What is sim pin on iphone?

A SIM PIN (Subscriber Identity Module Personal Identification Number) is a security feature that can be set up on an iPhone to protect the SIM card from unauthorized use. The SIM PIN must be entered each time the iPhone is restarted or the SIM card is removed and reinserted.

To set up a SIM PIN on an iPhone, go to Settings > Phone > SIM PIN and enter the default SIM PIN provided by your carrier. You can then change the SIM PIN to a unique number of your choice.

It is important to remember your SIM PIN as it is required to access your phone's network and make calls. If you forget your SIM PIN, you may need to contact your carrier to unlock your SIM card.

Using a SIM PIN adds an extra layer of security to your iPhone and helps prevent unauthorized use of your SIM card if it is lost or stolen.