ZTE Blade L3 - Manual (Page 47)

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1. Press Home key > tap > Settings >
Security > Set up SIM card lock.
2. Tick the Lock SIM card check box.
3. Enter the PIN you’ve been given and tap
OK.
TIPS: If you enter the wrong SIM PIN more
times than allowed, your SIM card will be
locked and you cannot access the mobile
phone network. Contact your operator for a PIN
Unlock Key (PUK) to restore the SIM card.
Changing Your SIM PIN
You can change the PIN you’ve been given to
one easier for you to remember and harder for
others to guess.
1. Press
Home key > tap > Settings >
Security > Set up SIM card lock.
2. Make sure you already tick the Lock SIM
card check box.
3. Tap Change SIM PIN.
Setting up Credential Storage
This lets you select applications to access
secure certificates and other credentials.
Deleting Secure Credentials
1. Press
Home Key > tap > Settings >
Security.
2. Tap Clear credentials to clear credentials.