Apologies from newbie if this is old issue, didn't find anything right on point. Running--or trying, anyway-- TetherGPS on Casio 771 phone and Nook Color w/ N2A card. Google maps on NC for navigate. Looking for large screen nav and Torque app display for my pre-nav vehicle. This has only worked for about 15 minutes, after 4 days of install, reinstall, checking settings etc. Far cry from demos on youtube. Main issue is that Google maps, when asked to run Navigate, gives me a message that it needs "a build with Driveabout", like its missing a feature, or maybe not getting all gps info over TGPS. Can't tell where problem is, phone, TGPS, N2A card, Maps etc. Devices are tethering, some gps info is being shared, but that's where process ends. I'm not a geek, am reasonably smart and willing to drill down, but looking in this case for a solution and not a hobby. Anyone have this experience, any direction as to where to start, go w/ bluetooth solution? Use something other than Maps? I have a lot of apps on phone and Nook that work as advertised, this one is a surprise especially after seeing demos on youtube.