Im not sure what I did that finally worked. I flashed this boron over and over with system firmware, cellular config, tinker, cloud debugger…I may have just been impatient and didnt let the cellular config firmware run its full course.
Anyway I finally got the Hologram SIM working and the Boron is breathing cyan, however it wont do OTA flashing so I am trying to troubleshoot that. Perhaps a keep-alive issue?
Keep in mind that your actual keepAlive time you need may vary, so test as needed. It may be different on LTE than 3G, I’m not sure.
But more importantly, depending on your application you may not actually need to be connected to the Particle Cloud 100% of the time. As long as you connect at least once in a while long enough to receive an OTA update (and to potentially refresh your time clock), you don’t “need” to be connected to the Particle Cloud. There’s a tradeoff between the data required to send the small keepAlive vs the larger data to perform a reconnection handshake.
I and others are happy to give more suggestions on saving data if you want to talk through your application more!