From what I understand, the vast majority of users who can't achieve a very good connection are those stuck with towers that aren't fully equipped with both bands. If Rain were to run 2600TDD on all of their towers instead of just some, I'm pretty sure that everyone would be happy. We are kilometres away from our tower, use a high gain external antenna, force band 38, and we have consistent speeds of 40-80mbps in an area that isn't even officially covered.
The 1800 band towers are just too congested, with our set up, we can still manage to pull a decent 30-30 connection a lot of the time on the 1800 band, however, at more congested times of the day, it functions as a 10mbps down, and 20mbps up. I know that isn't that bad, however, we spent a lot of time and effort readjusting our antennas in multiple positions, altitudes, and did a lot of research on the positions of all of the nearby towers.
If anyone is able to pick up a 2600TDD signal on their router and is getting subpar speeds, shoot me a DM, and I'll do my best to help you out.
I'm not sure how things are going to go with the people trying to get CA to function on MiFi devices if those are able to support external high gain antennas, I'm keen to hear more about it. I have a phone capable of such aggregation and will run some tests myself later.
Best of luck ^^;
optimal antenna position:

semi optimal antenna position:
