When I got the Thunderbolt I knew i wasn't going to have 4G at my house, but the verizon map said I should have it at work. I show up at work and only seen two bars of 3G. At one point of the day I was looking at my phone and saw 4G pop on the screen for maybe one to two secs. after staring at my phone for 10 mins checking e-mail and such, i noticed that the 4G would come in and out every 2 mins or so. I was looking at the forums and noticed someone posted an app called "phone info" using this app to get rid of 4G to increasing battery life. I installed the app to see if I could disable the 3G and enable only 4G and to see what would happen. Got a lock on 4G and been running 4G for the last few hours with no dropouts. I'm not sure what will happen if I completely leave a 4G area, thinking I will have to change back the setting. Its kinda neat to have faster data connection on my phone then my work buildings two internet connections combined.