How to change the short message characters of smart phones into black characters when the characters are yellow on a white background?

The first step is to click the information icon under the standby page.

Step 2: Click the menu key, and then select Settings.

Step 3, click on the background style.

Step 4, click on the icon with the plus sign (you can also click on the default picture, taking "custom picture" as an example).

Step 5, click on the picture (you can also click on the picture, here "picture" as an example).

Step 6: Click on the picture file, and then select a picture.

Step 7 Select the area, and then click Finish.

Step 8: Click Save.