Polyphonic ringtone formats
There are different types of polyphonic ringtones.

Polyphonic ringtone level 4
The polyphonic level 4 capable phones can play playback 4 simultaneous notes. The Nokia 3510, 3510i, 5100, 6100, 6610, 6800, 7210 and 7250 supports playback for polyphony 4 level ringtones. The instrument bank of the above mentioned Nokia phones include 29 melodic and 14 percussive instruments. The Nokia 6220 supports polyphony level 16.

Polyphonic ringtone level 24
The Nokia 3650, 6600, 7650, 3300 and 6650 have support for polyphony level 24 MIDI content. The instrument bank of the above mentioned Nokia phones include 128 melodic and 47 percussive instruments. To get even better polyphonic ringtone sounds some mobile phones have a built in synthesizers. Phones with synthesizers: Panasonic GD87 and Samsung SGH-T100.

How to download a polyphonic ringtone?
A polyphonic ringtone is downloaded to the mobile phone over MMS or WAP unlike a traditional monophonic ringtone which is downloaded to the phone as a SMS message. Polyphonic tones cannot be sent to other mobile phones. In Europe and the UK you are usually charged for your polyphonic tones download via your mobile phone bill.

In US a polyphonic ringtone is usually paid with a credit card and some ringtone web sites also accept payment by Pay Pal. The payments options depends on the service, operator and plan you use. Nextel, Sprint, Cingular Wireless, T-Mobile and AT&T are the biggest operators in the US. The biggest operators in Europe and UK are O2 / BT Cellnet, T-Mobile / One2One, Orange, Virgin and Vodafone.