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To perform a factory data reset
To avoid permanent damage to your device, do not restart your device while a reset
procedure is underway.
1
From your Home screen, tap .
2
Find and tap Settings > Backup & reset.
3
Tap Factory data reset.
4
If 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.
5
Tap Reset phone.
6
To confirm, tap Erase everything.
Locking and protecting your device
IMEI number
Every phone has a unique IMEI (International Mobile Equipment Identity) number. You
should keep a copy of this number. If your phone is stolen, your network provider can
use your IMEI number to stop the phone from accessing the network in your country.
To view your IMEI number
1
Turn off your device, then remove the battery cover and battery.
2
Look for the 15- to 17-digit number on the label. The first 15 digits represent
the IMEI number.
To view your IMEI number in the phone
1
From your Home screen, tap
.
2
Find and tap Settings > About phone > Status.
3
Scroll to IMEI to view the IMEI number.
SIM card protection
The SIM card lock only protects your subscription. Your device will still work with a
new SIM card. If the SIM card lock is on, you have to enter a PIN (Personal Identity
Number). If you enter your PIN incorrectly more times than the maximum number of
attempts allowed, your SIM card will become blocked. You need to enter your PUK
(Personal Unblocking Key) and then a new PIN. Your PIN, PIN2 and PUK are supplied
by your network operator.
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