Unlocked Samsung Galaxy J3 (2016) now available via Amazon, can be used on T-Mobile and AT&T
The Galaxy J3 (2016) that can be purchased via Amazon costs $189.99, so it's a tad cheaper than the Sprint version ($192). The device is compatible with the networks of AT&T and T-Mobile (LTE included), and you can get it in black (dual SIM), white (dual SIM), or gold (single SIM) - check out the source links at the end of this article.
As you'd imagine seeing its price, the Samsung Galaxy J3 (2016) is no high-end phone. It's a 5-inch (720p Super AMOLED) handset that's powered by a quad-core Snapdragon 410 processor aided by 1.5 GB of RAM. It's also got an 8 MP rear camera, a 5 MP front-facing camera, 8 GB of expandable storage space, and a 2600 mAh battery. At the moment, the J3 runs Android 5.1 Lollipop, and we're not sure if it's going to be updated to Android 6.0 Marshmallow.
AT&T will also sell a GSM/LTE variant of the Samsung Galaxy J3 (2016), but only starting May 6.
source: Amazon (Galaxy J3 in white, black, gold)