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 ...

The Settings app is great, but it’s not the only way to change your iPhone’s options and functionality. Those who want to dig deeper into the system can take advantage of iPhone secret codes, ...

You could access numerous useful iPhone features by typing in a few secret codes on your device. Lots of the codes work whether you have an old or new iPhone and they can let you do things like ...