Time to upgrade your mobile device? Here, four state-of-the-art models that will keep you connected, wherever you may roam.
Apple iPhone 4S: The iPhone 4S (and the upcoming iPhone 5) is unbeatable when it comes to apps—more than 675,000 at press time—but international perks vary by carrier. AT&T and Verizon Wireless offer roaming plans, and Sprint and Verizon let you use a local SIM card. $199; AT&T, Sprint, Verizon Wireless.
Samsung Galaxy SIII (pictured): This sleek phone operates on networks at home and abroad (though Sprint and Verizon only work in 48 countries). Its technologies are impressive: one tracks your eye so the screen stays on when you look at it; another switches from text message to call mode when you put the phone to your ear. $199; all major carriers.
HTC One S: Slim, light, and with long-lasting battery power (up to a day and a half), this Android avoids roaming charges by automatically switching to an Internet phone setting when you call from a wireless hot spot. Camera functions include a “burst mode” that can take 99 continuous shots. $149; T-Mobile.
Nokia Lumia 800: Travel apps are a breeze on this tiny phone, which uses the new Windows Phone system. The Lumia 800 also lets you use a locally purchased SIM card abroad. When you include data in your prepaid SIM plan, you’ll have access to your apps on the road. $900; amazon.com.