Recently I updated my TMO S4 (M919) via Kies, to the 4.4.2 update. Not a leaked or aftermarket update, pushed from Samsung via Kies.
After the update, my Wifi no longer works. It doesn't even turn on. I can connect to the cellular network, better than I was able to before the update somehow.
Here is the information on my phone:
Model Number: SGH-M919
Android Version: 4.4.2
Baseband Version: M919UVUAMDL
Fri FEB 14 14:38:24 2014
Build Number: KOT49H.M919UVUFNB4
SE For Android Status:
Fri Feb 14 14:38:24 2014
Security Software Version: MDF v1.0 Release 2
*#1234# result is "unable to process request"