The iPhone doesn't have a lot of voice control commands, but like most computer programs it's very picky about you getting the wording just right. I've compiled all the English voice control commands into a printable document that will fold neatly in half and fit in your iPhone pouch so it's handy while you're still learning the commands.
I also have a complete list of all the iPhone and iPod Touch Voice Commands and their functions. This list is briefer and doesn't have explanations for those commands where the function is obvious - it just lists the command name to jog your memory.
Updated for iOS 4!
There are only a few small differences between the iPhone OS 3.2 commands and the new iOS 4 or iPhone 4 commands, but all the cheat sheets have been updated to reflect the changes.
I'm making a PDF available for easy printing, and a version in Pages '08 format for those who might want to edit it for themselves. I've also created versions in both A4 and US Letter page sizes, which should cover everybody's standard page sizes.
Voice Command Cheat Sheets for iOS 4 
- iPhone/iPod Touch Voice Commands Cheat Sheet, US Letter Size, PDF
- iPhone/iPod Touch Voice Commands Cheat Sheet, A4 Size, PDF
- iPhone/iPod Touch Voice Commands Cheat Sheet, US Letter Size, Pages '08 Format
- iPhone/iPod Touch Voice Commands Cheat Sheet, A4 Size, Pages '08 Format
Voice Command Cheat Sheets for iPhone OS 3.2
- iPhone Voice Commands Cheat Sheet, US Letter size, PDF
- iPhone Voice Commands Cheat Sheet, A4 size, PDF
- iPhone Voice Commands Cheat Sheet, US Letter size, Pages '08 Format
- iPhone Voice Commands Cheat Sheet, A4 size, Pages '08 Format
Oh, and because it has to be small to fold in half and fit in your iPhone case I put two on the same page. You can give the other one to a friend!
You can find more free downloadable cheat sheets and more on the Free Downloads page - go take a look.
- Ricky
