I unrooted and reflashed my Thunderbolt back to stock following the guide on these forums, and since then I have been unable to get a 3G or 4G or even 1X signal. It seems data is completely turned off on my device. I have used the #*#* number and also ##778# as posted on these forums. I still can make calls and send and receive texts just fine. I have never had a problem like this reguarding Verizon activation and I think it might have something to do with the 4G Sim card. Is their a number to dial or something to get that re-enabled?