Electron breathing cyan but not connected to Particle.io

I built several devices for a client and tested them in Boston before shipping them out. Upon startup in their new location (Mexico City), they appear to be functioning fine (all are breathing cyan), but they haven’t completed a handshake with the particle.io server and I cannot communicate with them. The SIM and module are the same since they should work in both locations - is there something I’m missing? Is this an issue with the device or the cell comms? Is there anything I can do to debug further?

Let me ping someone that might be able to help, @rickkas7 or @ParticleD are you able to assist?


Are you using Particle SIMs, or 3rd party ones?


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These are all Particle SIM cards. They all eventually came online, but some took up to 4 days after breathing cyan…

I was able to get the device log files from our partner on the ground in Mexico and it looks like the devices are failing to resolve the IP address for particle. Errors show:

Any thoughts on what could be causing this?