Abstract: The device relates to the field of mobile telephone connectivity and can be used during telephone communication, for example, while operating a motor vehicle. The universal hands-free device for a mobile phone with BLUETOOTH comprises a main block activating a receiving-transmitting BLUETOOTH module, and a detachable microphone electrically connected to it, a display block, a module for reading and storing data from the mobile phone's SIM card, and a remote control, optically connected to the display block. The module for reading and storing data from the mobile phone's SIM card can include a Universal Serial Bus (USB) port.