©2000 Nokia Mobile Phones. All rights reserved. 73Menu functions• change the ‘Security level’ setting (Menu 4-5-5).Call duration (Menu 2-5)This function allows you to view the duration of your incoming and outgoing calls in hours, minutesand seconds. You can also (by first entering the security code) clear the call timers. See ’Access codes’on page 122.Note: The actual time invoiced for calls by your service provider may vary, depending uponnetwork features, rounding-off for billing, and so forth.Call costs (Menu 2-6)This network service allows you to check the cost of your last call or all calls. The call costs are shownseparately for each SIM card.You can limit the costs of your calls to a certain amount of charging unitsor units of currency by using the option Call cost limit. You can make and receive charged calls as longas the specified cost limit is not exceeded. The number of remaining units is shown in the standbymode. You may need the PIN2 code to set the cost limit.You can set the phone to show the remainingtalk-time (cost limit) in terms of charging units or units of currency by using the option Show cost. Youmay need the PIN2 code to select the currency or unit. Contact your service provider for charging unitprices.The option Clear counters allows you to reset the call cost counters. To clear the counters youneed the PIN2 code. See ’Access codes’ on page 122.Note: When no more charging or currency units are left, only calls to the emergencynumber programmed into your phone (e.g. 112 or other official number) may be possible.The actual time invoiced for calls by your service provider may vary, depending uponnetwork features, rounding-off for billing, and so forth.