Sony Ericsson P910 用户手册

The device lock protects your P900 and the data in it against 
unauthorized use. 

If the device lock is set to 

, it means that the 

P900 is not normally locked. However, if the SIM has been 
changed, the P900 asks you to enter the code to unlock the P900 
before you can use it. This means that if someone steals your 
P900 and puts another SIM card into it, they will not be able to 
use it.

Note Your operator can block your SIM, if you report that your 
phone has been stolen.

The device lock is not on when you buy your P900. You can 
change the device lock code to any four to eight digit personal 
code.

The default device lock code is 0000.

1. Select 

2. Select a lock option.

3. Select 

.

You can choose to have the P900 locked every time you turn it 
on, locked when the SIM card has been changed, or unlocked.

It is also possible to use the device lock in combination with the 
screen saver. Just mark the checkbox 

 to have the device lock 

activated when the screen saver goes on.

Note When using the screen saving device lock, make sure you 
have set the device lock to activate at Power on. Otherwise your 
P900 will be unprotected after Power on, until the screen saver 
goes on.

1. Select 

2. Select Change Codes.

3. Select the code you want to change. 

4. First enter the old code, then the new one. (To ensure that 

you have typed the new code correctly you have to enter it   
twice.)