I was reading in the forums awhile ago and came across steps to help the Thunderbolt obtain a 3g signal during an outage. I tried it a few weeks ago when mine was on 1x. It worked, but since then I've had absolutely horrible battery life. In retrospect, I should have read more about it before trying, but live and learn. I don't think it's a rom issue, but I did try flashing to the most recent version of BAMF Forever just in case. Below are the steps I used to get 3g. Any help would be greatly appreciated. Thank you.
1 Go to the Thunderbolt phone dialer. Enter ##778# and hit send
2 You'll get a pop up labeled EPST with the choice to view mode or edit mode. You want edit mode.
3 You'll be asked for a password. It's 000000
4 Now flip down to modem settings, and then choose Rev. A.
5 Change the setting from eHRPD to enable. Hit OK, then press the menu button on the phone and tap commit modifications.
1 Go to the Thunderbolt phone dialer. Enter ##778# and hit send
2 You'll get a pop up labeled EPST with the choice to view mode or edit mode. You want edit mode.
3 You'll be asked for a password. It's 000000
4 Now flip down to modem settings, and then choose Rev. A.
5 Change the setting from eHRPD to enable. Hit OK, then press the menu button on the phone and tap commit modifications.