The Samsung Galaxy J3 Prime (also known as Galaxy J3 Emerge, Galaxy J3 Eclipse, Galaxy Express Prime 2, Galaxy Amp Prime 2, and Galaxy J3 Luna Pro) is an Android smartphone manufactured by Samsung Electronics and was released in January 2017. It is mainly used as branded phone by mobile carriers.

The Galaxy J3 Prime features a 5.0-inch TFT LCD with HD ready (720x1280 pixels) resolution. The 5 MP rear camera features f/1.9 aperture, autofocus, LED flash and HDR. The 2 MP front camera has f/2.2 aperture.

All models have 1.5 GB RAM and 16 GB of internal storage which can be upgraded up to 256 GB via microSD card. The phone has a 2600 mAh removable battery. There are differences at the SoC which are differentiated down below:

The Sprint-branded Galaxy J3 Emerge is powered by a Qualcomm Snapdragon 430 SoC including an octa-core 1.4 GHz ARM Cortex-A53 CPU and an Adreno 505 GPU.

The Galaxy Express Prime 2 (AT&T) and Galaxy J3 Prime (T-Mobile/MetroPCS) features an Exynos 7570 SoC including a quad-core 1.4 GHz Cortex-A53 CPU and an ARM Mali-T720 GPU.

The Galaxy J3 Eclipse (Verizon), Galaxy Amp Prime 2 (Cricket) and Galaxy J3 Emerge (Boost Mobile) are powered by an Snapdragon 425 SoC including a quad-core 1.4 GHz Cortex-A53 CPU and an Adreno 308 GPU.

The J3 Prime is shipped with Android 6.0 "Marshmallow" and Samsung's TouchWiz user interface. AT&T and Cricket branded phones are shipped with Android 7.0 "Nougat" and Samsung Experience.