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, * set
the octave, and # to make the note sharp (not available for
notes e and b).
When the tone is complete, select
Leaving applications running in the background increases the
demand on battery power and reduces the battery life.