We are at Eglin AFB and have Sprint for service and the reception is poor to say the least. Purchased a booster from Wilson Amplifiers and it increased our bar strength from 1/2 bars to 4/5 bars and now we can Skype with the kids/Grandkids without going to a building 2-3 miles away. We can do it inside the MH. It says can increase up to 45dh and can work with both DW and my phone at the same time. It cannot give you service if you have no bars, but if its weak it will boost to give good service. Also you phone can use wifi to call if you go to your settings and turn it on. Hope this helps....