the GPS radio application inside the BlackBerry is free. However, most mapping applications that make use of the GPS radio require a data plan in order to work. You see, the GPS inside the device is just used to pinpoint your location. The mapping programs, like TeleNav or Google Maps, show that location on a map. In order to give you directions they need to send data to your device, thus requiring a data plan. so if you buy a Blackberry phone and use GPS on it, you should pay …

garmin provide mobile gps for blackberry cellphones. if you want to add gps service to your blackberry,garmin gps is a good choice. garmin provide many gps map choices. most of the BlackBerry devices do support the 3D maps. but the following blackberry cellphones DO NOT support 3-Dimensional Mapping, only 2-Dimensional Mapping:
* BlackBerry 7100i
* BlackBerry 7100g
* BlackBerry 7105g
* BlackBerry 7100t
* BlackBerry 7520
if you want to find more garmin mobile gps services …