Sony Ericsson K220 - Manual (Page 7)

7
To set the phone to silent
Press and hold
.
To lock or unlock the keypad
• To avoid dialling a number by accident, press and
select Lock keys .
• To unlock the keypad, press and select Unlock .
% 48 Keypad lock for more information.
To turn the screen light on
Press any key to turn the screen light on.
SIM card
When you register as a subscriber with a network operator,
you get a SIM (Subscriber Identity Module) card. The SIM
card keeps track of your phone number, the services
included in your subscription, and your contact information,
among other things.
If you have been using a SIM card in another phone,
make sure that your information is saved to the SIM
card before you remove it from the other phone.
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