I would like to inform you that you can unregister the device from RMS, by connecting to your device via SSH protocol, e.g. using "Putty" application for Windows:
- SSH login: root
- SSH password: <your device's password>
and using the following SSH command:
uci set rms_connect_mqtt.rms_connect_mqtt.remove_from_system=1 && uci commit && /etc/init.d/rms_connect restart
Make sure the device is connected to the internet.
If this method does not work I would like to ask you to provide a photo of the device backplate, where the serial number and IMEI could be seen.
Having this information I will be sure, that device are owned by the same person and will be able to remove them from the old company.