iPhone 5s no service
After upgrading my iphone 5s to IOS 7.1 it now shows
'NO SERVICE "
What can I do without Jailbreaking the iphone
With your sim inside the phone and the device powered on try switching aeroplane mode on for 5 seconds and then back off and wait for a signal if doesn't work repeat the process again.
If that doesn't work the try another restore and if that doesn't work you need to run a report to see if the device is blocked.