1. Find "Touch ID & Passcode"
Press Settings.
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Press Touch ID & Passcode.
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2. Turn on use of phone lock code
Press Turn Passcode On and key in a phone lock code of your own choice twice.
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3. Turn deletion of data on or off
Press the indicator next to "Erase Data" to turn on the function.
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Press Enable.
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4. Turn off use of phone lock code
Press Turn Passcode Off and key in the phone lock code.
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5. Return to the home screen
Press the Home key to return to the home screen.
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