i stuck in ultra power save note 4 any help plz ?

[AC Question]

i turn on ultra power save then i quickly turn it of then it get me a black home screen & everything else black and its not in ultra power save !!! i can use every thing like normal but in black and i cant turn on or off ultra power save i get error msg

 

[B. Diddy]

Welcome to Android Central! Force a shutdown by pulling the battery. Then boot up normally -- is it still black? If so, pull the battery again, and then boot into Safe Mode: https://support.t-mobile.com/docs/DOC-28897