Today AT&T has announced two new devices from the South Korean tech giant. The first is the Galaxy J3, it has Samsung KNOX support and it will cost $5.67 a month with the Next 24 plan. More details are expected to be revealed early next month. The second device is exclusive to AT&T's pre-paid GoPhone service and is called the Galaxy Express Prime. This device has a 5" 720p display, Exynos 3475 SoC, 1.5GB RAM, 2600mAh battery, 5MP/2MP cameras, and 16GB storage with a microSD card slot for $130.