I had this problem with my old S5 which is a good phone. Its a simple fix I did it in 5 minutes. Its not software its simply at the back of the phone near the on/off power button. You just have to prise off the small cover next to the power button. Under this there are 2 little contacts that just need bending up a bit more. Search the utubes for this , I just followed the utube. Works great now.