Question: how to set caller tune in jio sim in iphone?
Answer: Send an SMS with the first 3 words of the song/film/album of your choice to 56789 (toll-free).
You will receive an SMS with the list of songs matching to your input along with instructions on how to set the song of your choice as your JioTune.
Alternatively, you can SMS “JT” to 56789 and follow the instructions.