We have a set of Particle Electron’s devices deployed in the field that are using Twilio SIM cards. Between 11/6 and 11/9 all of these devices stopped connecting to the particle cloud, and we just noticed this outage about three days ago.
At first we thought this was an issue with Twilio’s network, but upon further investigation we found that new devices with Twilio SIMs successfully connect to the network but fail to handshake with the Particle cloud. After searching the forums we found the following quote:
and we searched through the particle firmware, finding that in all versions of the firmware past 0.6.0 the UDP port for Twilio SIM cards is hard-coded to 4500, rather than the normal 5684.
Unfortunately we do not have access to the deployed devices, and therefore cannot manually change the keys server as suggested above. Now that the servers listening on port 4500 are not running, is there any way to remotely recover these devices? Was there any notice about the planned decommissioning of these servers?