Hello All.... Everthing was working fine so far...Iphone4 , JB, 5.0.1 with BB 4.10.01. I dont know what i was doing, i tried to restore my iphone4 with downloaded isp, and my BB got changed to 4.11.08 and now looks like my gevey sim is not able to unlock.. Please please tell me . that i can downgrade my BB to 4.10.01. OR any other way to use gevey sim.. please help.. i am Tmobile customer, have Cut my sim..and i dont have any other phone.... Any help or suggestations are well appreciated..