I just logged in to the forum to report the same thing. Who is your carrier and what firmware version are you on?
We are on FirstNet with 4.14. I know previous firmware versions had a bug where the SIM enumeration would fail so when it checks if there is a SIM card available in Slot 1 and 2 it wouldn’t detect either one and would just fail to connect. But I am not sure what the problem is now.
I am seeing random internet drops and our dispatch would have to send the reset text message to the device to remotely reset it in order for it to work again.
After upgrading to 4.14 the devices seem to be bricking themselves completely. I can’t even send a reset message to them. The Wi-Fi and Signal indicator light flash red and trying to connect to alms manager fails using the Ethernet cable. I’ve had 2 devices do this in the past month. I’ve sent one out and they replaced the module. I am trying to troubleshoot the second one to see if I can figure out the cause.