By locking the screen, you can help prevent your BlackBerry device from sending accidental messages or pocket dialing. Locking the screen doesn't disable notifications for incoming calls or messages.
Looking for a simple way to help protect your BlackBerry device data and prevent unauthorized use of your device? You can set a device password so that you can lock your device when it's in open view or not in use.
To turn on the picture password, you need to first set a device password. A device password is also needed in case you forget your picture password, or if you need to enter a password to access your BlackBerry device from a computer.
If your device uses BlackBerry Balance technology, in your Balance settings, make sure that you turned off Use as my device password.
Rather than type a password to unlock your device, you can use a secret picture and number gesture and unlock your device with one hand. Choose a picture, a number, and set up the combination. The number of combinations is nearly endless!
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 micro SIM card from another service provider, you might need to enter an unlock code.