ZTE Corporation VDF1231 Manuale Utente

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Vodafone to obtain the PUK code to unlock the SIM card. 
To disable the SIM PIN: 
You have to enter the correct PIN code to disable the use of the PIN code. After it is disabled, 
each time you turn on the phone, you will not be asked to enter the PIN code. 
Select Security > Disable SIM PIN, then enter your PIN. 
To change the SIM PIN: 
When the new SIM PIN is enabled, you must enter this PIN to unlock the phone. 
Select Security > Change SIM PIN. In Old PIN, enter the current PIN. Then enter and confirm 
the new PIN. 
To change PIN2 
Select Security > Change PIN2, enter the current PIN2. Then enter and confirm the new 
PIN2. 
To check the certificates 
Select Security > certificates. You can check the personal/intermediate/root certificates on your 
phone. 
To encrypt files on the MicroSD Card 
Select Encryption > Encrypt files when placed on storage cards to encrypt the files on the 
MicroSD card.