Many cell phones have a Ringtone Composer that lets you input a new ringtone only by typing a series of keys in order to get a melody. Here is how to use that Ringtone Composer:

1. Make sure that your phone has a ringtone composer, also called "melody composer". Not all phones have a ringtone composer!
2. Go to your phone's Ringtone Composer. It is usually found in "Settings" or "Tone Settings". For exact instructions for your phone, consult your owner's manual on the manufacturer's web site.
3. Press "New Tone" or "My Melodies", then "Edit", to edit the current melody (may not be required with some phones - just selecting "New Tone" may automatically put you in the edit mode in your ringtone composer)
4. Now, you need to get a "keypress sequence" compatible with your ringtone composer for the melody you want.
5. Start typing the keypress sequence into your ringtone composer exactly as shown (see comments below).
6. Once done, press the "ok" or "done" key in your ringtone composer and follow the instructions. Your ringtone composer should let you name, listen to and save your new ringtone. Your ringtone composer may even let you adjust the tempo.
7. Your new melody will be listed with your other ringtones. To use it, associate it with a caller group or make it the default ringtone. You should find these options under "Profiles" (for Nokia phones) or "Tone settings".
8. Deleting a previously entered ringtone is usually best done by editing the ringtone in your ringtone composer and replacing the notes with a new melody.

Tips:

1. The numbers shown in keypress sequences are NOT what you should see on your phone's ringtone composer display, they are just the actual keys that you must press in order to get the right melody. The resulting display should be different.
2. Many users ask "how do I input the spaces?". Answer: the spaces are not meant to input in your ringtone composer, they are just there to visually separate notes for easier reading.
3. If you see something like "(5x3)", it just means that you must type "3" five times in your ringtone composer... do not type the parenthesis or the "x".