How to restore oppok7x when it is updated?

After the mobile phone system version is upgraded, it can be downgraded to the previous version. However, in the process of updating the mobile phone, the bottom of the system may be modified. If you want to downgrade the mobile phone system version, it is recommended that you back up your mobile phone data (phone number, SMS, photos, etc.). ) and bring the mobile phone, purchase invoice and warranty card to the nearest OPPO customer service center for processing.

Tips:

Because Google designed the anti-brush-back mechanism (CTS authentication) in Android 10 version, the native model equipped with Android 10 version can only be downgraded to the benchmark version, please understand.

This answer applies to all OPPO models.