Bluetooth is a wireless technology that allows devices to communicate via high-frequency radio signals. Bluetooth headphones are just one of the many devices designed to work with portable music devices as well as ordinary phones. With Bluetooth headphones, you can listen to music as well as make and receive calls--all from the same device. Connecting them is a snap.
Turn on your cell phone. Enable Bluetooth by accessing your phone's general or network settings. Your phone will search for Bluetooth signals in the area--they are usually denoted by a small icon displayed on the screen. If you don't know how to turn on Bluetooth or aren't sure whether your phone supports Bluetooth technology, refer to your phone's user guide.
Turn on your Bluetooth headphones while near your cell phone. Turning on a Bluetooth-enabled device will usually put it in pairing mode, meaning it is actively searching for a device to connect to. Since your phone also is actively searching for a Bluetooth device, it should find it right away and prompt you to connect to it. It may ask for a password--refer to your headset's user manual for the default password and how to change it.
Test your connection. Once your headset is paired, the phone will usually start sending calls and audio to it without any additional configuration. Some phones may prompt you and ask which device to use. Try making calls and/or playing music. If you hear music from only one ear, your phone may not support stereo Bluetooth. If you don't hear anything, re-pair the headphones. Power off your phone and headphones, then turn them back on and repeat steps 1 and 2.