Generally, hotel surcharges on long-distance and local calls are astronomical, so you're better off using your cellphone or a public pay telephone. Many convenience stores, groceries, and packaging services sell prepaid calling cards in denominations up to $50; for international visitors these can be the least expensive way to call home. Many public pay phones at airports now accept American Express, MasterCard, and Visa credit cards. Local calls made from pay phones in most locales cost either 35¢ or 50¢.

Most long-distance and international calls can be dialed directly from any phone. For calls within the United States and to Canada, dial 1 followed by the area code and the seven-digit number. For other international calls, dial 011 followed by the country code, city code, and the number you are calling.

Calls to area codes 800, 888, 877, and 866 are toll-free. However, calls to area codes 700 and 900 (chat lines, bulletin boards, "dating" services, and so on) can be very expensive -- usually a charge of 95¢ to $3 or more per minute, and they sometimes have minimum charges that can run as high as $15 or more.

For reversed-charge or collect calls, and for person-to-person calls, dial the number 0, then the area code and number; an operator will come on the line, and you should specify whether you are calling collect, person-to-person, or both. If your operator-assisted call is international, ask for the overseas operator.

For local directory assistance ("information"), dial 411; for long-distance information, dial 1, then the appropriate area code and 555-1212.

Cellphones

Just because your cellphone works at home doesn't mean it will work everywhere in the U.S. (thanks to our nation's fragmented cellphone system). It's a good bet that your phone will work in major cities, but take a look at your wireless company's coverage map on its website before heading out; T-Mobile, Sprint, and Nextel are particularly weak in rural areas. If you need to stay in touch at a destination where you know your phone won't work, rent a phone that does from InTouch USA (tel. 800/872-7626; www.intouchglobal.com) or a rental-car location, but be aware that you'll pay $1 a minute or more for airtime.

If you're not from the U.S., you'll be appalled at the poor reach of our GSM (Global System for Mobile Communications) wireless network, which is used by much of the rest of the world. Your phone will probably work in most major U.S. cities; it definitely won't work in many rural areas. To see where GSM phones work in the U.S., check out www.t-mobile.com/coverage/national_popup.asp. And you may or may not be able to send SMS (text messaging) home.

In New York City, you can rent cellphones at Roberts Rent-a-Phone, 226 E. 54th St., New York, NY 10022 (tel. 800/964-2468 or 212/832-7143; www.roberts-rent-a-phone.com) or Cellhire USA, 45 Broadway, 20th Floor, New York, NY 10006 (tel. 866/235-5447; www.cellhire.com).

Internet & E-Mail

To find cybercafes in your destination check www.cybercaptive.com and www.cybercafe.com.

Most major airports have Internet kiosks that provide basic Web access for a per-minute fee that's usually higher than cybercafe prices. Check out copy shops like Kinko's (FedEx Office), which offers computer stations with fully loaded software (as well as Wi-Fi).

More and more hotels, resorts, airports, cafes, and retailers are going Wi-Fi (wireless fidelity), becoming "hotspots" that offer free high-speed Wi-Fi access or charge a small fee for usage. Wi-Fi is often found in campgrounds, RV parks, and even entire towns. Most laptops sold today have built-in wireless capability. To find public Wi-Fi hotspots at your destination, go to www.jiwire.com; its Hotspot Finder holds the world's largest directory of public wireless hotspots.

For dial-up access, most business-class hotels in the U.S. offer dataports for laptop modems, and a few thousand hotels in the U.S. and Europe now offer free high-speed Internet access.

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.

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.