Unstructured Supplementary Service Data (USSD) codes are strings of characters primarily used by developers and technicians to troubleshoot smartphones. You can use these codes to learn more about ...

Coders have a storied tradition of creating back doors in programs (or sometimes just fun little Easter eggs) that can only be accessed with a special "key." This has happened for almost as long as ...

Hang up and use a secret code to combat AI smartphone attacks, FBI says. Update, March 22, 2025: This story, originally published March 20, has been updated with details of a new law enforcement from ...

Here's how to easily access powerful tools, system info, and settings buried deep in your phone. I’m one of PCMag’s mobile writers. That means I check out phones, hotspots, and mobile networks.