how to sync bluetooth headphones to iphone?
['On your iPhone, press Settings > General > Bluetooth.', 'If Bluetooth is turned Off, tap to turn it On. ... ', 'Place your Bluetooth headset into pairing mode.', 'When you see your Plantronics device name, tap it to pair and connect.', 'If you are prompted for a passkey, enter "0000" (4 zeros).']