The ringback service plays a user-selected song to the caller, instead of the traditional ringing tone. Branded "Caller Tunes" by Telecom New Zealand, the service currently lists over 100,000 songs, sounds and impersonations available for users to choose from.

Dave Dobbyn’s Kiwi classic ‘Slice of Heaven’ is New Zealand’s most popular Caller Tune, closely followed by UB40’s ‘Red, Red Wine’.

This week Telecom is adding to the selection and launching a new range of Christmas songs and themes, including seasonal favourites such as ‘Away in a Manger’ and ‘Jingle Bells’, through to Christmas themed Simpsons’ and Ali G impersonations. Other new content is added on a regular basis.

The current Top Ten Caller Tunes are:

1. Slice of Heaven - Dave Dobbyn
2. Red Red Wine - UB40
3. Beautiful - Snoop Dogg
4. Austin Powers
5. Intoxicated
6. Ali G
7. Freestyler - Bomfunk MCs
8. Take Me Out - Franz Ferdinand
9. Slow Jamz – Twista
10. Superstar - Jamelia