Question: how to set a song as caller tune?
Answer: Download MyJio app from Play Store/App Store. Open MyJio app and select 'JioTunes' option. ... 
Login to JioSaavn App to check out latest releases. Search and select a song of your choice to set as Jio Tune. ... 
To explore JioTunes, SMS JT to 56789. ... 
Press * to copy JioTune.