Tomtom Software For Windows Mobile Samsung Omnia-GPS- With Software Like Tomtom (mobile)does It Still Need To Use The Network So Uses My Data?

Samsung Omnia-GPS- with software like Tomtom (mobile)does it still need to use the network so uses my data? - tomtom software for windows mobile

I have an Omnia and I would want to use GPS, but I'm not sure how it works! I Gogle Maps on the phone, but use the internet on my phone and free data download me! I just wanted to know whether, on the other software you can use it like a normal GPS without loading the need for network and data?
It is certainly a Windows Mobile device