I admit I am charmed by this system, when properly connected and programmed, it offers GPRS signal, SMS and GPS to locate your vehicle, a smartphone is enough to know his situation, an order stops the fuel pump to immobilize a stolen vehicle. Please note, although the antennas to gain reception, contrary to what is said, it continues to transmit to the fourth basement Only downside: Instructions in English - and outdated imei to benefit from available server. Nothing serious happens on the smartphone Google Map I recommend it