My sister was recently given a Sony Ericsson C903. She wants to use it for navigation to Auckland soon. It has GPS but the only software on it is Google Maps which is not that great as the navigation is not there. It also uses up data.

I had a Nokia 5800 for a period and was very impressed with the free navigation that came with the device and used it to drive to Auckland and Wellington. It did not use any data as the map was downloaded of the website and it worked everytime.

Is there anything that is similar for the C903 at all? Even if it was Google maps, I wouldnt mind if it worked fine and done navigation and did not use any cellular data. Any ideas would be really good.