Default No network and Imei 0/00 help!

Ok, i know they are many topics like this but i have read almost everything and still have the same problem...Let's star the whole history:
I have a sgh i727 skyrocket (obviously) and at first it was just the phone network signal that comes and goes...Later i decide to google search the problem and try some solutions....None of them works...worse, after that, i see not network and the imei 0/00. Ok no big deal, just reflashing with odin to the last official rom JB 4.1.2 with the clean instalation (wipe everything). Same issue!!!! I have try almost everything, EFS repair, apk from play store like sgs tool, gsII repair...Flashing Radio I727UCMC1...I have even try NV_reader/writer but no resullts...Nothing works...
So please help!