We tested FirstNet here and we were not impressed. For every talkgroup from our LMR system, we had to provide a radio to connect to their gateway. We tested FirstNet and L3Harris' BeOn and the latter was much better. AT&T does not have good coverage in our area and BeOn works with any LTE provider. I get it with AT&T giving priority on Band 14, but if your device does not have service, all the priority in the world is not going to help.