Callertune or Hello Tune is a tune that a caller hear from the called mobile phone. It is a selected song, set as caller tune by the user. Callertune or Hello Tune a network service and each carrier have their own codes for activating a specific tune. In India, popular mobile phone service providers such as Airtel, Vodafone and BSNL provide callertunes for rent with monthly basis. (To know the cost, please call your service provider).

With Vodafone Callertunes, you can play your favourite song for all your callers instead of the normal tring tring. If you know your friends' favourite songs, you can also set Callertunes just for them. Choose from Bollywood to International hits, wacky sounds to pure instrumental and more. And if that's not enough, record a message in your own voice and set it as your Callertune.
Vodafone Callertunes Link: http://www.vodafone.in/existingusers/services/pages/callertunes.aspx

Popular songs(Film) and their Callertune numbers:

Pehle Pyar Ka(Papa Kahte Hain) - 10001576
Nahin Ye Ho Nahin Sakta(Barsaat) - 17661
Bheed Mein Tanhai Mein(Tumsa Nahi Dekha) - 12223
Chaha Hai Tujhko(Mann) - 12228
Pehli Nazar Mein(Race) - 15002566
O Rabba(Zamana Deewana) - 16971
Nasha Yeh Pyar Ka Nasha Hai (Mann) - 17392
Khuda Jaane(Bachna Ae Haseeno) - 10003009
Kya Batlayen(Lal Dupatta Malmal Ka) - 20193
Jeeta Tha Jiske Liye(Dilwale) - 12222