Sometimes a website (e.g. Amazon) will ask for a mobile phone number so they can send you a text message (e.g. to track a shipment), but they also ask you which carrier you use (e.g. AT&T, Verizon,...
I live in Germany now. I got an invitation for Google Voice, but was unable to make use of it since my location was outside the U.S. Any idea when Google Voice will start to become available in ...