Here's your backup phone
. . .
via FastCoDesign:
$50 does seem a teensy bit pricey for the cell-phone equivalent of an MRE, but just like those indestructible emergency rations, the SpareOne can sit in a box for 15 years and still be ready to go when you need it. (Since it runs on an AA, the phone will hold a “charge” as long as the disposable battery itself will.) That works out to a little more than three bucks a year, which makes SpareOne seem like a smart buy after all.
And, for obvious reasons, the glass back raises concerns about the iPhone 4’s droppability. With previous iPhones, it was liking dropping a piece of buttered toast — there was a lucky and unlucky side on which it could land. With the iPhone 4, it’s like dropping a piece of toast that’s been buttered on both sides.

