11
Security 276
Protecting your phone with a screen lock ......................................................... 276
Changing your screen lock ........................................................................................ 277
Settings 278
Settings on your phone ............................................................................................... 278
Changing display settings ..........................................................................................280
Changing sound settings ............................................................................................ 282
Changing the phone language ................................................................................284
Optimizing your phone’s battery life ....................................................................284
Managing memory .........................................................................................................285
Checking information about your phone ........................................................... 287
Backup, update and reset 288
Backing up your contacts ..........................................................................................288
Updating the phone software ..................................................................................289
Restarting or factory resetting your phone ......................................................290
Trademarks and copyrights 292
Index 294
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