Sony 1273-5759 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

•

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

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

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.

123

This is an Internet version of this publication. © Print only for private use.