Answer to: Why can't turn on wifi, hotspot and bluetooth on note 3 SM-N900?I have had nothing but trouble since I was given this XiaoMi Note 4. Have nearly thrown it against the wall several times. Now it is refusing to turn on the wifi. I touch the wifi on and it turns on for a second or two and then flips off. I've tried clearing the cache, did a backup and reset, removed the battery and reinstalled it......nothing works. I think I will use it for target practice the next time I go to the gun range. Truly a piece of crap.