Note: Pairing is a process that only needs to be completed once. When the Twiins® HF device is paired to a specific device, both devices will connect automatically when switched off and on. Note: Depending on your phone's Operating System software version, there is a possibility that during the phone's Bluetooth® device search you have to turn off your phone's Bluetooth® functionality and then turn it.on again after two or three seconds, allowing the Twiins® device to find it properly.