37Signals mentions a neat iPhone feature that displays the location based on the area code. Now I agree that it's a nice feature but the little application I am using on my phone is so much better. With the use of 3G and an application from Opplysningen 1881 the caller's name and address is displayed when I receive a call. The application does a request to Opplysningen 1881 to look up the number in the white and yellow pages and within a couple of seconds the name and address is displayed on my phone. So I can let it ring for two seconds and then decide whether to take the call or not.