Zte F260 User Manual page 36

Change the Backlight Duration
Reducing the backlight duration to 10 seconds can improve battery life
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From the Idle Screen press the OK Key for the Main Menu.
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Press the Down Arrow key then the Left Arrow key for Settings, press OK
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Scroll down or press 2 directly for Backlight duration
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Set the desired time out for the backlight
Disable or change the PIN Number
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From the idle screen press the OK key for the main menu
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Press the Down Arrow key then the Left Arrow key for Settings, Press OK
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Press the Right Arrow key three times for Security
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Press OK to Select Activate security codes
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Press OK to Select PIN code
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Switch ON or OFF and enter the PIN number to confirm
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To change the PIN Number select Change Security Codes
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Press OK to Select PIN code
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