Instead of using ringtones composed by other persons, how do I compose my own?

Question: Instead of using ringtones composed by other persons, how do I compose my own?

Answer: There is some software available for that purpose. Nokring, for example, is one well-known Nokia ringtones composer. For more on available software, see my ringtones page specific to your phone brand, or visit one of the Top GSM sites who feature several links to different pieces of software that can be used for composing ringtones.