A bunch of new conversions hit the map in Nebraska today. 9 in total, really filling in the Norfolk Loop that Sprint covered but T-Mobile didn't, and filling in along I-80. Plus 2 entirely new sites in Plainview, NE and O'Neill, NE were Sprint nor T-Mobile offered service previously. Slowly but surely filling in the Nebraska shaped hole in the coverage map.
It seems there are areas that T-Mobile signal is held on to instead of going on a much stronger and not converted Sprint tower. It should be seamless by now until those are converted. I guess if T-Mobile didn't care about thar area before they still do not care.
There's a couple of towns by me in WI that Sprint service was much stronger.