A friend asked me to fix his iphone 3gs. The iphone was stuck in the recovery mode. After trying everything I could, I made a restore through itunes to ios 5.1.1 using a custom ipsw file which preserved the baseband. After that the phone turned on as normally, there was the iphone setup , which needed to be completed, but after a couple of minutes the phone rebooted. And so it won't stay turned on for more than a couple of minutes. What should I do!!! Please help me as soon as possible! Thank you!
Restore it again and see if it work
I tried but to no avail!
Apparently the problem is that the owner tried to upgrade to 6.15 baseband and this iphone isn't compatible. Therefore it got bricked like this. It will continously reboot, the modem firmware is blank, no imei, no wifi, no gps, no bluetooth etc.
Restore it to 5.1.1 and it will work cuz the same thing happened to me before