Wireless Roaming Charges

I recently traveled to Canada and had to use use my iphone maps to get driving directions. I received an AT&T bill for 26,765 kb of usage  for $401.50 (Roaming $0.015 per kb). I really don't understand how using your phone for a few minutes would cost so much and how the carrier can get away with it. Be forewarned about this and you might want to tell your carrier to block all international usage just so that this won't happen to you. I've been searching the web and came up with other horror stories.

$62,000 in Wireless Roaming Charges for WALL-E Download

AT&T charges Mythbuster star $11k for hours of data 

Watch Out for Excessive AT&T/iPhone Roaming Charges

Man gets $27,000 phone bill after watching Bears game on web

Ben Lagua