Not directly. Downgrading via local upgrade keeps FRP. Only a full reflash using EDL or MSM Tool with a patched ROM removes it.

Android 11’s FRP is aggressive. If you reset without signing out, you will face the lock again.

The OnePlus 7T originally shipped with Android 10, but the official update to introduced several security enhancements:

Using software like Unlock Android or specialized service tools is often faster and more reliable for those comfortable with a computer. These tools generally automate the process by communicating with the device in Fastboot or EDL mode. Review Summary Ease of Use

: These methods should only be used on devices you own. Always ensure you have a backup of your data before performing a factory reset. third-party PC tools

You will now be at the home screen. To permanently remove the lock, go to Settings > System > Reset options > Erase all data to perform a clean factory reset. Alternative Method: Accessibility/TalkBack

This is widely considered the most reliable method for Android 11 as it uses official apps to override the setup wizard. Preparation Connect your locked OnePlus 7T to a stable Wi-Fi network. You will need a second Android device (any brand) with the Clone Phone app installed from the Google Play Store On the Locked OnePlus 7T Navigate back to the initial "Welcome" screen. Access the Clone Phone

Immediately press the button. When you wake the screen, you may see a notification shade that allows you to access Settings directly. Key Tips for Success