I use another Boron 2g/3g in Canada since 1 month with no issues but was the same problem to cloud connect like my new Biron. I can’t remember what I done to fix it. Actually I have problem to connect to particle cloud (green led blnking) with a second Boron 2g/3g. The SIM is activated in the Console Particle but not able to connect to Particle Cloud. I have also tried to flash the firmware 0.9.0. and it’s not work. I have tested with 2 differents antennas, no luck. For your information I don’t use third SIM.
I have sent a request to support but while waiting anyone can refer too a similar post as my problem to try to self troubleshooting?