SF Logger sends a salesperson's GPS location via SMS in response to SMS queries by SF Trakker equipped phones. The SF Logger phone does not need an internet connection to work. Only GPS turned on and SMS is required.
When SF Trakker receives the GPS location of the salesperson, the location is automatically shown on Google Maps on the phone. SF Trakker needs to be connected to the internet via wifi or a 3g connection for this to work.
As a security feature, SF Logger can set the mobile no. of the SF Trakker phone that is allowed to request a location.
Search for "Sales Force Trakker" and "Sales Force Logger" in the Android Market.