Called in for or an emergency on wed 18 Sept only to be told by the operator "your unit is not functional". I was "Told" i needed to "upgrade" as I did not test my unit monthly as "it" was now out of date and not working. I called today to enquire be to be told by a "Julie" that someone will call me to make arrangements. GUYS you a joke, take your useless company and equipment and put it up your a. Let me go find a security tracking service supplier who can deliver. To with Merc and Audi that recommend you when buying new vehicles YOU! I will never install your devices in my vehicles again!