I am testing 2 Borons using a Hologram.io SIM card connecting to Verizon CAT M1. Reason for not using AT&T is because these devices are in rural parts of the country where Verizon has better coverage vs AT&T. The issue I have is the Borons will connect fine to Verizon for about a day/ day and a half and then sometime between 11pm and 1am, something happens and they stop connecting to Verizon. Both devices stop around the same time and they are located in separate cities. I am able to access one of the Borons and they are not locked up. I notice the boron goes back to searching for an operator. I have code that clears the Cell tower blacklist which Hologram has reported as a potential issue. Cell strength is about 30-50%. The boron turns on the modem every 30 minutes, connects to Verizon and then Particle, submits a sensor value, disconnects from Particle, and turns the modem back off.
I am highly concerned right now in reliability of the cell connection. Any one experiencing the same issue with Hologram SIMs?