Reset ipad
How to setup my iPad completely erase and setup as a new ipad and what is d f u mod
This procedure will, short of reinstalling a fresh copy of the Operating System, fully erase the iPad of all data. At conclusion of the procedure, you’ll be able to set-up “as new” from the initial “Hello” screen:
What to do before you sell, give away or trade in your iPhone, iPad or iPod touch – Apple Support