Hi guys I wanted to get some information about the GPS in our Atrix 4g phones. So I know that AT&T Navigation charges you and Google Navigation doesn't, but they both use data to locate your position to navigate you to your destination. I was reading around that you could actually just turn on the GPS in our settings, turn off the wifi and use the GPS to pinpoint where your location is as long as I have the maps on my sd card, but it will take a little bit longer, I wanted to know if I did that and just used the internal GPS for navigation, would it give me turn by turn? Also what could I use for the maps on my sd card? I already deleted At&t Navigation, but I still have Google Navigation.