Default [Q] Galaxy Nexus GSM No Service, No IMEI, Baseband Unknown

Hey, I just accidentally flashed the stock rom of ICS 4.0.4. (LTE version) on my gnex GSM. then i realized i didn't have signal, after that, I installed JellyBean 4.3 Stock GSM but still no service, no imei, and baseband unknown. I tried flashing the radio but still got nothing.
What can i do to recover the service?