Based on the title of this thread, I thought my experience with my un-rooted, stock TBolt would find interested ears... if not, stop reading now
I've been very happy with my TBolt. I am in an initial LTE city (Denver). I was very surprised to find that I even had LTE at my house. Even inside my house (have always had RF issues inside my steel-siding house, especially in my garden level office half below ground).
Recently I changed my plan to Nationwide FS+Mexico (from Nationwide FS) 'cuz I was going to Mexico for a week. I noticed that when I rebooted, my PRL changed from 15018 to 15015. I figured... hmm, good, looks like the plan change is in place. Phone worked well in Mexico. Exceedingly well. But, I kept Wireless data Roaming turned off and used Wifi while I was there to avoid horrendous data roaming charges.
Anyway, got back home, changed my plan back to Nationwide FS, rebooted and got PRL 15011. I fully expected to return to to PRL 15018 just like before I changed my plan. But I didn't.
Then, I no longer had LTE anywhere inside my house, nor hardly anywhere close by outside either. When I drove around through town I did have LTE. But no longer at my house. I called CS and asked if I could be pushed the PRL I had before this trouble (15018). I know that a PRL should not matter here, but I was out of ideas. First, the technician explained that he couldn't do that. And that the ThunderBolt basically provisions itself at each restart (including any PRL updates). Actually I knew that, but I was grabbing at straws. I'm thinking... damn, I guess my TBolt RF Radios took a dump somehow. Then he said... just a sec, let me check for outages around your area. BINGO! There was a large cell site down in my area. I waited three more days (now a total of about a week) and LTE was back at my house as always. Same PRL of 15011.
Lesson: Slow down, take your time. Give VZW a chance. Check for local network outages. And, more than anything, resist the temptation to automatically blame the ThunderBolt until you really have proof. It could be the network!
My TBolt is in such good operational status now I'm almost afraid to apply the next OTA (MR2). My MR1 TBolt is a hummin'. Why fix it if it ain't broke? Sure has been an interesting journey so far with this "VZW's First LTE Phone!".
-Frank