I have same problem as topic starter. So, do we have any chance to fix that problem?
I try few 4.1.2 stock roms (CEE, O2, RTFR) and nothing. On 4.1.2 i have wifi conection but after i do 4.4.2 OTA update wifi doesnt work
Also, on 4.4.2 when i check system update via my LTE it show me: "we have system update which one will fix your wifi, but you can install it only via wifi" ... Funny joke