4G connection drops and only reconnects after SIM card removal and reinsertion

[MariusSteller]

I’m having an issue with my 4G connection on a router. Occasionally, the connection drops completely and does not restore, even after rebooting the router. However, I’ve recently discovered that removing the SIM card, waiting for the router to detect its missing, and then reinserting it restores the connection.

Setup Details:
Router model: RUT240
4G modem/device: EC25ECGAR06A09M1G_01.001.01.001
Firmware/software version: RUT2_R_00.07.06.16

Questions:

1. Why does the connection restore only after the SIM card is reinserted?
2. Are there any settings or configurations to prevent this behavior?

[Martynas]

Hello,

Thank you for your message.

1. When the SIM card is reinserted, the modem reinitializes the connection process. This action forces the modem to re-detect the SIM card and re-register with the network.
2. Instead of re-inserting the SIM card, you can try restarting the mobile connection via the router’s WebUI (Status → Network → Restart connection).

2.1. For a more optimal solution, configure the Auto Reboot function to restart the mobile connection or reboot the modem automatically when this issue occurs.

Here’s how you can set it up:

• Go to System → Maintenance → Auto Reboot.
• Configure the feature to monitor connectivity (e.g., using a ping to a reliable host like 8.8.8.8).
• Set it to Restart the mobile connection or Reboot the router if connectivity is lost.

Here’s an example of how the configuration could look:

If you need further assistance or have additional questions, feel free to reach out.

Best Regards,