Supply chain, delivery services and field installation and maintenance companies have fleets of vehicles and driver/technicians. Sonim mobile phones have battery life that permits 16 hour (double shift operation), with enterprise class GPS tracking every 3-5 minutes combined with 6+ hours of talktime, all on a single battery charge in a device that comfortably fits in a pocket or on a belt clip. The leading Mobile Resource Management applications companies support Sonim products with geofencing and other advanced capabilities. Sonim products shrug off all weathers and even survive being run over by vans. With their low field failure rates and a 3 year comprehensive warranty, total cost of ownership is reduced when drivers do not need to return to base to address a broken device. Fleets can also replace private mobile radio solutions with (network dependent) push-to-talk services over cellular at much lower cost and improved coverage.