Locking And Protecting Your Device - Sony Xperia M dual User Manual

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 Drag the status bar downwards, then tap
2 Find and tap Backup & reset> Factory data reset.
3
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.
4 Tap Reset phone.
5 To 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
• Turn off your device, then remove the battery cover and battery to view your IMEI
number.
• Open the phone dialer on your device and enter *#06#*.
To view your IMEI number in the device
1 From your Home screen, tap
2 Find and tap Settings > About phone > Status.
3 Tap IMEI information.
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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