LG KG120 User Manual page 235

KG120 features
Note
]
The quality of the conversation may change depending
on network coverage. When the signal strength is below
2 bars, you may experience muting, call drop and poor
audio. Please refer to this signal as indicator for your
calls. When there are no bars, that means that there is no
network coverage: in this case, you won's be able to
access the network for any service
(call, messages and so on).
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