@Rafa9 did you try restarting your phone or restarting your phone in safe mode? Some times after a software update you may need to restart your phone to restore network connection.. however a fast trick is to turn off the phone, remove the sim card, turn on the phone.. add the sim card, phone should restart automatically and then.. finding the network immediately.
If nothing above worked for you, try also this: go to Settings, More: Tap on "Network settings reset". IF that doesn't work.. try with tapping to Settings, More, Mobile Network and check if you can scan and select networks... if you can't... the issue could be your sim card or your device...
Try with a different sim card, if it works.. is your sim card, if it doesn't work.. concat your Local support to have your phone inspected.
