Some of our recent callers have alerted us to cell-phone horror stories when traveling overseas. They've been burned for charges ranging from $5/minute on a cruise to an $8,500 bill for a variety of calls made from abroad. A slightly cheaper option is to enroll in your carrier's own international calling plan. If you choose to go this route, make sure you get an e-mail confirmation of your enrollment before you travel. A better and cheaper option still is to buy a prepaid SIM chip online. You might want to use Telestial.com, which is good for when you're doing a single-country trip. Check out RangeRoamer.com if you're going to be traveling to multiple nations. What if you're taking an action adventure trip in uncharted terrority? Try buying or renting a satellite phone, which will still cost less per minute than the usual charges from your carrier. Another tip for travelers: Get an unlocked world phone. T-Mobile will unlock your existing handset after 90 days, while AT&T requires you to complete your contract before they unlock you. You can also try going on eBay and buying an already unlocked world phone on the cheap.