Zte R550 Quick Start Manual page 19

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6. Flight mode
In the "phone setting"-"fight mode"Choose the Flight Mode or Normal mode .
7. Misc.settings
Set the time limit for the back light of main screen to be off when there is no
operation.
Security settings
SIM security:
Asked to enter the SIM card PIN code.After entering the correct before setting.
If the SIM card is set to ON, each time you boot, you need to enter the PIN
code, when entered incorrectly three times, it is required to enter your PUK
(Personal Unblocking Key). PUK code is used to unlock and change the
locked PIN code. If the PUK code is not provided or is lost, please contact your
network operator.
Mobile Security Settings:
Use the phone lock operation,enter the password when opening or closing
operation of the phone lock when the phone is turned off, you will be asked to
enter the phone password at boot time. Phone password is 4 to 8 digits. The
default password is "1122".
change the password.

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