Abstract: A method for determining a data set by means of a telecommunications device is provided, wherein the data set represents a use of a predetermined vehicle. A communication connection is established between the telecommunications device and the vehicle. If the telecommunications device detects a movement pattern that corresponds to a vehicle movement, it retrieves status reports from the vehicle. At least one comparison value is formed from parameter values of the status reports and parameter values of the telecommunications device. If the comparison value satisfies a predetermined criterion, it can be assumed that the telecommunications device is actually located in the vehicle to which it has connected. Data of the vehicle can now be fused with data of the telecommunications device.