if this stuff, if i'm you, i will do something like "cheating"

mean u get the biggest resolution of bg pics eg 2048 X 1536 pixel of bg pic.

then u set ur wallpaper fix/stretch and unscrollable..so when no matter how big or how small is the resolution, it will still fix with the internet browser. just like u set your wallpaper on the desktop.

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Hash here..