Unlock iphone12??

Hello,

See this:

If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled

Also see:

Turn off Find My iPhone Activation Lock

Good luck.

Quickly press volume up then let go then press volume down quickly let go then hold down power until Apple logo comes on then release.

please note theses actions are all separate finger actions they are not held down together. Plus it may take a couple of times.