I love the MAX BR1 mini hardware. It is the product I was looking for just could not wait to give it a try. After a quick setup I noticed the device was using 1.4 MB of data each day with nothing connected and InControl disabled. No health checks etc. The MAX BR1 mini should not be using any data while connected to the cellular network but it was. I opened a ticket and was asked check everything and confirm what I had already configured on the device. I did send the diagnostic report and network captures as requested. They even had me enable the InControl so they Peplink support could check the device. I changed SIMs just to see if that made a difference. I observed the same behavior with the second SIM. I opened a ticket with my carrier Hologram.io and offered the pcap files for them to review. The next day I get a very detailed analysis of what they found in the file. The MAX BR1 mini was the source and I am now waiting for Peplink to come to the same conclusion and render a fix. Peplink should be embarrassed by the lack of knowledge of their product creating a very ineffective ticket screening process. For those using the BR1 mini that have experience the excessive data usage there is hope that a solution is on the way. I hope Peplink will improve the product support by not assuming the customer is an idiot and does not know how to configure the device. I think the hardware is not the issue and I hope this is resolved quickly. If resolved, I will still purchase the BR1 mini for my solution. I got this far because I did not give up and just documenting what I found to the point anyone would draw the same conclusion that the BR1 is the source of the data. The carrier confirmed this as well. I hope some good will come from this. Look for the response from Peplink.
Update:
The MAX BR1 mini and my guess all Peplink products run what they call smart services on the device that cannot be disabled so there will be some data usage generated by the device. The minimum monthly is 5MB assuming it is running all the time. The initialization of the service has the big hit depending on how it is used you could see 20 to 30 MB for this. For many this is not an issue but for IoT and low MB plans it is something to consider.