Mobile devices connect using many different methods. Cellular and Wi-Fi can be difficult to configure, and require extra equipment such as towers and access points. Cable connections are not always practical when connecting headsets or speakers. Bluetooth technology provides a simple way for mobile devices to connect to each other and to wireless accessories. Bluetooth is wireless, automatic, and uses very little power, which helps conserve battery life. Up to eight Bluetooth devices can be connected together at any one time.

These are some examples of how mobile devices use Bluetooth:

Bluetooth is a networking standard that has two levels, physical and protocol. At the physical level, Bluetooth is a radio frequency standard. At the protocol level, devices agree on when bits are sent, how they are sent, and that what is received is the same as what was sent.