No need to worry about that. I get GPS reception walking around in my house. I barely get a cell signal in there! There are really only 2 things to think about when considering buying this unit, besides money... SIZE, as it is a big unit, and you should figure out if it will fit anywhere in your car, and if you want voice commands to control the GPS - as opposed to just the media player. This unit does not have voice commands for navigation. Other than that, after playing with it for a couple of days now, I find zero issues with it, and many benefits. My biggest problem right now is finding the right place for it in my '09 Audi A4. Its a small car, and it already has a non-navigation LCD screen right where I would have put this unit.