Well, what those suggestions did not do is help you place this in the gps subforum but a moderator will move it. Trekbuddy requires you to provide your own maps by finding them online, downloading and then loading to your BB. It does NOT provide turn-by-turn unless things have changed since I last used it a few years back.
The other os MobileGmaps (not google) which has similar needs - download in advance what maps/areas and get them to the phone.