceding Smart Feature OS shipped with access to Opera Mobile Store.[5] Currently, the S30+ online shop was not featured in some devices based on Mocor RTOS due to no longer compatible with MRE/J2ME software.

Generally, Series 30+ is more limited as opposed to KaiOS, an operating system that HMD ships with certain other of its feature phones.[6]

History

[edit]

Series 30+ was created for Nokia's new MediaTek based phones, having switched away from Base Band 5. It first appeared in September 2013 on the Nokia 108,[7] and has been the main Nokia feature phone operating system after the end of the Series 30 and Series 40 platforms in 2014.[clarification needed]

Menu displayed on a Nokia 222 (original S30+ design)
Menu Display on Nokia 105 2023 2G, TA-1557 with Cyan Variant

In October 2017, HMD Global released Nokia 3310 3G[8][9] which (instead of Series 30+) runs on Smart Feature OS, a platform based on Mocor RTOS developed by Unisoc. Before this, in 2015 three Microsoft-branded prototype phones: RM-1181, RM-1182 and RM-1183 were reportedly developed running a prototype version of Smart Feature OS. Photos that surfaced in 2018 showed a redesigned user interface, featuring elements of the Windows 10 Mobile design language and Microsoft Account integration.[10][11] Early Nokia 3310 3G units ran the same Smart Feature OS as the three Microsoft prototype phones, but featured a different user interface. This design language was later adopted by most Nokia-branded 4G phones running the successor Series 30+ platform, which is based on Mocor RTOS. This includes later models of the Nokia 3310 3G manufactured in 2019. Due to this, since 2018, Smart Feature OS name was later reused as a platform based on KaiOS, starting from Nokia 8110 4G.

Since late 2023, HMD has collaborated with CloudMosa to introduce various cloud-based widgets for feature phones using the Cloud Phone ("Cloud Apps For Feature Phone") technology.[12] This partnership marks the first time that Nokia Series 30+ devices are capable of accessing YouTube, Shorts, TikTok, Google Sign-in Services and real-time modern web applications. The first device to support Cloud Apps on Series 30+ is the Nokia 110 4G (2023), with all devices released in 2023 onwards set to feature this capability through OTA updates.[13] However, the Cloud Phone was not supported in Europe and China.

Since 24 April 2024, HMD launched four new 4G feature phones: Nokia 215 4G (Nokia 220 4G in China, India and Vietnam), 225 4G, 235 4G and Nokia 3210 (2024),[14] all supporting the Cloud Phone technology. The HMD 105, 110 and HMD Barbie Phone are the first three devices that use the brand name HMD, while The Boring Phone is the only device that never use the brand name Nokia or HMD, instead use the brand name Heineken. On their specification sheets, these phones drop the name S30+ in favor of the generic Mocor RTOS name.[15]

On 10 July 2025, a HMD-branded prototype touchscreen phone called HMD Wonka[16] that possiblity a revival of Nokia Asha series with the hardware design was similar to Nokia Lumia and HMD Skyline were reportedly developed running a modified version of Mocor RTOS for touchscreen devices. This device featuring several smartphone features, such as Wi-Fi support and have Wi-Fi hotspot, have built-in HMD Chat app, UPI payments app[17] and Cloud Phone technology[12] support,[14] and uses a different graphical user interface that very similar to Android instead of the UI that firstly used in Nokia 3310 3G. When this device officially comfirmed by HMD Global as HMD Touch 4G,[18] it had several changes compared to the prototype version, such as lock screen modified, renamed HMD Chat as Express Chat and reduced the numbers of embedded games (only Snake was still included).

Later, on 13 July 2025, another HMD-branded prototype touchscreen phone called HMD Compass[19] that possiblity a revival of Nokia Asha series like HMD Wonka, with the hardware design was similar to Nokia Asha 501 were reportedly developed running a modified version of Mocor RTOS for touchscreen devices. This device have several features similar to the HMD Wonka but also have several differents, such as different lock screen and featuring a app called GoPlay.

List of devices

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The following feature phones use the Series 30+ platform and are all available as both single and Dual SIM models.

Made by Nokia (2013–2014)

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  • Nokia 108 released in 2013 is a Series 30+ based device with support for camera, video, and Bluetooth technology.
  • Nokia 220 was released in 2014 with a 2.4-inch display and having Nokia Xpress browser and a GPRS data connection (2.5G).
  • Nokia 225, released in 2014, is similar to the 220 but has a larger 2.8-inch display.

Made by Microsoft (2014–2016)

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  • Nokia 130 is a smaller device with a 1.8-inch display, also released in 2014.[20]
  • Nokia 215 was announced in January 2015. Like the 220, the 215 has a 2.4-inch display, has GPRS – EDGE connectivity, and only has a VGA camera.[21]
  • Nokia 105 (2015) is a device announced in June 2015, is the 2nd edition of the Nokia 105 (2013) with Series 30, it notably had increased storage and could store over 2.000 contacts and last 35 days on standby, and is advertised as a backup telephone for smartphone users.[22]
  • Nokia 222 is a device announced in August 2015. The differentiation from its predecessors is that it comes with Skype's GroupMe application preinstalled,[23] supports J2ME applications.
  • Nokia 230 was launched in November 2015. This device features front-facing and main camera both with LED flash.[24]
  • Nokia 216 was announced in September 2016 and released in October 2016 (first released in India and Vietnam, later in the United Kingdom in January 2017). It is identical in features to the Nokia 215 with the main difference being the front-facing camera and a slight redesign.[25]

Made by HMD (2016-now)

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  • Nokia 150 was launched on 13 December 2016. It looks like a Nokia 216 but excludes a front camera and flash, uses a different processor, only has 6 ringtones in Tones, and has a matte finish around the keypad (as opposed to the glossy finish around the keypad on the Nokia 216). It still features Bluetooth but cannot access the internet.
  • Nokia 3310 (2017) in 2G was announced on 26 February 2017. This was the final Series 30+ device that support J2ME applications.
  • Nokia 105 (2017) was announced on 17 July 2017
  • Nokia 130 (2017) was announced on 17 July 2017
  • Nokia 106 (2018) was announced on 14 November 2018
  • Nokia 230 (2018), without J2ME games and apps support.
Nokia 105 (2019) running Series 30+

Since 2019, many Nokia S30+ models released with the Chinese Mocor RTOS platform (with some S30+ devices before 2021 bases on old MTK MAUI due to without 4G support):

  • Nokia 3310 3G (2019), the first Series 30+ device with Mocor RTOS, also as the first S30+ device featured 3G support. Several later Nokia 3310 3G devices (manufacturing in 2019) run Series 30+ instead of Smart Feature OS in 2017 version (although both were based on Mocor RTOS), with different pre-installed games and apps instead of downloadable J2ME games and apps in Smart Feature OS.[26]
  • Nokia 105 (2019) was announced on 24 July 2019
  • Nokia 210 (2019) was announced on 25 February 2019
  • Nokia 220 4G (2019) was announced on 24 July 2019, the second Series 30+ with Mocor RTOS that uses a graphical user interface similar to 2019 version of Nokia 3310 3G, but without animation. First S30+ device that featured 4G support.
  • Nokia 110 (2019) was announced on 5 September 2019
  • Nokia 5310 (2020) was announced on 19 March 2020.[27] This was the final Series 30+ based on old MTK MAUI software device, as well as the final device that support MRE applications.
  • Nokia 125 was announced on 12 May 2020[28]
  • Nokia 150 (2020) was announced on 12 May 2020[28]
  • Nokia 215 4G (2020) was announced on 10 October 2020 [29]
  • Nokia 225 4G (2020) was announced on 10 October 2020 [29]
  • Nokia 105 4G (2021) was released on 23 May 2021[30]
  • Nokia 6310 (2021) was announced on 26 July 2021[31]
  • Nokia 105 (2022) was announced on 26 March 2022 [32]
  • Nokia 110 (2022) was announced on 26 March 2022 [32]
  • Nokia 105 Plus (2022) on 26 April 2022 in India [33]
  • Nokia 8210 4G (2022)
  • Nokia 5710 XpressAudio (2022), which was the first phone featuring wireless Bluetooth earbuds.
  • Nokia 2660 Flip (2022), the first flip with Series 30+.
  • Nokia 105 Plus (2022) was announced on 1 December 2022 for China and India.

Since 2023, many S30+ devices released with IP52 water resistance, some models with IPS display, including:

  • Nokia 105 (2023) with IP52 water resistant.
  • Nokia 106 (2023) with IP52 water resistant.
  • Nokia 106 4G (2023) in India and Russia, with IP52 water resistance. In late 2023, users in India upgraded with the latest firmware via FOTA and added Cloud Phone technology[13] support.
  • Nokia 110 (2023) in India, with IP52 water resistant.
  • Nokia 130 Music, with IP52 water resistant
  • Nokia 125 (2023) in China, is a rebrand of the Nokia 130 Music, IP52 water resistant
  • Nokia 150 (2023) with IP52 water resistant
  • Nokia 105 4G (2023) with IPS display, IP52 water resistant.
  • Nokia 110 4G (2023) with IPS display, IP52 water resistant. In late 2023, users in India upgraded with the latest firmware via FOTA and added Cloud Phone technology[13] support.
  • Nokia 105 Pro 4G (2023), supports Micro-SD, IPS display, and IP52 water resistance.
  • Nokia 110 Pro 4G (2023), supports Micro-SD, IPS display, and IP52 water resistance.

Several S30+ phones since 2023 also featured built-in UPI payments app for Indian users only.[17]

Since 04/2024, many Series 30+ devices released with USB-C charging, including:

  • Nokia 5310 (2024), with a design similar to the Nokia 5310 (2020) but with a larger screen at 2.8" IPS (compared to the 2.4-inch TFT of the 2020 version), and supports USB-C.[34]
  • Nokia 6310 (2024), with a design similar to the Nokia 6310 (2021), 2.8" IPS display, supports USB-C.[34]
  • Nokia 230 (2024), with a metal design similar to the Nokia 230 but with additional metal accents surrounding the external speaker, flash LED, and camera, and supports USB-C charging.[34]
  • The Boring Phone (2024), in cooperation with Heineken and Bodega, is based on the Nokia 2660 Flip, with a monochrome screen and fewer features.[35]
  • Nokia 225 4G (2024) with new design language featuring flat edges surrounding the body, IPS display and USB-C charging, and a VGA camera, featuring Cloud Phone technology[12] support.[14]
  • Nokia 220 4G (2024) in China, India and Vietnam, with a design similar to Nokia 225 4G (2024) but without a camera, larger screen 2.8" IPS and USB-C charging.[36] The Indian and Vietnamese version also featuring Cloud Phone technology[12] support.[14]
  • Nokia 215 4G (2024), is a rebrand of the Nokia 220 4G 2024 in China but with a global market, featuring Cloud Phone technology[12] support.[14]
  • Nokia 235 4G (2024), with a design similar to Nokia 225 4G (2024) but with a 2MP camera, IPS display, and USB-C, featuring Cloud Phone technology[12]support.[14]
  • Nokia 3210 (2024),[37] with flat design, 2MP camera, IPS display, USB-C, featuring Cloud Phone technology[12]support.[14]
  • HMD 105 (2024), one of the first two Series 30+ devices that use HMD brand name.[38]
  • HMD 110 (2024), one of the first two Series 30+ devices that use HMD brand name.[39]
  • HMD Barbie™ Phone (2024) in Europe and China, in cooperation with Mattel, is based on the Nokia 2660 Flip, with Barbie's theme design and features.[40] The US version of this phone is based on the Nokia 2780 Flip and run KaiOS instead of Mocor RTOS, but uses the similar user interface from the Mocor RTOS version.
  • HMD 105 4G (2024), 4G version of HMD 105 (2024) for many countries that no longer support 2G, featuring Cloud Phone technology[12]support.[14]
  • HMD 110 4G (2024), 4G version of HMD 110 (2024) for many countries that no longer support 2G, featuring Cloud Phone technology[12]support.[14] Also have Nokia logo variant.[41]
  • Nokia 108 (2024), is a rebrand of the HMD 105 (2024).
  • Nokia 108 4G (2024), is a rebrand of the HMD 105 4G (2024), featuring Cloud Phone technology[12]support.[14]
  • Nokia 125 (2025), is a rebrand of the HMD 110 (2024).
  • Nokia 125 4G (2024), is a rebrand of the HMD 110 4G (2024), featuring Cloud Phone technology[12]support.[14]
  • HMD 150 Music (2025), rebranded version of Nokia 150.
  • HMD 130 Music (2025), rebranded version of Nokia 130 Music/Nokia 125.
  • HMD 2660 Flip (2025), rebranded version of Nokia 2660 Flip, featuring Cloud Phone technology[12] support.[14]
  • HMD Barça 3210 (2025), in cooperation with FC Barcelona, is based on the Nokia 3210 (2024), with FC Barcelona's theme design and features.
  • HMD 101 4G (2025), featuring Cloud Phone technology[12]support.[14]
  • HMD 102 4G (2025), featuring Cloud Phone technology[12]support.[14]
  • HMD Touch 4G (2025), the first touchscreen device with Series 30+.[18] Compared to other S30+ devices, it featuring several smartphone features such as Wi-Fi, Wi-Fi hotspot, built-in Express Chat app, and Cloud Phone technology[12]support.[14] As a side note, the prototype version of this device was called as HMD Wonka.[16]

Several S30+ phones since 2025 also featured built-in DeepSeek chatbot app for Chinese users only.[42]

Multimedia support

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Maximum accepted video resolution is 854×480.[citation needed]

See also

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References

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Revisions and contributorsEdit on WikipediaRead on Wikipedia

Series 30+

View on Grokipedia
from Grokipedia
Series 30+ (also known as S30+) is a proprietary software platform and user interface developed for entry-level Nokia feature phones, emphasizing basic telephony, messaging, and multimedia functions such as FM radio listening and simple games like Snake, while running on low-power hardware to ensure long battery life. It powers devices targeted at emerging markets and users seeking affordable, durable mobiles without smartphone complexities. Introduced in 2013 by with the Nokia 108, succeeding the original Series 30 platform, it continued under following the April 2014 acquisition of Nokia's Devices and Services business and was utilized in ultra-low-cost handsets like the Nokia 130 and to maintain presence in budget segments. The operating system supports networks, microSD card expansion for media storage, and in some models, connectivity for audio sharing, but lacks native support for advanced features like full web browsing or third-party app installations in its core versions. Later iterations, such as those in the 2017 remake, incorporated enhanced multimedia players and preloaded games from partners like , while retaining the platform's simplicity. Under HMD Global's licensing of the Nokia brand since 2016, Series 30+ continued to evolve for modern basic phones, including 4G-capable variants like the Nokia 225 4G, with updates focusing on improved standby times—up to a month in some models—and compatibility with regional networks. The platform is built on efficient, closed-source architecture derived from components, enabling developers to create C/C++-based applications through specialized tools, though widespread app development remains limited compared to more open systems. Notable devices running Series 30+ include the Nokia 105 (multiple generations), Nokia 110, Nokia 130 (up to 2023 edition), and (2024), highlighting its ongoing role in providing reliable, no-frills mobile communication as of 2025.

Overview

Platform Fundamentals

Series 30+ is a platform developed by for entry-level feature phones, serving as a successor to the Series 30 platform by incorporating support for modern connectivity while retaining core basic UI elements. The platform is a closed-source operating system variant built on a (RTOS), paired with low-power chipsets such as the MT6260 series to enable efficient operation in resource-constrained devices. Its core architecture employs a with minimal multitasking, tailored for seamless integration with , , and modems, and eschews full-fledged application ecosystems in favor of lightweight native functionality. In contrast to smartphone operating systems, Series 30+ provides no support for third-party applications, MIDP environments, or advanced web rendering capabilities, relying exclusively on pre-compiled native binaries for all operations. The platform debuted in September 2013 with the 108 as its inaugural device.

Target Market and Positioning

The Series 30+ platform primarily targets budget-conscious consumers in developing regions, including , , and , where economic constraints make affordability and device durability more critical than advanced smart functionalities. , the licensee for Nokia-branded devices, has emphasized this focus by achieving a dominant 22.4% by volume in India's feature phone segment, the world's second-largest such market. Similarly, the platform appeals to users in , where feature phones maintain broad adoption due to their reliability in low-connectivity environments. Positioned as a contemporary "dumbphone" alternative, Series 30+ prioritizes essential utility through extended battery life—reaching up to 30 days of standby on models like the Nokia 105—rugged builds with IP52 dust and water resistance on devices such as the Nokia 130, and straightforward support for voice calls and messaging. This strategy caters to users seeking dependable, low-maintenance devices without the complexities of app ecosystems or data-heavy features, reinforcing Nokia's legacy of robust hardware in resource-limited settings. In terms of market impact, Series 30+ has bolstered HMD Global's revenue, with the company reporting sales of 2 million units in during a single month and overall growth defying a declining global feature phone market. These sales have sustained Nokia's viability in the segment post the industry's smartphone transition, enabling HMD to capture share in high-volume emerging markets. Series 30+ differentiates itself in the competitive landscape from semi-smart platforms like , which powers devices such as the JioPhone and includes app stores for basic services, by deliberately omitting such features to emphasize simplicity, lower hardware costs, and maximal reliability for core communication needs. This focus allows it to undercut rivals on price while appealing to users uninterested in transitional "smart feature" capabilities.

History

Introduction and Early Development

Series 30+ was developed by as a lightweight evolution of the earlier Series 30 platform for entry-level feature phones, incorporating connectivity and basic multimedia capabilities such as VGA cameras and playback, amid the company's strategic pivot from the operating system toward for its higher-end devices in the early 2010s. The platform's key milestones included its development as part of Nokia's innovations, with initial devices using system-on-chips for cost efficiency. It made its public debut with the Nokia 108 and Nokia 108 , announced on September 16, 2013, and released in October of that year. Design goals for Series 30+ emphasized reducing manufacturing costs to under $30 per unit for retail pricing, enabling support for color LCD displays up to 1.8 inches in initial models like the Nokia 108, and standard integration of FM radio for accessibility in emerging markets. Early development faced challenges in balancing new feature additions, such as microSD card slots supporting up to 32 GB of expandable storage, without substantially increasing power draw; the Nokia 108, for instance, achieved this with a 950 mAh battery offering up to 31 days of standby time (single SIM).

Transitions Across Manufacturers

In 2014, acquired 's Devices and Services business, including its division, for €5.44 billion, marking a significant transition for the Series 30+ platform. Although the acquisition aimed to bolster 's mobile ecosystem around , Series 30+ was preserved for low-end s targeting emerging markets, separate from the Lumia smartphone lineup. The first device released under 's branding was the Nokia 130, announced in August 2014 and released in September 2014, which ran Series 30+ and emphasized basic connectivity and long battery life. During Microsoft's tenure from 2014 to 2016, development of Series 30+ devices shifted toward cost efficiency amid broader restructuring efforts, including substantial layoffs in the mobile division. Resources were primarily directed to the Lumia series and integration, resulting in limited new feature phone releases—such as the updated and Nokia 216. This prioritization reflected Microsoft's strategic focus on smartphones over basic handsets, culminating in the shutdown of and the sale of the feature phone business in May 2016 for $350 million to FIH Mobile (a subsidiary) and , which secured a 10-year licensing agreement for the brand. Under HMD Global's stewardship starting in 2017, Series 30+ experienced a revival through nostalgic reimaginings and modern upgrades, beginning with the reboot announced at . This licensing deal enabled HMD to emphasize affordability, durability, and cultural appeal, leading to the release of over 50 models by 2025, including 4G-enabled variants like the Nokia 235 4G and Nokia 225 4G in 2024. Strategic innovations included integrated earbud charging in models such as the Nokia 5710 XpressAudio (2022), which featured a built-in case for true audio accessories, and clamshell flip designs like the Nokia 2660 Flip (2022), catering to users seeking accessible interfaces for calls and texts. These evolutions positioned Series 30+ as a bridge between legacy simplicity and contemporary connectivity needs in developing regions.

Core Features

User Interface Elements

The Series 30+ emphasizes simplicity and ease of use for entry-level mobile phones, featuring an icon-based menu system navigated via a standard and a five-way directional pad () for scrolling through options and selecting items. This design allows users to access core functions like calls, messages, and settings without complex gestures, making it suitable for non-smartphone users who prefer physical buttons over touch input. The interface supports displays ranging from to 65,000-color themes, enabling basic visual customization that adapts to the hardware capabilities of compatible devices. Menus can be configured in either grid or list layouts, providing flexibility for organizing icons and improving navigation efficiency on small screens. Navigation is enhanced by dedicated buttons, including left and right soft keys for contextual menus, a central select button, and call/end keys positioned below the , which together facilitate quick movement through hierarchical menus. Predictive text input via the T9 system is integrated for composing messages and notes, reducing the number of key presses needed on the by suggesting words based on key sequences. Users can personalize the standby screen with customizable wallpapers drawn from preloaded images or files stored on a microSD card, adding a touch of individuality while maintaining the platform's lightweight footprint. Accessibility features in Series 30+ include vibration feedback for incoming calls and alerts, helping users in noisy environments or those with hearing impairments, as well as options to adjust font sizes for better on low-resolution displays. While high-contrast modes are not explicitly detailed in early implementations, the platform's straightforward button-based interaction inherently supports users with limited dexterity by avoiding touch precision requirements. These elements ensure the UI remains approachable for a broad audience, including older users or those transitioning from basic phones. In post-2017 versions produced by HMD Global, the Series 30+ UI saw refinements such as smoother menu animations and boot sequences for a more polished experience, alongside the addition of USB mass storage mode to simplify file transfers from microSD cards to computers. These updates built on the core design without introducing complexity, preserving compatibility with built-in applications like the FM radio and Snake game while improving overall responsiveness.

Built-in Applications

The Series 30+ platform features a suite of native utilities designed for essential daily tasks, emphasizing simplicity and resource efficiency on entry-level feature phones. Core entertainment includes updated variants of the iconic Snake game, which remains a staple for casual play and evokes the legacy of Nokia's early mobile gaming. A basic calculator supports standard arithmetic operations such as addition, subtraction, multiplication, and division, suitable for quick computations without advanced functions. Productivity tools encompass a for viewing monthly layouts and setting reminders for events, allowing users to add notes and mark important dates. The alarm clock enables setting multiple alarms with customizable repeat options and includes a and for timing activities, all integrated into the clock application for straightforward . Communication functionalities feature an composer limited to 160 characters per message in line with standards, facilitating text-based exchanges without support for multimedia messaging in basic configurations. The contact manager stores up to 2,000 entries, including names, numbers, and basic details, with options to search, edit, and favorites. Additional utilities provide practical support, such as a for displaying multiple time zones to aid international coordination, though availability varies by model. A unit converter handles basic transformations for and , promoting utility for travelers or everyday measurements on supported devices. The voice recorder captures audio clips, ideal for notes or memos. These applications operate in single-task mode, closing upon exit to prioritize battery conservation, and lack advanced features like an or to maintain the platform's lightweight profile. Access to apps occurs through the main menu, navigated via the central scroll key for intuitive selection.

Hardware Compatibility

Display and Input Support

Series 30+ devices primarily utilize panels for their displays, with screen sizes ranging from 1.8 inches to 2.8 inches to balance portability and visibility in entry-level feature phones. The maximum resolution supported is QVGA at 320 x 240 pixels, enabling clear rendering of simple icons, text, and basic graphics without taxing the platform's limited resources. These panels typically achieve brightness levels up to 300 nits, sufficient for outdoor readability in typical ambient lighting conditions. Input on Series 30+ handsets relies exclusively on physical controls, eschewing touch interfaces to maintain simplicity and durability for basic users. The standard configuration features a 12-key with dedicated buttons for navigation, call functions, and soft key operations, often covered in rubberized material for tactile feedback. Soft keys provide contextual access, all optimized for the platform's icon-based rendering. Hardware compatibility in Series 30+ emphasizes essential connectivity without advanced features. Devices universally support microUSB 2.0 ports for charging and limited data transfer, ensuring broad accessory interoperability. A 3.5 mm headset jack is standard for wired audio output, facilitating FM radio listening and basic call audio. Display variations across Series 30+ reflect evolving design priorities over time. Color TFT became predominant by mid-decade. In later iterations under from 2020 onward, flip-style devices like the Nokia 2660 Flip use flat TFT displays in compact form factors.

Processor and Memory Integration

The Series 30+ platform relies on efficient, low-cost System-on-Chip (SoC) designs from and to power its entry-level feature phones, emphasizing minimal power consumption and basic processing capabilities suitable for voice calls, messaging, and simple applications. Early implementations, particularly in Nokia's 2013–2014 models like the Nokia 105, utilized the MT6261 SoC, which features a single-core ARM7EJ-S processor operating at 260 MHz. This chipset supports connectivity and integrates essential peripherals such as a modem and display controller directly on the die, reducing overall hardware complexity. In later HMD Global-era devices from 2017 onward, especially variants such as the 105 (2021) and Nokia 110 , chipsets like the T107 became prevalent, offering a single-core processor for enhanced network support while maintaining compatibility with the lightweight Series 30+ software stack. These SoCs operate at clock speeds around 1 GHz, providing sufficient performance for VoLTE calls and basic multimedia without exceeding the thermal limits of compact designs. Clock speeds across the platform generally range from 260 MHz in models to higher frequencies in configurations, balancing efficiency with functionality. Memory configurations in Series 30+ devices are optimized for constrained environments, typically featuring 4–16 MB of RAM for runtime operations and 4–32 MB of ROM dedicated to the OS and pre-installed applications. For instance, the MT6261 includes 4 MB of embedded RAM, while T107-based models like the 110 provide 48 MB RAM and 128 MB ROM, though effective usable space remains limited to support the platform's minimalistic apps. Recent 2023–2025 models, such as the 130 (2023) and 110 (2024), feature configurations like 4 MB RAM/4 MB ROM and 64 MB RAM/128 MB ROM, respectively. Storage expansion is universally supported via microSD cards, with capacities up to 32 GB in most models, allowing users to store additional media files without impacting core performance. Power management is integrated into the SoCs via dedicated PMICs, tailored for removable batteries of 1000– mAh capacity, which enable exceptional longevity in low-usage scenarios. Sleep modes and aggressive idling optimize use, achieving standby times of up to 840 hours (35 days) in models like the Nokia 105, far surpassing modern smartphones due to the absence of power-hungry components like high-resolution displays or always-on connectivity. These systems prioritize states and efficient operation to extend battery life in resource-limited hardware. Integration challenges arise from the platform's emphasis on , as these SoCs lack a dedicated GPU, relying instead on CPU-based rendering for the simple graphical elements of the Series 30+ UI, such as icons and text menus. This approach suffices for or low-color displays but limits advanced visuals. Additionally, the casings common in these devices, while lightweight and durable, necessitate software-level throttling during prolonged tasks like FM radio playback to mitigate minor heat buildup from the integrated components.

Multimedia Capabilities

Audio Playback and Radio

The Series 30+ platform supports audio playback of common formats including , , AAC, and , enabling users to enjoy music stored on the device or microSD card via a built-in media player. Polyphonic ringtones enhance notifications with multi-layered sounds, providing a more engaging auditory experience on these basic devices. An integrated FM radio tuner is a standard feature across Series 30+ devices, allowing reception in the 76–108 MHz band with the wired headset functioning as the antenna. Select models incorporate (RDS) support for displaying station names and program information, while some offer the ability to record live broadcasts directly to memory. Audio output options include a 3.5mm headphone jack for wired listening and a built-in speaker for hands-free playback and calls. Call audio benefits from basic processing through a single to reduce echo. Under HMD Global's production from 2017 onward, audio enhancements appeared in models like the 2022 Nokia 5710 XpressAudio, which bundles earbuds offering a 10m range for convenient and radio listening without additional accessories.

Video and Camera Features

Series 30+ devices incorporate basic camera hardware, typically featuring VGA (0.3 MP) sensors in entry-level models and up to 2 MP sensors in mid-tier variants such as the 230 and . These cameras employ fixed-focus lenses, with LED flash present in select models but not as a standard across the platform. As of , camera resolutions remain limited to up to 2 MP with no significant advancements. Video recording capabilities are limited to low resolutions, with basic models supporting QCIF (176x144) at a maximum of 15 fps and higher-end ones reaching 320x240 at the same ; supported formats include 3GP, while clip durations are constrained to 1–5 minutes based on the device's limited internal memory. For playback, the platform handles 3GP and MP4 files up to 320x240 resolution through software-based decoding, lacking dedicated for smoother performance. This visual media support integrates with audio features for simple video clips, but remains focused on fundamental capture and viewing without advanced processing. Throughout its development, Series 30+ has shown minimal evolution in camera and video features, with no support for 1080p recording, optical image stabilization, or higher frame rates; HMD Global's updates for models like the Nokia 3210 (2024) have not introduced advanced editing tools.

Device Catalog

Nokia Production (2013–2014)

The Nokia 108, released in September 2013, was an entry-level feature phone designed for emerging markets, featuring a compact 1.8-inch color display with 128x160 pixel resolution, a VGA camera for basic photography, an FM radio, and the classic Snake game. Weighing approximately 70 grams, it offered up to 31 days of standby time on its 950 mAh removable battery, making it suitable for users seeking long-lasting basic connectivity without advanced features. A dual SIM variant of the Nokia 108 was introduced alongside the single SIM model, providing an additional SIM slot under the battery for enhanced flexibility in regions with multiple network providers, while retaining the same core specifications including the 1.8-inch display, VGA camera, FM radio, and Snake game. This version targeted cost-conscious consumers in developing economies, with a recommended retail price of around 29 USD excluding taxes and subsidies. In 2014, Nokia launched the Nokia 130 as an ultra-affordable music-focused device, equipped with a 1.8-inch TFT display (128x160 pixels), an player supporting expandable storage via microSD card up to 32 GB, 3.0 for wireless audio sharing, and an FM radio. Powered by a 1020 mAh battery, it provided up to 26 days of standby time and was available in single and configurations, emphasizing durability and simplicity for basic communication and entertainment needs. The Nokia 220, announced in February 2014, marked an advancement in the lineup with its 2.4-inch color TFT display (240x320 pixels), introducing basic internet access through the browser with proxy-based text rendering for efficient data use on networks. It included a 2-megapixel camera, support for microSD cards up to 32 GB, FM radio, and 3.0, while its 1100 mAh battery offered up to 15 hours of talk time, positioning it as an accessible entry point to web connectivity for first-time users. These devices were built on chipsets, such as the MT6260 series, enabling cost-effective production for global distribution in emerging markets. Nokia's shipments during this period contributed significantly to the company's overall volume, with millions of units distributed to support basic and in price-sensitive regions.

Microsoft Mobile Production (2014–2016)

Following the acquisition of Nokia's Devices and Services business in April 2014, Microsoft Mobile continued production of entry-level feature phones under the Nokia brand, utilizing the Series 30+ platform to target emerging markets with affordable, durable devices emphasizing basic connectivity and media playback. These models represented transitional updates to pre-acquisition designs, incorporating minor enhancements like expanded storage options and initial internet access features while maintaining the platform's focus on long battery life and simplicity. Production remained limited, with over 10 models released between 2014 and 2016, as Microsoft shifted emphasis toward integrating elements from the higher-end Asha series, such as improved sharing capabilities, before divesting the feature phone division in 2016. The Nokia 130 Dual SIM, announced in August 2014, served as an early example of Microsoft Mobile's approach, offering expanded storage via a microSD slot supporting up to 32 GB for media files, which catered to music-focused users in regions with limited data access. Priced at approximately €19, it included a built-in MP3 player capable of up to 46 hours of continuous playback and an FM radio, enhancing its appeal for offline entertainment without advanced multimedia hardware. Available in single- and dual-SIM variants, the device weighed 127.8 g and featured a 1.8-inch QVGA display, prioritizing portability and a standby time of up to 30 days. In January 2015, introduced the 215, its first Series 30+ device with basic browsing via the pre-installed browser, which used a Microsoft proxy for data compression to enable access on networks. Targeted at first-time users, it weighed 110 g and featured a 1.8-inch display, along with built-in apps for , Messenger, , and Weather, while offering up to 29 days of standby time on a single charge. The dual-SIM model supported up to 20 hours of talk time, positioning it as an affordable entry point to digital services at around $29. The 225, released in mid-2014 shortly after the acquisition, introduced a selfie flash variant leveraging its LED light for front-facing , paired with a 2.4-inch TFT screen that improved and visibility. Weighing 124.5 g, it supported Bluetooth sharing through Nokia's Slam technology, allowing quick transfer of photos and videos to nearby devices without pairing. Available in single- and dual-SIM configurations, the phone emphasized social connectivity with a 0.3 MP camera and up to 24 days of standby, priced at about €49. Microsoft's final major Series 30+ release under its tenure was the Nokia 222 in August 2015, a dual-SIM model with an integrated player for stored media files, supporting microSD expansion up to 32 GB. Featuring a 2.4-inch display and 0.3 MP camera, it weighed 101.1 g and included basic equalizer adjustments in the music interface for customized playback. With internet access via and apps like and , it offered up to 29 days of standby and was positioned as a versatile media and communication tool at $37. This device marked the culmination of Microsoft Mobile's feature phone efforts before the 2016 handover to .

HMD Global Production (2017–2025)

HMD Global, having acquired the rights to produce Nokia-branded devices in 2016, revitalized the Series 30+ platform with a focus on nostalgic revivals and modern upgrades tailored for emerging markets and users seeking durable, affordable phones. The company's production emphasized basic functionality, long battery life, and gradual integration of 4G connectivity, while maintaining the simplicity of the S30+ operating system. From 2017 onward, HMD released a diverse lineup of bar, flip, and music-oriented models, often drawing on iconic designs from Nokia's past to appeal to sentimentality and practicality. The Nokia 3310 (2017) marked HMD's nostalgic reboot of the legendary model, featuring a 2.4-inch QVGA color display, FM radio, and a 1200 mAh removable battery offering up to 22 hours of talk time. This candy bar phone supported 2G networks and included Snake and other classic games, positioning it as an entry-level device for basic calling and messaging. HMD continued expanding the catalog with feature-rich variants in the early 2020s. The Nokia 8210 4G (2022) echoed the classic bar design with a removable 1450 mAh battery, 2.8-inch display, 4G connectivity, FM radio, and USB-C charging for modern convenience. The Nokia 5710 XpressAudio (2022) stood out as a music-focused bar phone with dedicated rear audio keys, built-in wireless earbuds, a 1450 mAh battery, and Bluetooth 5.0, supporting MP3 playback and FM radio. Also in 2022, the Nokia 2660 Flip offered a compact clamshell with 4G, a 2.8-inch display, and assistance buttons for accessibility, backed by a 1450 mAh battery. By 2024, HMD prioritized 4G standardization and contemporary ports across its releases. The Nokia 235 4G featured a 2.8-inch display, USB-C charging, FM radio, and a 1450 mAh removable battery, emphasizing affordability and durability. The Nokia 225 4G (2024) updated the bar phone with an enhanced Snake game, 2.4-inch display, 4G VoLTE, and FM radio supporting up to 200 contacts. Ultra-basic options included the Nokia 110 4G with a 1.8-inch display and 1000 mAh battery for essential calling, and the Nokia 105 4G (2nd Edition), released in December 2024, offering a refreshed 1.8-inch screen, 1450 mAh battery with up to 18 days standby, and dustproof design. The Nokia 6310 (2024) revived the bar form with 4G, a 2.8-inch display, and long battery life, while the Nokia 5310 (2024) incorporated dedicated music control keys, 4G, and a 1450 mAh battery for audio enthusiasts. Additional 2024 releases included the Nokia 125 4G, a basic model with 2.4-inch QVGA display, 1450 mAh battery, FM radio, and Snake game. In 2024, HMD introduced the 108 4G refresh, a compact bar phone with a 2.0-inch QVGA display, 1450 mAh removable battery, , IP52 dust/water resistance, and connectivity for HD calling and basic multimedia. Overall, HMD's output under the brand surpassed dozens of Series 30+ models, making a standard feature by the mid-2020s. Production trends shifted toward , incorporating recycled materials for durability and reducing environmental impact, alongside extended software support of 2-3 years for security updates on select devices.

References

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