Is particle able to obtain cellular data usages of SIMs for more than a month? I am aware of the Cellular Data Usage tool in the docs (Cellular data usage | Troubleshooting | Particle) but this is currently capped to a maximum of 8 days.
You may need to poll the request API multiple times, as the report takes time to generate.
Note there are separate API calls for either a User or an Organization — which one you use will depend on whether your device is in your Sandbox, or if it is claimed to a Growth/Enterprise organization.
We decided to track data usage as we noticed low monthly data operations but high cellular data. We determined the source to be from a 10-device fleet in a low cellular coverage area, where the reconnection attempts (handshakes and cloud posts) were burning through the allocated 100MB. We have edited some devices to publish with NO_ACK and decreased the cloud post frequency to see if this can help with the problem.