Its been more than couple of when im trying to find out a perfect solution for my LG OPTIMUS G (Olleh), showing null IMEI, Service disabled & a small redcross over a network bars. I've tried several baseband flashes, ROM flashes (including sling ROM), several applications for restoring & backing up IMEI but no luck. But the most weird thing that i've faced when i touch some points on LCD screen sometimes it shows signals after some moments, it disappears.
Im currently running Android 4.4.2. Help me out guys pls!