Nokia Lumia 1520 User Manual page 109

• Reset your phone. This restores the factory settings, and erases all your personal content,
including apps you've purchased and downloaded. On the start screen, swipe down from the top
of the screen, and tap ALL SETTINGS > about > reset your phone.
If your issue remains unsolved, contact your network service provider or Microsoft Mobile for repair
options. Before sending your phone for repair, always back up your data, as all personal data in your
phone may be deleted.
Tip: If you need to identify your phone, to view the unique IMEI number of the phone, dial
*#06#.
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