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

Accessibility options

303

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