Tethering

For other uses, see Tether (disambiguation).

Tethering is a method for connecting a computer to the internet via an internet-capable mobile phone. The computer is connected to a mobile phone either with a cable, with a Bluetooth connection or with some other method: the connection to the internet is completed by the phone.

Many mobile phones are equipped with software to provide tethered internet access via Bluetooth or a USB cable. Depending on the mobile phone's carrier, tethering may be provided at no extra cost. However, some carriers impose a one time charge to enable tethering, while others do not allow tethering at all or impose additional data charges (examples include the 3 network and T-Mobile in the UK) on tethered internet use. Often phone contracts that advertise unlimited or "all you can eat" internet and data usage will bury these hidden charges in their terms and conditions.

Data transfers over tethered mobile phones may violate the terms of use imposed by the mobile carrier or may even be subject to high fees. As cited in Sprint's Terms of Service, "Except with Phone-as-Modem plans, you may not use a phone (including a Bluetooth phone) as a modem in connection with a computer, PDA, or similar device. We reserve the right to deny or terminate service without notice for any misuse or any use that adversely affects network performance." Verizon Wireless and AT&T Mobility currently offer tethering to their plans for a fee.