If you can’t set a password on the POCO F7 Pro, it can be related to FRP (Factory Reset Protection). FRP is a protection for restoring factory settings that Google has supported since Android 5.1. FRP is automatically activated when you sign in with a Google account on your phone. At this time, if you want to restore the factory settings, the Google account password is required. If you restore the factory operation without signing out of your Google Account, you will encounter the Google security mechanism. To solve this issue, you need to log in to your Google Account again on your phone. If a VPN APP is needed, please download it from the APP Mall.