There is a way to avoid this though. If you (1) own a smartphone, and (2) make use of mobile Internet on your handset and (3) store your contacts using a sync with GMail, Yahoo! or Facebook you can easily inform your other friends who are also on smart phones that you changed your contact information. In fact, you don’t even need to inform anyone. Whenever you change the information on your Gmail vCard (or Facebook) the next time your contacts sync (which happens often when they’re doing over-the-air Internet), the update takes place. If you enter a new address book contact or make changes to your address book, the change reflects online as well.
So yeah you could say that owning an iPhone, Android or Windows Phone 7 device helps you really stay in touch with your friends not just with reading status updates, but with their contact information as well. Switch to a smartphone now and grab that data plan!