Sociolatte

Siri is the voiced based personal assistant available on almost all Apple products. If you get yourself an iPhone 5 you would need to turn on, activate or enable Siri -- before you can start asking questions. Once Siri is activated on your device, you can then have a lot of fun with this your one voiced-based-personal-assistant. You can ask Siri about the weather, which movies to watch over the weekend, driving directions and the possibility is limitless. Siri does not come turned on in auto mode, you would need to follow the below steps to set it up. On your iPhone 5 you can turn Siri on and off as you choose. One very handy time to have Siri is when you're driving. This way you can just speak your search request and Siri will answer you. How to activate Siri on iPhone 5.

How to activate, setup or configure Siri on the iPhone 5
All you need to do is to go to Settings > General > Siri. Repeat the process to turn Siri on or off.

Now that you have Siri setup, how to ask or use Siri.
Hold down the home button till you hear two quick beeps. A microphone icon will light up and you should see the question 'What can I help you with?' on your home screen. Tap on the microphone icon to begin speaking. If you have your headphones on you would need to hold the center button to talk to Siri. To use Siri with Bluetooth hold the call button to bring up Siri.

How to troubleshoot if Siri is not found under the settings option.
Try setting your region format to US. This is if you're in another part of the world. Siri will get turned on and you can begin using.