First, get the root permission of the mobile phone. Search and download the "z4Root" program on the Internet, and its function is to obtain the Root authority of the mobile phone.
Connect the phone to the USB interface of the computer using the data cable. At the same time, turn on the "USB debugging" function in the phone. Opening method of USB debugging function.
Make sure that the "pea clip" or 360 security guards are installed on the computer. Then right-click the z4Root installer, click "Open Mode", select one of the APK installation modes, and then install the APK program.
Search and download "RE Manager" on the Internet. This program can modify the system files in the mobile phone at will, which is very powerful. Search and download your favorite fonts online. Unzip the downloaded fonts. Then copy it to the mobile phone memory card and rename the font files to "DroidSans.ttf" and "DroidSansFallback.tt".
Back up the existing fonts of the mobile phone. Run "RE Manager" in your phone, and you will be asked to get Root permission when the program runs. Click "authorize" in the authorization window that pops up. In the opened explorer window, find the Fonts folder under System, and copy the font files "DroidSans.ttf" and "DroidSansFallback.ttf" under this folder to a folder in the SD card for backup. The method of copying files is shown in the figure. (Long press the file name will pop up a menu with the command to copy the file. )