keeps restarting every 3 min and no texts or calls
My iphone 3GS ios5.0.1 has been giving me alot of trouble. I need to restore it every few days in order to make it work.
After the restoring the phone works perfect. A few days later it starts to restart every 3-4 minutes. I can't make any calls or send any text messages. I have tried disabling wi fi, airplane mode, installing with no apps, restore as new, etc. What could it be?