If your iphone 12 works very slow, hangs up, it has a full memory and you want to erase everything because you want to sell it, or give it away and you don´t want anyone to have an access to your files and passwords, then you can do a factory reset.
These steps will explain you on how to format your iphone 12 and erase all your information and make it totally clean as when it was new.
Please do not forget that a reset or return to the factory state in your iphone 12, deletes all its content, so you must make a backup of your data, before doing it if you do not want to lose everything.
Start with unlocking your smartphone with the Side button
Secondly, go to the Home screen and select settings.
After that find and open General bookmark.
Choose Reset and Erase All Content and Settings.
Now you should see warning message to confirm.
Enter your passcode if asked. Finally confirm all the information and wait to finish operation.
Well done!! You have performed hard reset operation.