How to set the background of oppo mobile phone call?

The setting method of oppo mobile phone call background is as follows:

Tool: oppo r9

1. Find the "Settings" option on the phone desktop and click to open the Settings page.

2. Find the "Phone" option in the setting interface, and click to open the phone setting page.

3. Find "Call Background" on the phone setting page, and click to enter the call background setting page.

4. Select a picture you want as the background of the call, cut it, and click OK in the upper right corner to complete the setting.

5. After setting, when you make a call, your call background will be displayed on the screen.