Sony CMD-CD5 Operating Instructions Manual page 19

Example:
To enter "S"
Press
Note
Phonebook memory size (number of memory spaces and maximum number of
letters and digits) depends on your SIM card, however, names longer than 16
characters cannot be fully displayed.
n Rotate the Jog Dial
to "S"
+
–
b
n Press the Jog Dial
(or wait for a moment)
b
GB
19