The device name should be listed on your phone as PH-BTW55. If it is not listed, try pushing the pairing button on the top of the speaker in between the volume and select track buttons. This enables the pairing mode and the blue LED light will be flashing quickly. Also, make sure you are within the effective distance of the transmitter being 33 feet or 10 meters. If this still does not fix the issue, there may be a problem internally with the Bluetooth transmitter.