Boron stuck flashing green, won't connect to internet

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I’ve used this Boron before successfully, but after a few months away from it I plugged it in and I can flash code to it but it never starts breathing cyan. Because it never starts breathing cyan, I cannot read the serial monitor, which I need to do. I do not have a sim card. I think the antenna is intact–nothing indicates that it isn’t. I think the cell plan was cancelled for a while but I just updated my credit card and reclaimed my device.


Reclaiming the device doesn’t really do anything to the SIM or its activation.
Have you checked the status of the SIM at

You can also flash this code to debug your issue


Hi, thanks for the response. I found this morning that it can connect to the internet now that I’ve added a working credit card to my account. Cheers!