upgraded to ios6.1 now my phone does not have network it shows No Service Im stuck without a phone
my phone is now without a service since upgrading to ios6.1
iPhone 4
Contact your Carrier...
However...
This usually happens if the phone has been Hacked / Jailbroken / Modified...
Unauthorized modification of iOS
http://support.apple.com/kb/HT3743
If this is the case...You will need to look elsewhere
Sorry... But...
The discussion of Jailbroken Devices is against the Terms of Use of this Forum.