Your iPhone has secret codes you can plug into the dialer to access hidden options. These codes "interrogate" the phone to ...

An curved arrow pointing right. Did you know that there are actually a handful of secret iPhone codes? Well it's true, and the features range from extremely useful (like showing your exact signal ...

An curved arrow pointing right. The iPhone has a handful of secret codes — some are very useful for everyone, some may only be useful for some. You can show your exact signal strength ...