GSM, CDMA and UMTS are all dead or on their way out in the US. In terms of LTE bands I think T-Mobile (or MVNO's depending on their network) is the sole choice.
It might work on verizon but it lacks their low bands so coverage won't be good. No way it works on AT&T due to their stupid IMEI whitelisting. Notably it's also missing T-Mobile's N25 which is probably going to be their main midband 5G band eventually, but it has all the others (no B26 LTE but that's old sprint towers almost entirely phased out)
