Samsung Galaxy S II Skyrocket from AT&T is one of the most efficient android device from Samsung. This is purely a GSM phone. If you want to use Samsung Galaxy S 2 Skyrocket with any other GSm network, you need to unlock it first. Unlocking this phone is not so tough now. Unlocking the Samsung Galaxy S2 Skyrocket requires an unlock code. An Samsung Galaxy S II Skyrocket unlocked should work on any GSM phone networks or carrier....[Readmore]