wow... after a week reading through everything and trying everything... I just got LTE on my phone. I bought it about a week ago at Best Buy for the Sprint prepaid. LTE didn't work out of the box, I was about to take it back and exchange it, but I just did something that made it work. I'm on the stock zv5, even though my phone was zv4 out of the box. I did not have LTE on zv4 and was hoping the OTA zv5 upgrade would give it to me, it did not. I literally tried everything... updating the PRL, updating the profile, reset my phone to factory defaults and doing it all over again, I even tried flashing a radio file, but nothing worked. Oddly enough, I was going through the ##DATA# menu last night, hit APN Settings and used the menu option of "Reset to default". It removed the usual APN settings I've seen on my phone all the times before and put some weird generic ones in there. This kinda put my phone in limbo... 3g worked when I set the network to CDMA only, but I never got any data connection at all on LTE/CDMA. Tonight I just decided to update the PRL and then the Profile... after doing that, I went into the APN Settings again and everything was back. Turned off wifi and changed my network setting back to LTE/CDMA... LTE light up almost instantly... so weird that doing this, out of all things, made it work... but finally.