LG G5310 - Manuel (Page 164)

ENGLISH
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Accessing the Menu
Manual
The phone will find the list of available networks and show you them.
Then you can select the network which you want to use if this
network has a roaming agreement with your home network operator.
Preferred
You can set a list of preferred networks the handset should attempt
to register with first, before attempting to register to any other
networks. This list is created from the handset’s predefined list of
known networks.
User define
You can add entries or delete new ones from the network list.
This can even include new networks whose network codes are not
known to the handset. To do this, select and then enter the network
code, country code and network name.
Reset settings [Menu 4-7]
You can set the handset to the default configuration by selecting this
menu. In addition, you need Security code to activate this function.