Question: why jio tune not set?
Answer: If you are unable to find the 'Set As JioTunes' button in your Jiosaavn app, then your app needs to be upgraded to the latest version by visiting AppStore/Google Play. All songs available as JioTunes will have 'Set As JioTune' button enabled. Other ways to search & set your JioTune : Set JioTune using MyJio app.