Being able to control the heater in the car with your device means effortless operation of the heater, increasing the comfort experience at the cost of an SMS.
The heater function has two times, in the description called T1 and T2. These show when the car has reached the set temperature. To ensure that only the authorised user can control the heater, the SMS message must contain the car's registration number2 followed by the Volvo On Call system's PIN code.