Hello, boockholdt,
Great question! When I look at the zip code, 83616, I show some LTE as well as some 4G and 3G sites with current modernization going on. What this means for performance for you, is that you will see faster speeds on HSPA+ so long as you are connected to one of our re-farmed towers. Some of the towers (primarily in the southern part of that zip code) have been updated and the towers going north have either not been or are currently undergoing modernization now.