Q: iphone 5 signal searching error after ugrade to ios7

Hello anand.mady,

Thanks for using Apple Support Communities.

For more information on this, take a look at:

iPhone: Troubleshooting activation issues

http://support.apple.com/kb/TS3424

1. Restart the iPhone.
2. Try another means of reaching the activation server and attempt to activate.
   • Try connecting to a known-good Wi-Fi network if you're unable to activate using a cellular data connection.
   • Try connecting to iTunes if you're unable to activate using Wi-Fi.
3. Restore the iPhone.

If you receive an alert message when you attempt to activate your iPhone, try to place the iPhone in recovery mode and perform a restore. If you're still unable to complete the setup assistant due to an activation error, contact Apple for assistance.

iPhone: Troubleshooting a cellular data connection

http://support.apple.com/kb/TS3780

1. Toggle airplane mode: Tap Settings, turn airplane mode on, wait three seconds, and then turn off again.
2. Restart your iPhone.
3. Ensure that your software is up to date:
   • Check for a Carrier Settings Update. Tap Settings > General > About.
   • Check for an iOS Software Update. Tap Settings > General > Software Update.
     Note: Some updates may require a Wi-Fi connection.
4. Remove the SIM Card and reinsert it. Allow the iPhone to acquire the network again.
5. If your SIM card has SIM PIN enabled, try toggling it off: Tap Settings > Phone > SIM PIN.
6. Try another location. If a different location works, but the original location still does not, contact your carrierto report the issue.
7. Reset network settings: Tap Settings > General > Reset > Reset Network Settings.

Best of luck,

Mario