Nokia 5190 Owner's Manual page 53

Setting timers back to 0
Use 0HQX 3 5 4 to clear digital call timers. You will be
required to enter your security code.
Displaying the current call timer during calls
1 Press 0HQX 3 5 1.
2 Press 'HWDLOV .
3 Press 6HOHFW .
4 Scroll to 2Q , then press 2. .
During a call, the amount of time spent in that call will be
displayed.
Note: The actual time invoiced for calls by your service
provider may vary, depending upon network features,
rounding-off for billing, and so forth.
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