[header] How to have siri read your text messages [title] Start siri. [step] Siri can read back your unread messages just by using voice commands. There are a couple of ways to start siri : [substeps] 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.