Same thing...but
I had the same issue with the 3g going from 1x to 3g-d then nothing.............but what happened next was truly odd. The 3g icon would disappear completely then pop back up but it was ver sluggish if it connected at all! It was if it was never there. I went back to stock froyo same thing. Verizon had me do the esn swap stuff and I had already done a factory reset once back to froyo so they overnighted me a new fascinate......Im on my 3rd one thus far.....the original one I purchased allowed me to do updates until I got to froyo, then it would not do over the air updates, second one was the disappearing 3g icon, and I just cant wait to see what if anything happens with this one. Regardless of what happens with this one, I will always love my fascinate.....