The Nexus One (codenamed 'HTC Passion^') is Google's flagship smartphone manufactured by Taiwan's HTC Corporation. It became available on January 5, 2010 and uses the Android open source mobile operating system. Features of the phone include the ability to transcribe voice to text, noise canceling dual microphones, and GPS guided turn-by-turn voice directions to drivers.
The device is sold unlocked (not restricted to use on a single network provider). Google offered T-Mobile and AT&T versions of the phone online in the United States before closing the online store in July 2010. A version for use on Vodafone (European) networks was announced on 26 April 2010, available in the UK on 30 April 2010.^[13] On March 16, 2010, the Nexus One device became available on the Google web store for sale in Canada for use with Rogers Wireless, Telus, Bell, Videotron and Wind Mobile.^[14] In May 2010 Google announced the closing of the web store, with the intention to distribute the phone through partners around the world.
Apple is targeting the Nexus One in a patent lawsuit against HTC.