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Cellphones

The three letters that define much of the world's wireless capabilities are GSM (Global System for Mobiles), a big, seamless network that makes for easy cross-border cellphone use throughout Europe and dozens of other countries worldwide. In the U.S., T-Mobile, and AT&T Wireless use this quasi-universal system; in Canada, Microcell and some Rogers customers are GSM, and all Europeans and most Australians use GSM.

If your cellphone is on a GSM system, and you have a world-capable multiband phone such as many Blackberry, Motorola, Sony Ericsson, or Samsung models, you can make and receive calls across civilized areas around much of the globe. Just call your wireless operator and ask for "international roaming" to be activated on your account. Unfortunately, per-minute charges can be high -- usually $1 to $1.50 in Western Europe and up to $5 in places like Russia and Indonesia. Be sure you bring your AC charger, a converter, and an adaptor plug and check with your provider to be sure your converter is safe for the phone's delicate electrical circuits. A car charger can be useful, too.

It's handy to buy an "unlocked" world phone from the get-go. Many cellphone operators sell "locked" phones that restrict you from using any removable SIM card other than the one they supply. Having an unlocked phone allows you to install a cheap, prepaid SIM card that you can purchase and use in your destination country. (Show your phone to the salesperson; not all phones work on all networks.) You'll get a local phone number and dramatically lower calling rates.

Getting a locked phone unlocked can be a hassle, but it can be done. Call your cellular provider before you leave and say you'll be going abroad for several months and want to use the phone with a local provider.

For many, renting a phone is a good idea. While you can rent a phone from any number of overseas sites, including kiosks at airports and at car-rental agencies, we suggest renting the phone before you leave home. North Americans can rent one before leaving home from InTouch USA (tel. 800/872-7626; www.intouchglobal.com) or RoadPost (tel. 888/290-1606 or 905/272-5665; www.roadpost.com). InTouch will also, for free, advise you on whether your existing phone will work overseas; simply call tel. 703/222-7161 between 9am and 4pm EST, or go to http://intouchglobal.com/travel.htm.

Buying a phone can be economically attractive, as many nations have cheap prepaid phone systems. Once you arrive at your destination, stop by a local cellphone shop and get the cheapest package; you'll probably pay less than $100 for a phone and a starter calling card. Local calls may be as low as 10ยข per minute, and in many countries incoming calls are free.

Internet & E-Mail

With Your Own Computer -- More and more hotels, cafes, and retailers are signing on as Wi-Fi (wireless fidelity) "hotspots." Mac owners have their own networking technology: Apple AirPort. T-Mobile Hotspot (www.t-mobile.com/hotspot) serves up wireless connections at more than 1,000 Starbucks coffee shops nationwide. Boingo (www.boingo.com) and Wayport (www.wayport.com) have set up networks in airports and high-class hotel lobbies. iPass providers also give you access to a few hundred wireless hotel lobby setups. To locate hot spots that provide free wireless networks in cities worldwide, go to www.personaltelco.net/index.cgi/WirelessCommunities.

For dial-up access, most business-class hotels throughout the world offer dataports for laptop modems, and a few thousand hotels in the U.S. and Europe now offer free high-speed Internet access. In addition, major Internet service providers (ISPs) have local access numbers around the world, allowing you to go online by placing a local call. The iPass network also has dial-up numbers around the world. You'll have to sign up with an iPass provider, who will then tell you how to set up your computer for your destination(s). For a list of iPass providers, go to www.ipass.com and click on "Individuals Buy Now." One solid provider is i2roam (tel. 866/811-6209 or 920/235-0475; www.i2roam.com).

Wherever you go, bring a connection kit of the right power and phone adapters, a spare phone cord, and a spare Ethernet network cable -- or find out whether your hotel supplies them to guests.

Like Western Europe, Eastern Europe is on 240V electrical circuits. You'll need at least one two-pronged adaptor plug and a current converter unless your electronic gear operates on dual voltage (120V and 240V).

Tip: To find public Wi-Fi hotspots wherever you are in Eastern Europe, go to www.jiwire.com; its Hotspot Finder holds the world's largest directory of public wireless hotspots.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.