There is no official Siri App for the iPhone 4. You can download Vlingo or one of several other apps that are voice-controlled, but they don't have the same capabilities as Siri. Plus, you have to open the app first in order to use the voice-control, whereas with Siri you just hold down the home button to activate it...you don't even have to look at the phone.
I don't have Siri...but my husband does...so I know how it operates. *jealous*
__________________  Roxie |