I have a US Cellular air card, and have had no problems at any location. I tried Verizon, but it did not work at the home base. We were between 2 towers and the connection jumped back and forth. Finally Verizon asked us to end the contract and refunded every $. US is also $10 less per month for the same amount of down loads, etc. Right now I am satisfied, at least for the next 10 minutes.