By Rick Steves
I take my smartphone to Europe, using it to make phone calls (sparingly) and send texts, but also to check email, listen to audiotours, and browse the Internet. If you're clever, you can do all this without incurring huge data-roaming fees. Here's how.
Many smartphones, such as the iPhone, Android, and BlackBerry, work in Europe (though some older Verizon iPhones don't). For voice calls and text messaging, smartphones work like any mobile phone (see our tips for using one in Europe) — unless you're connected to free Wi-Fi, in which case you can use Skype, Google Talk, or FaceTime to call for free (or at least very cheaply).
The (potentially) really expensive aspect of using smartphones in Europe is not voice calls or text messages, but sky-high rates for using data: checking email, browsing the Internet, streaming videos, using certain apps, and so on. If you don't proactively adjust your settings, these charges can mount up even if you're not actually using your phone — because the phone is constantly "roaming" to update your email and such. (One tip is to switch your email settings from "push" to "fetch," so you can choose when to download your emails rather than having them automatically "pushed" over the Internet to your device.)
The best solution: Disable data roaming entirely, and use your device to access the Internet only when you find free Wi-Fi (at your hotel, for example). Then you can surf the net to your heart's content, or make free (or extremely cheap) phone calls via Skype. You can manually turn off data roaming on your phone's menu (check under the "Network" or "Roaming" settings). For added security, you can call and ask your service provider to temporarily suspend your data account entirely for the length of your trip.
Some travelers enjoy the flexibility of getting online even when they're not on free Wi-Fi. But be careful. If you simply switch on data roaming, you'll pay exorbitant rates of about $20 per megabyte (figure around 40 cents per email downloaded, or about $3 to view a typical web page) — much more expensive than it is back home. If you know you'll be doing some data roaming, it's far more affordable to sign up for a limited international data-roaming plan through your carrier (but be very clear on your megabyte limit to avoid inflated overage charges). In general, ask your provider in advance how to avoid unwittingly roaming your way to a huge bill.