A couple things I've noticed from connecting to band 26 this week.
When connected to band 26 when making or receiving a call it will use 1x 800.
When connected to band 25 when making or receiving a call it will use 1x 1900 even when 1x 800 is available.
While on a call while moving and connecting to different sites the device will go back and forth between 1x800 and 1x 1900 without breaking up or dropping the call.
I observed this while using my Nexus 5 on .15 modem. I don't know how the network operates on other phones that has modems that work properly. My Nexus 5 will connect to band 26 more than it will connect to band 25 or 41 seems to be the band of choice for this phone for some reason even though I have my band priority set to b41-1, b25-2, b26-3.