Siemens U15 사용자 설명서

Press the upper or lower volume keys to:

increase and decrease earpiece or speakerphone 

volume during a call

increase and decrease the ringer volume setting when 

the idle display is visible

turn off an incoming call alert

This section describes basic calling features. To make video 

calls, see page 50. For more features, see page 57. 

To call a number, your phone must:

be turned on with the phone and keypad unlocked

have a SIM card inserted and unlocked

have a network connection with adequate signal strength

You can make an emergency call even when the phone is 

locked, or when a SIM card is not inserted. See page 60.

keypad keys

dial the phone number (up to 

32 digits)

If you make a mistake, 

press 

(

+

) to delete 

the last digit, or press and hold 

(

+

) to clear all digits.

N

 (send key)

make the call

O

 (end key)

end the call