Nokia 1600 Guide D'utilisation page 21

M e n u f u n c t i o n s
Composer
Select Menu > Extras > Composer and a tone. You can
create your own ringing tones by keying in the notes.
For example, press 4 for note f. Press 8 to shorten (-)
and 9 to lengthen (+) the duration of the note or rest.
Press 0 to insert a rest, * to set the octave, and # to
make the note sharp (not available for notes e and b).
When the tone is complete, select Options > Play,
Save, Tempo, Send, Clear screen or Exit.
Leaving applications running in the background increases the demand on battery
power and reduces the battery life.
SIM services
Your SIM card may provide additional services that you can access.
This menu is shown only if it is supported by your SIM card. The name
and contents of the menu depend on the SIM card.
For information, contact your service provider.
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