You should definitely get better in building coverage after NV. Now in terms of LTE, you may or may not get that in buildings. Due to the more fragile air link, LTE will drop at low signal levels, even on 800 mhz. On at&t for example, I've had LTE drop a couple miles away from the tower outside, with trees inbetween me and the tower and switch the HSPA+ on 1900 mhz. If it wasn't for the increase in efficiency, capacity, and speed; LTE would seem like a downgrade from older technologies.