BlackBerry 10.3 사용자 설명서

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Unlock your device with a network unlock code
To obtain the unlock codes for your BlackBerry device, contact your service provider.
Your device might be network locked which allows your device to make a mobile network connection with only your current 
service provider. If you plan to travel internationally and you want to use a SIM card from another service provider, you 
might need to enter an unlock code.
Tip: To see the current service provider associated with your device, on the home screen, swipe down from the top of the 
screen. Tap 
 Settings > About. In the Category drop-down list, tap SIM Card.
1.
On the home screen, swipe down from the top of the screen.
2.
Tap 
 Settings > Security and Privacy > SIM Card.
3.
In the Phone Network Lock section, tap a locked item.
4.
When prompted, enter the unlock code.
CAUTION: For security reasons, each unlock code can only be entered incorrectly 10 times. If you exceed the number of 
allowed attempts to enter an unlock code, your SIM card will allow emergency calls only. For assistance, contact your 
service provider.
Change or remove your device password
CAUTION: If you can't remember the password for your BlackBerry device, the only way to change your password or regain 
access to your device is to delete all of your data by completing a security wipe.
If BlackBerry Balance technology is set up on your device, depending on the rules set by your administrator, you might not 
be able to remove the password for your device.
1.
On the home screen, swipe down from the top of the screen.
2.
Tap 
 Settings > Security and Privacy > Device Password > Change Device Password.
To stop using a password, turn off the Device Password switch.
Related information
How do I reset my device password if I forget it?
Your BlackBerry device password can't be recovered or changed if you don't enter your current password correctly. For 
security reasons, the only way that you can reset your password without knowing your current password is to delete all of 
your device data. You can do this by entering an incorrect device password multiple times.
BlackBerry recommends that you regularly create and save a backup file on your computer.
User Guide
Security and backup
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