I know I'm not on your topic, but if you have good internet, 10Mbps+. Look into the Airave. Because you don't have service there, Sprint will send one to you free. It plugs into you internet and gives you a mini cell tower for your home. Voice and 3G.
Sprint Link
I have 3 of these, and they work wonders. Note tho, my buddy is out in the rural and has one of my lines. He only has like a 1.5Mbps Internet. It works just fine, he does have to reset it once in a while. The other 2 are on a 10+ and never have issues.