******** FIXED *******
I wanna share how i fixed my D801
I was desperate as nothing seems to work
so i came across this thread
http://forum.xda-developers.com/tmobile-g2/development/rom-tmo-lp-extreme-v1-0-4-16-15-t3084681
I flashed the stock LP 20b BASEBAND there
and then flashed the extreme ROM
to my bad luck EXTREME rom just boot looped
So, i tried a couple of times wiping the dalviks and cache after each pass
Nothing....
Then... all was lost and i was going to QUIT....
i Flashed Cloudy 3.3 again... in top of the just flashed BaseBand
and guess what....
My Baseband version came back on the software info page on my D801
and the Signal Drifting problem gone AWAY!!!!!! YAHOOOOO!!!!!
Somehow... when you read UKNOWN on the baseband entry on your phone.. means problems
to me it was signal lost every 20 or so secinds
PAIN IN THE ARCEEEE
So all was come back to normal...
Just want to add that before i done my flashing that messed up my modem or radio
i performed a twrp backup...
and when on the middle of the problem... restoring via twrp from my backup
wont fix the problem... even that i made a backup with a perfect working phone!!! odd!!!
so flashing that baseband saved my A...
Thanks to all that helped me or tried to help me on this nightmare
Max.