COMMUNICATION CONTROL

摘要

Controlling calls in a mobile telephone in which a user is allowed to switch on phone call limitation. A phone call limitation is imposed responsively and phone calls from the mobile telephone are allowed only up to a predetermined limit. After meeting the predetermined limit, placing of new phone calls and continuing of an ongoing phone call is prevented. The predetermined limit is based on call time, costs of a call or calls, or both the time and costs. The mobile telephone itself controls the call time. For cost control, the mobile telephone is configured to instruct its network based charging system to control the costs so that they will not exceed a cost limit. The phone call limitation is input from a user. To authorize the user for entering the call limitation, the user prompted for an authorization code.