I don’t know if it’s really an expectation, but if another job candidate returns an e-mail message eight hours later, and you get back immediately with a message that says ‘Sent from my iPhone,’ I think it has to be a check box in your favor.

The Smartphone’s Rapid Rise From Gadget to Tool to Necessity - NYTimes.com

guess what? you can put that tagline in your email without buying an iPhone.