In this starved-for-high-speed coverage corner of the Navajo Nation, suddenly we've seen LTE signal show up in the area. We heard a new tower was going up, and I've seen via the OpenSignal app new towers in the area. So, there's excitement. (I get 2 bars of 3G, for example. When the wind blows right.) So we were wondering if there is a timeline for when the LTE service will be fully up and functional. I got the sensation that things might be in a "test mode" right now.
Because towers are so far apart out here, signal varies widely. I'm interested in a cell repeater and a jetpack/hotspot, but obviously whether I need a 3G version or 4G makes quite a big difference.
Any answer not of salesperson boilerplate would be appreciated. 
Thanks.