HTC Windows Phone 8S User Manual page 27

27 Your first week with your new phone
6. Make sure the Play audio confirmations switch is turned on. This makes your
phone speak aloud to inform you of incoming phone calls.
7. To make your phone read text messages to you, tap the Read aloud incoming
text messages box. Choose whether you want your phone to read text
messages all the time, or only when you're using a Bluetooth or wired headset.