From the AngelSense Blog:
Proactive alerts to routine deviations and providing consistent location updates in poor GPS and cellular conditions are indispensable features. Supporting these capabilities require enough power to sustain the device and can only be achieved with larger battery size and an equally accommodating device.
*NOTE: The GPS 1 is the default device when you order.
Verizon is updating its network to cover only new technology and all others, like our GPS 2, will eventually overtime will be phased out. They will no longer be activating new 3G devices, but this does not affect our current GPS 2. We are in the process of working on a solution that meets all of our clients’ needs so that we are prepared when the time comes. Please do not worry, we are making sure to plan ahead and there will be no service interruptions. As soon as we have more information we will reach out to you.