How to stop Wifi from automatically turning itself off? So on occasion, my wifi automatically turns itself off for some strange reason. This happens on both my Lenovo ThinkPad and my Samsung Galaxy S5. Is there a way prevent this from happening?
Turn off Connection Optimizer


Settings -> More Networks -> Mobile Networks -> Connections optimizer -> TickOff connections Optimizer


Or Turn Off Wifi Timer


Settings -> Wifi -> Tap the vertical ... and then Advance -> Wi-fi timer -> Turn off any timer selected.


I hope this works for you.