I'm trying to analyze one of my boron devices that is exhibiting spikes in cellular usage:
Device history for this device seemed to be the best place to take a look. However there is no data available in the downloaded history for the 24th and 25th!
If the device was failing to connect for those two days, it could be using cellular data attempting to connect, but not successfully connecting to the cloud and therefore not generating any device vitals.
By default, if a device fails to connect it will retry continuously until it succeeds. If you are deploying devices in areas with poor cellular connectivity, it may be worthwhile to add extra code to back off and retry less aggressively after several failures if data conservation is more important than reconnecting as quickly as possible.