Please confirm your mobile phone is Bluetooth-enabled and supports standard Bluetooth HSR HFR A2DP and AVRCP profiles. Make sure your Raptor-i and your mobile phone are close to each other and enter the PIN code "0000" if prompted. If you are still unable to pair, you may have previous pairing information that has been visually deleted but is still stored in your mobile phone's memory. Delete all Raptor-i pairing information from your mobile phone. Consult your mobile phone's user manual if required. Turn off your mobile phone completely. Remove the battery if possible and replace it after 20 seconds. Turn on your mobile phone and attempt pairing again. If you are still unable to pair successfully, delete ALL remaining pairing information and repeat the procedure.