I have an android phone with O2. I have google maps on my phone which I use for sat nav purposes. What I want to know is how much will it cost me to use this abroad- Switzerland, Germany, Belgium, Luxembourg and France. I know my data costs in these countries is 19p per MB but have no idea how mang MB this application uses.

Are there any cheaper option- we don’t have a ‘normal’ sat nav and don’t know anyone who does.