Abstract: A telephone number is automatically adjusted in the context a business card or other telephone number exchange. The country code, area code, or other prefix portion is added, removed, or modified based on a location associated with the telephone number and/or a location associated with the recipient. In one example, a sending device looks up location information by contacting the service provider, using locally-stored information, or otherwise, and, based on this information, includes au appropriate prefix. The sending device can also use a location associated with the recipient in determining an appropriate prefix or adjusting a received prefix, for example, based on the recipient's own telephone number. Adjustments to telephone numbers can also be made by recipient devices, intermediary devices, and any other devices that may be involved in the exchange of telephone numbers, business card information, or related activities, and in other contexts as well.

Abstract: A command is received at an operating system of a first mobile phone for displaying contact information of a remote user having a mobile phone number of a second mobile phone. In response to the command, a request is transmitted to a remote server from the first mobile phone over a cellular network requesting an operating status of the second mobile phone. The operating status of the second mobile phone is received from the remote server over the cellular network. The operating status of the second mobile phone is displayed on a display of the first mobile phone as a part of contact information of the remote user associated with the second mobile phone, where the operating status includes current locality of the second mobile phone.