Ok so heres the full story about 2.5 years old Samsung galaxy tab s 8.4 Tm-1700 Something was wrong with the battery or screen because it kept crashing, sent to samsung and they fixed that, ever since its been laggy,slow, and just crap. I LOVE THIS TABLET AND I DONT WANNA SPEND MONEY!!!! Ive used up my spendings on my new bae (s7). PLEASSSSSSSSSSSSSSSSSSSSSSSSSE HELP! The tablet was rooted with kingroot but unrooted and ill gladly reroot it. I have reset multiple times but that didnt help! PLEASE PLEASE PLEASE HELP!