
To take full advantage of Voice Control on the iPhone, it’s helpful to know all of the commands at your disposal. Below is a list of all voice commands for the iPhone.
Call Commands

Corrections
Apple describes these commands as used to “make a correction.” However, I’ve only found them to be able to cancel Voice Control after a secondary prompt, such as when it asks, “Home or Mobile?”

iPod Controls

Cancel Voice Control
Cancels (closes) Voice Control.

Other Info
To activate Voice Control, you can either hold down the iPhone home button or hold down the button on the iPhone headphones. For the best results, speak clearly with a slight pause between each command and use full names for contacts.
The default language for Voice Control is the same as in the iPhone general settings (General –> International –> Language Setting). If you would like to command Voice Control in a different language and impress your friends, you can change it in Settings –> General –> International –> Voice Control.
Voice Control works even when the iPhone is passcode locked. To change this, go to Settings and navigate to General –> Passcode Lock and turn Voice Dial off.
You can say “eight hundred” for phone numbers that contain “800.” This only works with the number 800, a common toll-free number. For all other phone numbers, you’ll have to speak each digit, as in “seven zero zero” for 700.
Be sure to check out more of our posts on iPhone Basics.

#1 by Sean on July 5th, 2009
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The 3.0 OS upgrade for the iPhone 3G does not seem to have Voice Control. Is this feature instrument specific to the “S” or am I missing something?
#2 by Alan on July 5th, 2009
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Voice Control is only for the iPhone 3GS. It doesn’t work for 3G–its processor isnt fast enough.
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#3 by Wayne on August 7th, 2009
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“It doesn’t work for 3G–its processor isnt fast enough.” Sounds like Bull to me since there are plenty of app on the 3G using voice. Why does Google’s App, Say, Who etc. all use voice just fine on the 3G?
Seems Apple is holding back on a voice support for the 3G just so they can market 3GS with a new feature.
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#4 by brian on September 4th, 2009
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does it work with other mobile..i gt samsung tocco lite..came with crap earphones n has no adapter for 3mm jack