In May. I am seeing very high cellular data usage (90.8 Mb) as compared to data operations (4,464). This occurred while operating on the Free Plan in my Sandbox. This activity was driven by 14-15 B-series units using LTE in a small city (plenty of cell coverage).
My question is: how can I drill down to see where all of this cellular usage is coming from?
I know that cellular usage is driven by more than Data Operations (mine are generally 175 bytes each). I have read that it also includes OTA code flash, overhead, and 3rd-party services. I have not done a huge number of OTA updates in May (guessing 20-30 total, at about 8-10 sec each - 71Kb RAM is typical). My .bin files run about 48Kb. Best I can tell, that leaves overhead, as I don't engage 3rd party data services. I have a few units which seem to be disconnecting and reconnecting a lot (5-10 times/day, despite cell signal strength > 75%) - if there's overhead associated with that, I suppose it could drive the usage up.
Is there a utility which will show me the source of cellular data consumption?