3 Easy Steps
There are just three easy steps to start downloading your ringtones. First you choose your cell phone carrier (Sprint, Verizon Wireless, ATT/Cingular, T-Mobile, Alltel, Nextel, CellularOne, Dobson, Boost, or Other. Second you enter in your cell phone number so a pin can be sent to your phone. And finally, just confirm the pin that you will receive and you are ready to download your favorite ringtone.

Types of Ringtones :
Monophonic Ringtones are the simplest form of ringtones. They were used in earlier phones, although most new phones still support them, and play one tune at a time.
Polyphonic Ringtones are a more complex form of ringtone and can play 40 notes and up to 24 different types of insturments at a time. They sound like real music without lyrics.
Real Music Ringtones aka Full Music are the most complex and the highest quality of ringtones and play in the form of MP3, WAV, QCP or AMR.

You will want to check your cellphone to see what types of ringtones are compatible it. The newer phones usually offer more types than the older models.