When your Samsung Galaxy shows "not registered on network" error, it means your phone can't connect to your mobile carrier's ...

If you can't make a call or if you see an error message that your phone's SIM card is not working, there are several ways to ...

If you've ever called your carrier's customer service to activate a prepaid SIM card or troubleshoot a malfunctioning Android SIM card or iPhone SIM, then you've likely needed your ICCID number. The ...