It looks like my phone doesn't like ROMs above 4.2.2. All the ROMs i flashed, have a signal problem and occasionally, the WiFi doesn't work.
I've tried to change the modem but whatever version i try... i cannot change it. My baseband (XXUBMG7) is the same.
Now i have flashed via ODIN (as a last resort cause i didn't know what else to flash or try) and lost root and all, the official version available for my country (Romania) hoping for a resolution but... no chance .
As you can see in the picture... when i turn the screen on, i have no signal. Tho i can receive calls when my screen is off.
After a while my signal appears and i can make phone calls.
I can's stay like this... please help! Any suggestions ?