@toqueparacelular
One of the easiest and quickest ways to get a ringtone is to simply download it from an online. These websites are a great source of high-quality, free ringtones and other smartphone content. Most of these sites offer a wide variety of ringtones in the m4a, m4r, mp3 and mdi formats and you can easily download them to your device or personal computer.
Some mobile devices come with a melody composer, which lets you type in a ringtone directly into the phone's keyboard. Some devices have a preset list of sequences, and some let you create your own by pressing buttons in composer