Apple says the issue may stem from having an inactive SIM with the same number as your active SIM. To fix it, remove the inactive SIM and activate iMessage again.

Public Mobile says some of its customers are having trouble activating RCS (Rich Communication Services) after switching ...

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

AT&T’s new AI-powered Geo-Modeler predicts and fixes network issues in seconds, offering a glimpse into the future of 6G ...