About Ring Tones

Whereas older telephones simply used a pair of bells for the ringer, modern ringtones have become extremely diverse, leading to phone personalization and customization. Newer mobile phones allow the users to associate different ringtones for different phonebook entries. Many also allow users to create their own music tones, either with a "melody composer" or a sample/loop arranger (such as the MusicDJ in many Sony Ericsson phones). Often these are native formats only available to one particular phone model or brand. However, other formats, such as MIDI or MP3, are often supported; they must be downloaded to the phone before they can be used as a normal ringtone. Commercial ringtones take advantage of this functionality, which has led to the success of the mobile music industry. The latest innovation in this area is the singtone, a type of karaoke ring tone where a user’s voice recording is adjusted to be both in time and in tune and mixed with a backing track to make a user-created ringtone. An alternative to a ring tone for mobile phones is a vibrating alert. It may be useful:
In noisy environments
In places where ring tone noise would be disturbing
For the hearing impaired

Criticism
Ring tone advertising campaigns have become hugely popular, though they have also attracted a great deal of criticism. For example, in May 2005 Jamster! bought 73,716 spots across all TV channels for the Crazy Frog advertisements, which were shown so often that many came to find Crazy Frog very irritating.[2]. It should be noted that Southern Rapper Chamillionaire was the first to have a ring tone go 3x Platinum for the hit single "Ridin". He now has his own category on certain phones