Can the address book and SMS of OPPO mobile phone change the theme?

This can't be changed generally, because different mobile phone theme interfaces are different, some themes can be changed, and some can't be changed.

What if the phone can't be upgraded?

"Mobile Desktop-System Update" online upgrade operation failed:?

1. Mobile phone settings-applications-all system updates. Please try the operation again after clearing the data;

2. It may be caused by network instability, so it is recommended to try to switch to another network;

3. The mobile phone is too root, and it cannot be upgraded normally after root. Please download the firmware package of this model for manual upgrade.

Unable to download firmware package manually:

1. The mobile phone has backed up important data (SMS, address book, etc. ) (You can operate through "Mobile Desktop-Cloud Service" or "Tools-Backup Recovery");

2. Confirm that double clearing has been operated: press and hold the power button+volume down button for about 10 second after shutdown to enter OPPO recovery mode, and select Chinese Simplified-Clear data and cache;

3. If the manual brushing machine is still unsuccessful after double cleaning, it is recommended that you take the relevant warranty certificate to the customer service center for testing and handling.