On several occasions since the switch over to Sunrise from UPC , my SIM in the phone is being locked and unable to make any calls.
I checked in the phone with the Settings About to verify that there is the message saying “No SIM restrictions” for the Sunrise carrier.
So I do a shutdown on the phone and restart the phone and the SIM becomes unlocked and after applying my pin code I am able to make calls again.
Any ideas as to why this may be happening, as I never had this trouble whilst with UPC my original carrier
Regards