One thing I wish I would have thought of…
When I purchased a SIM for the BR1 mini, I wish I had chosen a nano SIM with appropriate SIM adapter to fit the larger slot. With adapter, the nano size sim can fit in a device that wants a larger SIM such as the BR1, but you can’t put a larger size sim in a smaller slot! Tonight I had many devices around that have nano SIM slots that I could have used to troubleshoot, and no other devices available that would take the micro or full size SIM.