Why do loopt have agreements with network carriers
mbrubeck: The iPhone OS doesn't allow background processes for third-party apps.  So normally Loopt would have no way to update your location except when you open their app.  The carrier deal lets them get location data straight from the carrier, whether their app is open or not:http://www.theiphoneblog.com/2009/09/04/loopt-att-work-399mo...