LG G3100 User Manual page 141

You can listen to your voice message(s) and get the voicemail centre
number.
You can call voicemail centre if you want to listen to voice message.
You can get the voicemail if this feature is supported by the network
service provider. When new voicemail is arrived, the symbol will be
displayed on the screen. Please check with your network service
provider for details of their service in order to configure the handset
accordingly.
Press key for 1 a long time in standby mode.
You can check the following submenus.
The number dialed on the home network to listen to voicemail.
The number dialed when other networks to listen to voicemail.
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