I have been testing the XBee LTE-M/NB-IoT modem. I was not able to get the device to send messages to the hologram. I was using the API interface to try to send a message to cloudsocket.hologram.io:9999. The modem would attempt to send, then time out with the error “No Server”.
After seeing a message here from @Steven I went through the work to update the modem to the latest version. It required both firmware and a modem firmware update. It took about 45 minutes to do the update.
After the update, it worked perfectly.
I just wanted to post in case anyone else has the same problem.