Samsung SGH-I747RWAATT - Manual (Page 136)

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Tip: Make sure your battery is charged more than 80 percent.
Encryption may take an hour or more.
Set up/change password
Use this option to set up your password when one is first
required or change your current password.
1. From the Home screen, tap ➔ Settings ➔ Security
and lock screen ➔ Set up/change password.
2. Enter a new password and tap Confirm.
3. Enter the new password again and tap Confirm.
Set up SIM card lock
Prevent another user from using your SIM card to make
unauthorized calls or from accessing information stored on
your SIM card by protecting the information using a PIN code.
When enabled, your phone will ask for a PIN number each
time you use the phone. Using this option you can also
change your SIM PIN number.
1. From the Home screen, tap ➔ Settings ➔ Security
and lock screen.
2. Tap Set up SIM card lock.
3. Tap Lock SIM card, enter your SIM PIN code, then tap
OK.
Note: You must activate Lock SIM card before you can change
your SIM PIN code.
4. Tap Change SIM PIN.
5. Enter your old SIM PIN code and tap OK.
6. Enter your new SIM PIN code and tap OK.
7. Re-type your new SIM PIN code and tap OK.
Make passwords visible
When enabled, password characters display briefly as you
touch them while entering passwords.
1. From the Home screen, tap ➔ Settings ➔ Security
and lock screen.
2. Tap Make passwords visible to create a checkmark and
enable or disable the display of password characters.