Satellite Phone
 

For sale my iSatPhone Pro. Barely used and in vgc although there is a hairline crack in the screen, cosmetic only. It still has 103 of the original 110 minutes of calltime valid til Dec 2013. Check out details here:

iSatPhone Pro | eBay

If you did get through the included minutes, the call charges are actually cheaper than most standard cellular roaming charges.

Works anywhere you have a clear view of the sky.