Language troubleshooting
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192
Wireless network coverage
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193
Find information about wireless coverage indicators
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193
Turn off the connection to the wireless network
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193
Turn on wireless coverage notification
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176
About the preferred wireless network list
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193
Add a wireless network to the preferred wireless network list
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193
Change the order of preferred wireless networks
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194
Delete a wireless network from the preferred wireless network list
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194
Turn off data service
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195
About roaming
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195
Switch wireless networks manually
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195
Wireless network coverage troubleshooting
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196
Power, battery, and memory
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197
Turn off your device
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197
Set your device to turn on and turn off automatically
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197
Check the battery power level
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197
Reset the device
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197
Extend battery life
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197
View the amount of available memory on your device
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198
Best practice: Optimizing your device performance
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198
SIM card
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199
About the SIM card phone book
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136
Add a contact to your SIM card
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136
Copy contacts from your SIM card to your address book
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136
Copy a contact from your address book to your SIM card
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136
Change a SIM card contact
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137
Delete a SIM card contact
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137
Store SMS text messages on your SIM card
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57
About SIM card security
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200
Protect your SIM card with a PIN code
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201
Change the SIM card PIN code
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201
Change the display name for a phone number
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201
Security
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203
Security basics
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203
Password keeper
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204
Encryption
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206
Memory cleaning
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208