apple i phone 4s white 16Gb latest model .

iphone 4S, 16 Gbt, white, front and back sealed, locked to T- mobile network, comes with a new charger and headphone without box 8 mega pixle camera latest model please note: I just upgraded it to the latest version of IOS 5.1.1, but now shows T-mobile logo with full signal but can not make or receive calls but internet still work fine and everything else works fine still sealed like new