A service allowing the recipient to log malicious calls
This is a service that can be activated by the Operator for subscribers that complain that they are the recipients of malicious or abusive incoming calls. Once activated for their subscription, the user can activate the service during or shortly after the call, by pressing a specified key on their phone. This will cause the service to log the Calling Line identity (CLI) with the date/time of the call.
The appropriate authorities can then use the information as necessary.
Enhancement possibilities: Recording of such calls, black-listing of the CLI.