LG P710 User Manual page 45

Call duration – View the duration of calls including last call, dialled calls, received calls
and all calls.
Additional settings – This lets you change the following settings:
Caller ID: Choose whether to display your number on an outgoing call.
Call waiting: If call waiting is activated, the handset will notify you of an incoming call
while you are on the phone (depending on your network provider).
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