Just bought a refurb direct from T-Mo, of course it's NB4 4.4.2. I did TowelRoot, installed current TWRP, restored Data & System, got stuck at the T-Mobile animation screen (so long the phone was getting hot). Flashed back to Fenny's fixed original 4.4.2 ROM, it booted fine, had Wi-Fi & LTE signal, did TowelRoot, installed TWRP again, restored ONLY Data...
Phone boots & runs fine, makes/receives calls & SMS/MMS but I have no Wi-Fi (won't successfully turn on). Also, I'm constantly getting a "Security Notice" saying "Unauthorized actions have been detected. Restart your phone to undo any unauthorized changes."
What gives? I've tried re-flashing the separate modem files, but it doesn't help.