Data traffic during a race
For each GPS update we send the current coordinate along with additional data such as time and speed. It’s a very small amount of data that is being sent from the phone. So even with a slow mobile connection it will be possible for your friends to follow you during the race. On average the amount of data for all location updates during a race is not more than sending an email.
If your race is abroad or if your race takes place in multiple countries you will need to enable "data roaming" for RaceONE to work.