Samsung announced back in August that it will be bringing the Galaxy Mega 6.3 to AT&T, Sprint and U.S. Cellular, but a specific release date wasn't mentioned. The Galaxy Mega 6.3 is currently available from AT&T and U.S. Cellular. Product image of the device with 4G LTE connectivity was leaked a few hours ago by non other than the infamous Evleaks. The press render indicates November 8 as the launch date. Evleaks has only leaked the picture of the Polaris White variant, but it will probably be available in both, Nova Black and Polaris White, colours.
Samsung Galaxy Mega 6.3 features a 6.3-inch 720p (720×1280) SuperClear LCD panel with a pixel density of 233ppi and packs a Dual-Core Snapdragon 400 SoC clocked at 1.7GHz, Adreno 305 GPU, 1.5GB RAM, 8 Megapixel main shooter capable of capturing videos in 1080p at 30FPS and a 1.9 Megapixel front facing camera sensor capable of shooting videos in 720p at 30FPS.
In terms of connectivity, the Galaxy Mega 6.3 offers WiFi 802.11ac support on top of the usual a/b/g/n, and an IR blaster is included for remote control access using Samsung's WatchON service. NFC, Bluetooth 4.0 + LE are included, and its got MHL 2.0 and is able to use a standard MHL connector. The device supports 4G LTE connectivity, as well.
Source: Evleaks (Google+)