No one knows who composed and sung the song Tune Mere Jaana, to make it clear that the emptiness song tune mere jaana song is not sung by Rohan Rathore and It's sung by Gajendra Verma so he released the new song "Phir Suna".
It seems that voice and style is similar as in tune mere jaana.
lot of people still saying that voice is not matching, maybe composition is the reason as its not the same song. It's still not clear but it seems that both songs are sung by Gajendra Verma. (as published on lyricsmint.com)

Read more about Gajendra Verma on Last.fm.