Would you please help me figure out if & how unlocking my iPhone is possible? - 3GS - Softbank-locked (I still have the SIM) - iOS 6.1.2 (I did not save iOS 4 / 5 SHSH blobs when updating) - 16GB I want to unlock it so I can use it on a prepaid plan with a carrier in the U.S. Ideally I would like to have all the functions like data, call and text. Thanks!!!