This is a test of commonsense. Complete the next sentence:

How to have siri read your text messages 
Start siri. 
Siri can read back your unread messages just by using voice commands. There are a couple of ways to start siri : 
Press and hold the home button until siri starts.
Say " hey siri " to start siri. This requires ios 9 or later, and the " hey siri " feature enabled in the settings app.