In the west, I hear that Bluetooth-based telephone number and email address exchange is the standard way. However, this recent survey conducted by goo Research and reported on by japan.internet.com into mobile phone address books showed very different habits in Japan.
Between the 30th of July and the 3rd of August 2008 1,001 members of the goo Research monitor panel completed a private internet-based questionnaire. 53.0% of the sample were male, 11.3% in their teens, 23.5% in their twenties, 21.4% in their thirties, 16.2% in their forties, and 27.7% aged fifty or older.
The main reason for Bluetooth not being used is that it is far from standard on mobile phones. I’ve looked before at Bluetooth in Japan, but why it has never taken off is a mystery to me, although the fact that infrared was already established as a standard on Japanese phones might have something to do with it.
I rarely exchange telephone numbers with people, but when I have it is always one person calls the other that we do, mainly as people can’t remember where to find the infrared menu options! For Q1, my mobile phone number is 090-xxxx-8128, but I haven’t a clue what the four digits in the middle are.