Li Jing ng90 10 No matter what wallpaper background is changed, is there any problem?

Then clean up the data of the mobile theme park and the data of the system interface (Settings->; Advanced settings-> Application management->; All-> Theme park/system interface), and then download the theme in the mobile theme park and try again. Also, if your phone's contacts and settings are all black, click Power Saving Management in the phone's system manager-click the normal mode with a white background, or you can turn the phone's colors on and off in the phone's settings-advanced settings-auxiliary functions ~