The Samsung Galaxy S II Skyrocket HD has been unveiled at the AT&T Developer Summit. Not to be confused with the original Galaxy S II Skyrocket, the new HD model features a large 4.65-inch 1280×720 HD Super AMOLED touchscreen display. Heading to AT&T, the Skyrocket HD supports the carrier’s 4G LTE mobile network for high-speed data. The Galaxy S II Skyrocket HD is powered by 1.5GHz dual-core processor and runs Android 2.3. It features a 8 Megapixel auto focu camera with LED flash, and front-facing camera for video call. The phone 720p phone supports 1080p Full HD

Along with the HTC Vivid, AT&T is also introducing the Samsung Galaxy S II Skyrocket to its LTE 4G lineup. Boosted by a 1.5GHz dual-core processor, the Skyrocket runs Android 2.3.5 OS. It features a 4.5-inch Super AMOLED Plus 800×480 touchscreen display, a 8 Megapixel main camera with LED flash and 1080p Full HD video recording, 2 Megapixel front-facing camera and 16GB onboard memory.   The Galaxy S II Skyrocket supports AT&T’s LTE 4G network as well as 3G network. It also includes support for Bluetooth and WiFi connectivity. There is a microSD card slot for

Verizon Wireless is going to release Samsung’s Droid Charge SCH-i520 Android smartphone, which was first revealed back at the CES 2011. The new Samsung-made Droid phone supports Verizon’s 4G LTE network with download speeds of 5 to 12 Mbps and upload speeds of 2 to 5 Mbps in 4G Mobile Broadband coverage area. It is powered by a 1GHz processor and runs Android 2.2 OS with TouchWiz UI, Swype keyboard and Samsung Media Hub content service. The Samsung Droid Charge sports a 4.3-inch Super AMOLED Plus touchscreen, a 8 Megapixel rear camera with LED flash, a 1.3 Megapixel front

Verizon and Samsung Mobile announced at the CES 2011 the Samsung 4G LTE Smartphone (model SCH-i520) supporting Verizon’s LTE 4G network. The new 4G Android phone features a 4.3-inch Super AMOLED Plus touchscreen, a 8 Megapixel camera with LED flash and a 1.3 Megapixel front camera for video chat. It is powered by a 1GHz processor and runs Android 2.2 OS with TouchWiz 3.0 UI. Verizon and Samsung still haven’t given a name to the device and no words on availability. [samsung PDF]