I plan to replace my old cell with iPhone 3GS, and I would like to know if I can use Navi app with pre-loaded map, like TomTom USA, without using 3G service on iPhone 3GS? My cell carrier is ATT but I don't join any data plan (my plan is basic voice plan, $37.19 per month), and I want to keep this plan after I have the iPhone 3GS. The only thing I care about is GPS navigation as my old cell, Nokia E71, can function with GPS navigation with pre-loaded map (Garmin Mobile XT) without using any 3G connection. Please let me know if iPhone 3GS is able to perform the same function, I mean GPS navigation with pre-loaded map app without any 3G connection.
1 - I think that should work.
#2 - AT&T usually REQUIRES a data plan with an iPhone. Apparently, they claim to be able to recognize that someone is using an iPhone. Call & ask, it can't hurt!
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