Here's how to perform a voice search on your BlackBerry Z10.
1. Press and hold the Mute button on the right side of the device.
If using for the first time, tap I Agree for the Voice Control terms and conditions.
Select your language then tap Next, then tap Continue on the next screen.
2. Speak clearly into the microphone, for example: "Send text to..." or "Search for..."
3. The device will then begin a text message to your contact or perform a search for your requested search topic.
4. To use speech to text while creating a text message, press and hold the Full Stop/Microphone key to begin dictation.