OK so im having a similar issue, im on my second thunderbolt because my first one was stolen. At my job i had consistent and fast 4g/3g connectivity on my first thunderbolt. after it was stolen, i had to go back to a regular droid and i went to craigslist and bought another thunderbolt. The problem with this current phone is places i had 3g/4g connection i only have 1x symbol. if i were to check my phone 9/10 times it would say 1x. i barely connect to 4g/3g and when i do sometimes it still wont load pages or videos but shows the 3g/4g icon. I called verizon tech, pulled battery, sim car, and did a factory reset but i still get nothing. and because it wasnt bought through them there is no warranty. i have no idea what could be the difference in why my 1st TB connected and and my 2nd TB wont connect for crap. I use my phone alot at work and since the 4G signal is strong out here that was my whole purpose of getting it, now im kinda screwed, any suggestions