Hello I have a factory unlocked 3GS with iOS 4.2.1 Baseband 05.15.04 which suddenly lost signal during the day and now shows no signal/searching all the time.
So thinking it was some software error I did a full restore of the phone and still the same thing is happening. The Baseband seems to be in a continuous reboot loop, as the Wifi keeps shutting down and comes back every few seconds, and the battery is draining really fast like twice as fast as normal,
but when I put the phone in airplane mode the wifi becomes stable again and the Baseband stops rebooting (the battery is still draining faster than normal even in airplane mode.)
Is my Baseband corrupt? Is there something I can do to fix it?