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BT Wi-fi is a global wi-fi hotspot service provided by BT Group in partnership with Fon (No longer in partnership with Fon as of 2020) . It was established following a rebranding of the former BT Openzone and BT Fon, bringing both of the services under one name, until the Fon partnership ended. It supports the BT Consumer division. It is the world's largest wi-fi network  with more than 5 million hotspots in the UK and another 9 million around the world.
- "BT Wi-fi is the new name for BT Openzone and BT Fon". BT Wi-fi. Retrieved 3 February 2016.
- "BT Openzone and BT FON are now known as BT Wi-fi, the world's largest wi-fi network". BT Customer Help. Retrieved 20 November 2016.