After updating to 2.3.6 (GRK39F), I lost all cellular connections (voice and data) effectively making it useless.
There is a page on Google Support for people like me who have faced this same problem.
I successfully installed stock 2.3.3 but I still do not have voice & data. I also tried Cyanogenmod stable 7.0.3
Though the images above did flash the radio back to KB1/KB3, I also manually flashed a couple of radios that I knew worked with my phone previously. Still I do not have voice or data.
Is there a way to make my phone work again?