If you are a Vodafone customer, here are the different ways you can activate Caller tunes on your mobile.
You may dial the USSD code *567# or send an SMS as ACT CT to 111 (for Post paid) or 144 (in case of Pre paid).
Or even simpler, you can just dial *9, when you hear a Caller tune when you dial some one. This will activate Call tunes service on your number, as well as set the same song as your caller tune too (you can change this later, if you wish)
Charges for service
Caller tunes service will be chargeable at Rs.30 per month.
In addition, Rs.15 will be charged for every caller tune change. If the song has not been changed for 90 days, Rs.15 will be charged (once every 90 days from the date of last song change)
To select a song, you may have to dial 56789 or SMS to that number, those will be charged at Rs.6/min and Rs.3/sms.
Also see: Airtel Hello tunes.
Deactivating Caller tunes
If you think Caller tunes is not for you, you can deactivate simply by send an SMS to a toll free number:
Type CAN CT to 111 (Post paid)
CAN CT to 144 (Pre paid)