LG G4020 - Manual (Page 78)

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All Calls (Menu 6.5.4)
Total length of all calls made and incoming calls since the timer was last
reset.
Call Costs Menu 6.6
Call costs allows you to check the cost of the last call or all calls. The call
costs are displayed separately for each SIM card. To reset the cost, you
need the PIN2 code.
The following options are available:
Last Call’s Cost (Menu 6.6.1)
Cost of the last call made.
All Calls’ Cost (Menu 6.6.2)
Total cost of all calls made since the cost counter was last reset. If the total
cost exceeds the maximum cost set, you will no longer be able to make any
calls, except calls to the emergency services, until you reset the counter.
Notice The actual time invoiced for calls by your service provider may vary,
depending upon network features, rounding-off for billing, and so
forth.
Recent Calls
Notice The actual cost invoiced for calls by your service provider may vary,
depending upon network features, rounding-off for billing, tax, and
so forth.
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* : Shown only if supported by SIM card