How do I unlock an iPhone without a PIN?

Unlocking an iPhone without a PIN is a tricky situation. If you've forgotten the PIN, you have a few options:

1. Use Touch ID or Face ID: If your iPhone has Touch ID or Face ID enabled and set up, you can use your fingerprint or face to unlock it.

2. iTunes: You can connect your iPhone to a computer with iTunes installed and perform a restore. However, this will erase all data on your iPhone.

3. Find My iPhone: If you have Find My iPhone enabled and set up, you can erase your device remotely using the iCloud website. This will also erase all data.

4. Recovery Mode: If you've previously synced your iPhone with iTunes, you can put your device into recovery mode and restore it. Again, this will erase all data.

5. Contact Apple Support: If you're unable to unlock your iPhone using the methods above, you may need to contact Apple Support or visit an Apple Store for assistance.

Please note that erasing your device will result in the loss of all data if it's not backed up.