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Check the battery power level.................................................................................................................................................................................................................. 252
Extend battery life...................................................................................................................................................................................................................................... 252
Format the device memory or a media card........................................................................................................................................................................................... 253
View the amount of available memory.................................................................................................................................................................................................... 253
Best practice: Conserving memory on your device................................................................................................................................................................................ 253
The application memory on my device is low......................................................................................................................................................................................... 254
SIM card...................................................................................................................................................................................................................................................... 255
About the SIM card phone book............................................................................................................................................................................................................... 255
Add a contact to your SIM card................................................................................................................................................................................................................ 255
Copy contacts from your SIM card to your contact list......................................................................................................................................................................... 255
Copy a contact from your contact list to your SIM card........................................................................................................................................................................ 255
Change a SIM card contact...................................................................................................................................................................................................................... 256
Delete a SIM card contact........................................................................................................................................................................................................................ 256
Store SMS text messages on your SIM card........................................................................................................................................................................................... 256
About SIM card security............................................................................................................................................................................................................................ 257
Protect your SIM card with a PIN code................................................................................................................................................................................................... 257
Change the SIM card PIN code................................................................................................................................................................................................................ 257
Change the display name for a phone number...................................................................................................................................................................................... 257
Security........................................................................................................................................................................................................................................................ 258
Security basics............................................................................................................................................................................................................................................ 258
Password keeper........................................................................................................................................................................................................................................ 260
Encryption................................................................................................................................................................................................................................................... 262
Memory cleaning........................................................................................................................................................................................................................................ 265
Certificates.................................................................................................................................................................................................................................................. 266
PGP keys..................................................................................................................................................................................................................................................... 274
Certificate servers...................................................................................................................................................................................................................................... 280
Key stores.................................................................................................................................................................................................................................................... 282
Smart cards................................................................................................................................................................................................................................................. 285
Software tokens.......................................................................................................................................................................................................................................... 289
VPN settings............................................................................................................................................................................................................................................... 290
About security self-tests............................................................................................................................................................................................................................ 291
Verify security software............................................................................................................................................................................................................................. 291
Third-party application control................................................................................................................................................................................................................ 291
Troubleshooting: Security......................................................................................................................................................................................................................... 295
Service books and diagnostic reports...................................................................................................................................................................................................... 297
Service books.............................................................................................................................................................................................................................................. 297
Diagnostic reports...................................................................................................................................................................................................................................... 298
Wi-Fi diagnostic reports............................................................................................................................................................................................................................ 300