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Check the battery power level.................................................................................................................................................................................................................. 253
Extend battery life...................................................................................................................................................................................................................................... 253
Format the device memory or a media card........................................................................................................................................................................................... 254
View the amount of available memory.................................................................................................................................................................................................... 254
Best practice: Conserving memory on your device................................................................................................................................................................................ 254
The application memory on my device is low......................................................................................................................................................................................... 255
SIM card...................................................................................................................................................................................................................................................... 256
About the SIM card phone book............................................................................................................................................................................................................... 256
Add a contact to your SIM card................................................................................................................................................................................................................ 256
Copy contacts from your SIM card to your contact list......................................................................................................................................................................... 256
Copy a contact from your contact list to your SIM card........................................................................................................................................................................ 256
Change a SIM card contact...................................................................................................................................................................................................................... 257
Delete a SIM card contact........................................................................................................................................................................................................................ 257
Store SMS text messages on your SIM card........................................................................................................................................................................................... 257
About SIM card security............................................................................................................................................................................................................................ 258
Protect your SIM card with a PIN code................................................................................................................................................................................................... 258
Change the SIM card PIN code................................................................................................................................................................................................................ 258
Change the display name for a phone number...................................................................................................................................................................................... 258
Security........................................................................................................................................................................................................................................................ 259
Security basics............................................................................................................................................................................................................................................ 259
Password keeper........................................................................................................................................................................................................................................ 261
Encryption................................................................................................................................................................................................................................................... 263
Memory cleaning........................................................................................................................................................................................................................................ 266
Certificates.................................................................................................................................................................................................................................................. 267
PGP keys..................................................................................................................................................................................................................................................... 275
Certificate servers...................................................................................................................................................................................................................................... 281
Key stores.................................................................................................................................................................................................................................................... 283
Smart cards................................................................................................................................................................................................................................................. 286
Software tokens.......................................................................................................................................................................................................................................... 290
VPN settings............................................................................................................................................................................................................................................... 291
About security self-tests............................................................................................................................................................................................................................ 292
Verify security software............................................................................................................................................................................................................................. 292
Third-party application control................................................................................................................................................................................................................ 292
Troubleshooting: Security......................................................................................................................................................................................................................... 296
Service books and diagnostic reports...................................................................................................................................................................................................... 298
Service books.............................................................................................................................................................................................................................................. 298
Diagnostic reports...................................................................................................................................................................................................................................... 299
Wi-Fi diagnostic reports............................................................................................................................................................................................................................ 301