In another thread I described my issues with callers on the other end hearing reverb or echo, so I ended up FDRing the phone, which worked to fix the problem and led me down the road to the following ( I thought I might have to take the phone to the Verizon store to deal with the echo problem, so I wanted to look as unrooted as possible so they wouldn't hassle me): (skip ahead to 'Attempt at OTA' to get to the point of this long winded story): Before I FDRed, I did the following: I unfroze everything that had been frozen but not deleted (I used AppFreezer to freeze and unfreeze). I also made sure USB debugging was turned on and that ADB could see the device. After unfreezing apps, I used unlockrootpro to unroot, and I also used SuperSU to be sure I unrooted (SuperSU has an unroot function). I then checked with some root checkers to be sure I was unrooted. All of that because I'd read about people on the forum having problems with their rooted phones when attempting the OTA update. So I was as close to stock as I was going to get just prior to FDRing for whatever that was worth. When I was rooted, I had deleted a bunch of bloatware, frozen some stuff and done ithe ncoming call and foreign SIM card mods and some other minor rooty stuff. But I decided to do the OTA update anyway, with the knowledge that I had insurance if I really screwed things up. Attempt at OTA I'd had the Mobile Care apps frozen so the update had not pushed to me when it was first released. So once that was back on and I'd FDRed, I went to 'About Phone' in Settings then 'System updates' and checked for an update. I downloaded the 227MB file and tried to update. The phone rebooted and I got the robot with the blue wire ball in his guts. yay. At 38% I got the robot on his back with the red triangle in his guts. boo. I rebooted and it loaded the OS. I looked in the system update tab and it said the update had failed due to error 402. Whatever that is. So I tried all over again. Same thing. Researched on XDA. There is a Windows app called Verizon Software Upgrade and Repair Assistant. We all have this already. When you connect the phone via USB to laptop, the drivers load. One of the exe files there is called TL_Bootstrap.exe. If you run that it will install the Assistant. Once you run the assistant, you can do a repair of the phone (not sure exactly what it does to repair things) OR you can download the update and install from that interface. Not OTA. It took a long time to download to my laptop, and about 8 minutes to actually install it on the phone, but I'm running 4.1.2 now. I also have all the crappy bloatware that I'd deleted when I had root, back on my phone (like Zappos!?) So there is an alternative to the Over The Air update method, and a repair function with unknown capabilities which needs to be further explored. I am currently not rooted and will probably keep it that way for now. Once installed the assistant lives in your taskbar tray area or can be uninstalled via the uninstall list in control panel.