Hello,
We have some Ezurio MG100 devices (with HL7800 modems) using Truphone SIM cards to access an LTE CAT-M1 network.
Occasionally, we experience difficulties with the devices failing to register with the network. When the issue occurs, the device will either continue searching for the network without success or it will ultimately receive a registration status of “Registration denied”. Other times, the network can be registered successfully without issue.
I’ve seen forum posts reference similar situations (e.g. HL7800 Registration denied with Rogers SIM cards), and I know that the problem may simply be due to coverage issues. I have already been in touch with the mobile network operator to see if they have any further information on their side.
In the meantime, is there anything that can be done on my end? For example, are there any AT commands I can attempt to further diagnose the problem? Are there any optimizations I can make to the modem configuration to improve its chances of successfully registering with the network?
The devices are often used in the same location, so I’d find it surprising for the network coverage to change drastically from one day to the next.
Thanks,
Andre