IMPORTANT:
This method has been unsigned by apple (sorry)

Step 1: download IPSW
[ Ссылка ]

Step 2 : install iTunes
[ Ссылка ]

Step 3:open iTunes and do a backup

Step 4: on iTunes press shift key on your keyboard and hit on update and chose the ipsw that you downloaded

Step 5: done

Wallpaper link:
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Follow me on Twitter :
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