Op SMS and wechat pages are blurred. Why?

The screen resolution of the mobile phone is wrong.

Take the oppo mobile phone A57 as an example:

1. Unlock the phone screen, find the "Settings" option, and open it to enter the next step.

2. In the setting interface, find the "Display" option and click to enter the next step.

3. In the display interface, find the "screen resolution" option, and then click Enter.

4. In the screen resolution interface, you can see the custom resolution, and adjust it until you can see it clearly.