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 ...

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 ...

Use these codes to forward calls, pay your bill, check balances, etc. Some of the codes work only on certain carriers or devices. One of the codes also might erase your data, so use with caution. I've ...