When on US Cellular roaming, my G5 was always on SRLTE. I think that's how it determined whether to roam on LTE or not; if it had 1X on US Cellular, then LTE roaming was permitted. The moment it picked up Sprint CDMA though, it dropped US Cellular LTE.
Actually, as far as I can tell, US Cellular is SRLTE across the board. My US Cellular phone, and my father-in-law's, both always have SRLTE running.
So hopfilly next year they will get 2500 and 800 to Tucson? Sill only 1900 and when i go in a building it drops to 3G. Also i don't know what is wrong with the 3G but the phone says im offline.. Its useless.