Simple, I tried the apps from the app store and they don't cut it! Albeit nice attempt! The AT&T voice dial option add on is much better and is the most accurate at true voice regognition I have tried! Seems too cheap at only $5.00 added to my bill. Plus, I have one preset button set up on my D3 head unit that dials in the *86 code and then AT&T takes it from there.