To perform a factory data reset
To avoid permanent damage to your device, do not restart your device while a reset procedure
is underway.
1Drag the status bar downwards, then tap .
2Find and tap Backup & reset> Factory data reset.
3If you also want to erase data such as pictures and music, which is saved to
your device's internal storage, mark the Erase internal storage checkbox.
4Tap Reset phone.
5To confirm, tap Erase everything.
Locking and protecting your device

IMEI number

Every device has a unique IMEI (International Mobile Equipment Identity) number.
You should keep a copy of this number. If your device is stolen, your network
provider can use your IMEI number to stop the device from accessing the network in
your country.
To view your IMEI number
•Remove the cover to view your IMEI number.
•Open the phone dialer on your device and enter *#06#*.
To view your IMEI number in the device
1From your Home screen, tap .
2Find and tap Settings > About phone > Status.
3Scroll to IMEI to view the IMEI number.

SIM card protection

You can lock and unlock each SIM card that you use in your device with a PIN
(Personal Identity Number). When a SIM card is locked, the subscription linked to the
card is protected.
If you enter the PIN incorrectly more times than the maximum number of attempts
allowed, your SIM card will become blocked. You then need to enter your PUK
(Personal Unblocking Key) and a new PIN. Your PIN and PUK are supplied by your
network operator.
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