Check that you have not turned off the sound from the application settings menu. Check that your device is not in silent mode.
- Why are the app notifications coming late on my Lumia phone?
- How do I share videos during a call using the Messaging+ application on Lumia phone?
- What is the Messaging+ application on my Lumia?
- What is visual voicemail and where to find it on my Lumia?
- Why do text messages with smileys from my Lumia to certain contacts appear as blank space or boxes?