If the "your phone is not registered on a network" error has popped up on your Android phone, you know how frustrating it can ...

To check if your Android phone is unlocked, try swapping in another SIM card or test your network settings. If calls work, ...

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 ...

These two ways of connecting your phone to a cellular network are very different. We tell you about each and how you can switch from one to another. I started my career with CNET all the way back in ...