Heres the issue, I purchased my friends old iphone 4 on 4.3.3 baseband 04.10.01 which is already jail-broken. My issue is all his info is still on there, i tried to reset all setting but the screen turns black and it spins for 1+ hour and does nothing until i master roboot and its back to his settings. How can i erase all his info and start from fresh? download 4.3.3 and manually restore to it? Also i have Tmobile so i need it to be unlocked aswell. Any help is greatly appreciated.