Sony Ericsson Xperia ZL User Guide - Page 122
Locking and protecting your device, IMEI number, SIM card protection
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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 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. 122 This is an Internet version of this publication. © Print only for private use.