Direct connection via GSM modem
This connection requires a GSM SIM card specifically for managing data traffic, and the related rates will depend on the country where the SIM card is used and where it has been purchased. You will need to have at least a 2-year contract with the provider. Nonetheless, connection times during repairs are fairly long due to coverage issues, stability during the connection is not guaranteed, and this solution does not allow for software updates. The SIM card is your property.
For MTA machine