Mobile telephone apparatus and method for call divert service

A method for conditional call diverting in a receiving telephone apparatus, comprising:

• switching the receiving telephone apparatus to a desired operating mode;
• receiving an incoming telephone call from a calling telephone apparatus;
• identifying the telephone number of the calling telephone apparatus;
• checking if the telephone number of the calling telephone apparatus is an entry in a phone book of the receiving telephone apparatus;
• and
• if the telephone number of the calling telephone apparatus is an entry in the phone book detecting if the telephone number of the calling telephone apparatus is a member of a first telephone number group associated with the desired operating mode and processing the incoming call as a normal call if the telephone number is a member of the first telephone number group, and diverting the incoming call if the telephone number is not a member of the first telephone number group.