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 ...

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 ...

It may come as a surprise to many, but there are several hidden iPhone codes that have been part of the iOS user experience for years now. And though most users might find these secret codes more ...