Ok Austin Folks,
I just got a small but valuable nugget of information from the Sprint Store in South West Austin, Located at Mo-Pac and 290.
The guy there told me there is only one tower in South Austin with LTE turned on at this point and its someplace on S. Lamar. So any signal hits in that area of town for a bout a 5 mile radius are the same tower source. (A Pretty Impressive Range!) EDIT: Looking at my other screen captures for the signal strength confirms the same tower. He also said there were 2 confirmed LTE towers on in the North Austin Round Rock area but did not know more precise locations. Once LTE goes officially live (no date given) There will be many more towers. That will have it and signal will not be an issue.
While talking with the guy my phone would go in and out of 4g inside the store.
I did get a screen shot while in the DEBUG menu to capture my signal strength. Which was WEAK.