Kaber, that's the latest and greatest Apple device! Of Course, the iPhone 5 has the talk to text feature. To enable this feature, you just need to access the home screen:
> tap Messages
> tap option to compose Message
> Tap your contact
> Tap the field to enter the body of your message
> On your keyboard, you will see an icon that resembles a microphone right next to the space bar. When you tap that microphone icon, the voice option will enable on.
I trust that these steps will work for you. ^LH