Yahoo! oneSearch with voice is to be supported on carriers in Australia, the USA, the UK, Canada, India, Indonesia, the Philippines, Singapore, Germany, and Spain for the following devices:

• BlackBerry 8800 series
• BlackBerry Bold (9000)
  Note: On certain BlackBerry Bold devices, those with operating system versions prior to 4.6.0.190, you can't use the browser to select the Set Location box. Instead, specify your search location by typing or speaking it as part of the query—for example. "weather Boston" or "weather 02116".
• BlackBerry Curve (8300 series)
• BlackBerry Curve (8900 series)
  Note: Some T-Mobile users have reported connection issues. Setting the connection type to BIS in the connection settings solves the issue.
• BlackBerry Pearl (8100 series)
• BlackBerry Pearl Flip
• BlackBerry Storm (9500, 9530)