The service consists of calibrating the sensors in current company phones used in the workplace. The calibration takes place in rooms on the premises where employees have access and where the highest vibrations occur. The device is calibrated to send notifications when the employee remains stationary in the area of greatest vibration. In this way, the influence of the environment will not be taken into account, and notification of worker immobility will be sent according to the warning procedure. The calibration is carried out for one model/type of phone used in the plant.