You can manage the status of a device from the Devices section.
Click on the Manage button to show check boxes allowing you to select multiple units and a drop-down menu of Actions including Activate and Deactivate.
Device Status
Activated: An Activated device will continuously report data. Reporting: the device is successfully transmitting data. Not Reporting: the device is unable to transmit data.
Deactivated: A Deactivated device will not report or log data and pause your monthly service subscription.