Indispensable: Phone or IPod?

Guardian writer Dave Birch asks which gadget he'd miss most if he accidentally left it at home: his cell phone or his iPod.

"As far as I know... mobile phones are indeed indispensable... Yet twice in the past month, I have found myself on a train to London without my mobile phone but with my iPod. I am starting to wonder if it means something more than age-related forgetfulness.

Perhaps it is psychological. When I was coming home on the train without my iPod, I was sitting next to man who spent the entire journey loudly eating a large bag of crisps and sitting opposite a young couple discussing whether it was Prince Philip or Prince Edward who really pulled the strings in The Firm. Who wouldn't long for their iPod in such circumstances, and imprint a mental note to never forget it again."