Nokia RM-375 User Manual page 56

Security
To set the security settings for your device, select Menu >
Settings > Security > Phone lock, Allowed number when
lock active, Change lock code, Call restrictions, or Voice
privacy.
When calls are restricted, calls may be possible to the
offical emergency number programmed into your device.
Network
The Network menu allows you to customise how your
device chooses which network to operate in while you are
within or away from your primary or home network. Your
device is set to search for the most effective network.
To set which network to use when the device cannot find
a preferred network, select Menu > Settings > Network >
Set Mode, and from the available options.
To access other network settings, select Menu > Settings
> Network > Band select. The available options depend on
your service provider. For more information, contact your
service provider.
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