By entering certain strings of numbers and symbols into your phone's dialer, you can gain access to a world of hidden ...

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 ...

Did you know your iPhone keypad can do much more than just typing phone numbers and making phone calls? You can use it to enter iPhone secret codes to do all kinds of things, such as troubleshooting, ...