Type USSD codes on your iPhone to access hidden cellular features quickly. Here, we'll list some of the most useful ones.

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. 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 ...