Hi
I have exact same problem with my Note3.
- Phone was running Kitkat 4.4.2
- Got the phone updated to Lollipop by a repaor guy.
- came home to find that WiFi isn't turning on. It stays gray. WiFi tethering doesn't work either. BT and Mobile network are working fine.
- Wiped cache, Wiped data / factory reset. Didn't help.
- Found a newer version of the firmware and flashed using Odin. Same problem.
Can someone please help me get back my phone Wifi functionality.
Thanks