Chosen Solution
My SIM use to work but then one day it say no SIM so I reset my phone and put my sim card back in there. I went to settings ,mobile network and scan, but then suddenly up comes SIM unavailable to networks. WHY? WHAT HAPPENED, AND WHAT CAN I DO?
Hi, Try another known working network compatible SIM card in your phone and see if it works in your phone. Try your SIM card in a known working network compatible phone and see if it works there. In other words swap your SIM card with another from a working phone and see where the problem is, the SIM card or the phone
