1, press the menu button, there will be wallpaper options, or long press the blank space of the desktop, there will also be options for setting wallpaper. If you have wallpaper, you can look for it online. Generally, I look for artistic ones on the personalized signature website. Also, the picture must be horizontal, preferably with the pattern in the middle, so that it can just be in the position of the main screen.

2. You can download 9 1 mobile assistant or pea clip computer client. After connecting the computer with USB, select the first option and connect only by charging. There will be options for the application. You can click Add Application and then import the downloaded program file for installation. PS, if your firmware version is above 2.2, you can also choose some applications to install on the SD card.

You can ask me if you don't understand anything. I use G6.