I have Nexus 4 with .33 radio flashed and stock 4.2.2, and I live in downtown Salt Lake City. I got the LTE signal since June but I found out that it's unstable. Basically half of the time only HSPA+ is available, even if I choose the "LTE only" option. When LTE is connected, it's stable for several hours and pretty fast, with 2-3 bars. Is this normal? I'm not sure whether it's my phone's problem or because LTE is recently rolled out so TMobile they need some time to tune it.