I’m using a Sony Ericson C702. I’m looking for an application which allows my mobile phone to navigate using it’s built in GPS without the use of GPRS service to reduce cost. Can someone pleade help me?

if you buy a phone that has gprs can you plug in a gps system? and will it show map tracking?

Please dont give technical differences.I’m having nokia n95 8gb. How can I use gps and gprs with my phone?