Use APKPure App
Get HD Wallpaper for Oppo N1, N3 old version APK for Android
oppo n1, oppo n3 high material quality Stock Wallpaper
HD oppo n series Best reliability
This Application Support Lenovo, Samsung,Xolo, Meizu, Huawei and others android smart phone.
Use like this -
First step Touch View Wallpapers Button.
Second step chose wallpaper and Then Touch Set wallpaper.