Ivan Zupan that owns the Cellmapper App and hangs out of HoFos Canadian networks boards updated his App by adding a Filter called Band in the lower left of the board in options [PC only at this time]. Now just put in USA [Country code 310], T-Mobile [Provider code 260] and slide down to the select Bands section then only check Band 12. Then it shows only the Towers that Cellmapper has acquired data Along with at least one Band 12 cell sector unit. It does show all the other sector bands [i.e. Band 2 & 4] in that tower if you click on that one tower on the map. Thank you Ivan Zupan since this saves me a ton of time looking for 700Mhz Band 12 towers in the USA. Also, it now justifies me purchaseing a new phone since I have a few Band 12 service in my area. This also privides the option to filter to just Band 2 or 4 in addition to band 12.
Note, this Band Filter can only be viewed on the PC at this time since Ivan told me on his Google+ page that the [Phone] app, it will require a bit of work.
Thank again Ivan for all the work. Glad I found you Cellmapper community page on Google+.
If you are on a PC then all you want to do is go the Band section in the lower left side of the page and unclick all but Band 12. http://www.cellmapper.net/map?MCC=31…8215691&zoom=5