Settings129› Mobile networks● Use packet data: Set to use data connections on anymobile network.● Data roaming: Set to use data connections when you areroaming.● Access Point Names: Select an access point name (APN) formobile networks. You can add or edit APNs. To reset yourAPN settings to the factory defaults, press the Option keyand select Reset to default.● Network mode: Select a network type.● Network operators:- Search networks: Search for and select a network.- Select automatically: Set the device to select the firstavailable network.SoundChange the settings for various sounds on your device.● Silent mode: Activate Silent mode to make your devicevibrate or mute all sounds, except for media sounds andalarm ringtones.● Volume: Adjust the volume for various sounds on yourdevice.● Device ringtone: Select a ringtone to alert you to incomingcalls.● Default notifications: Select a ringtone to alert you toevents, such as new messages and missed calls.● Sound and vibration: Set the device to vibrate and play aringtone for incoming calls.