Downgrade Miui12 20.8.13 (Android11) to 20.7.30 (Android 10) without Format?

[Asimo]

Can I Downgrade Miui 12 20.8.13 (Android11) to 20.7.30 (Android 10) without Format? Because this lastes weekly versions of Android 11 have a lot Performance Issues! And I don't want a Top Xiaomi Phone lagging...

 

[LOLO9393]

Can I Downgrade Miui 12 20.8.13 (Android11) to 20.7.30 (Android 10) without Format? Because this lastes weekly versions of Android 11 have a lot Performance Issues! And I don't want a Top Xiaomi Phone lagging...

100% sure you must format data again....