According to Erica Sadun at TUAW, the iPhone can be used with an old SIM card. She activated her phone, then popped out the SIM card and put in an old one. The iPhone continued to function as an iPod, plus web and email via Wi-Fi.
However, I’m pretty sure this won’t work with an unactivated iPhone — and in the comments someone noted that it’ll likely get disabled when iTunes checks for a software update.
Leander Kahney is the editor and publisher of Cult of Mac. Leander is a longtime technology reporter and the author of six acclaimed books about Apple, including two New York Times bestsellers: Jony Ive: The Genius Behind Apple’s Greatest Products and Inside Steve’s Brain, a biography of Steve Jobs.
Leander has written for Wired magazine, Scientific American, The Guardian, The Observer, The San Francisco Chronicle, MacWeek and many other publications.
