The firmware takes up too much. Mobile phone cards need to clean up files. The specific steps are as follows:

1, first turn on the mobile phone, find file management on the desktop, click to enter the page, and select the option of "cleaning files" in the page that appears, as shown below.

2. Enter the cleaning page, and you can click the "one-click cleaning" button.

3. Similarly, you can select the "Deep Scan" button.

4. Look at the "Load from Memory/Data" item, check and delete it.