Albania
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Aug 27, 2019 Following this video you will be able to use your iphone in Europe, Australia, USA, and really anywhere that iphones are used. These settings will work for verizon, at&t, Sprint, T-mobile and any.
- The iPhone 5s and the 5c use a nano SIM, while older models use the somewhat larger micro SIM. Be sure to buy the right one and try it out in the store before you pay for it.
Jun 16, 2017 How to unlock your cell phone to use it in the UK and Europe If you’re travelling to the UK or Europe, you’ll want to make sure that you can use your cell phone as soon as you land. If you want to use your cell phone with a different network SIM card, you’ll need to get it network unlocked. Aug 16, 2020 An unlocked cell phone will allow you to use a SIM card from any GSM carrier in the phone. Refer to your manual to determine how the SIM card is inserted into the cell phone. In most cell phones, the SIM card slot will be located in the back compartment near the battery.
- FaceTime over cellular1
- Personal Hotspot2
- VoLTE
Andorra
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Austria
- FaceTime over Cellular1-
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
Azerbaijan
- FaceTime over Cellular1
- Personal Hotspot2
Belarus
- FaceTime over Cellular
- FaceTime over Cellular1
- Personal Hotspot2
Belgium
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
- Wi-Fi Calling
Bosnia
Blicnet3
- FaceTime over Cellular1
- Personal Hotspot
- FaceTime over Cellular1
- Personal Hotspot2
Bulgaria
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Croatia
Hrvatski Telekom3
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Cyprus
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Czech Republic
O23
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
T-Mobile3
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
Vodafone3
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- Wi-Fi Calling
Denmark
33
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE
- Wi-Fi Calling
TDC3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Wi-Fi Calling
- VoLTE
Telenor3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- Wi-Fi Calling
Telia3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
- Wi-Fi Calling
Estonia
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Telia Eesti AS3
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot
- Unlocking2
- VoLTE5
Finland
DNA3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Elisa3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Saunalahti3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Telia3
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
France
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
![Europe Europe](/uploads/1/1/8/8/118879531/299564776.jpg)
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
Germany
- FaceTime over Cellular1
- Personal Hotspot2
- LTE
- Visual Voicemail
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- Personal Hotspot2
- LTE
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling8
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot
- Unlocking
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling8
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling8
Gibraltar
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Greece
Cosmote3
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
- Wi-Fi Calling
Vodafone3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Wi-Fi Calling
Wind3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Greenland
Tele Greenland3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Hungary
Magyar Telekom3
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE
- WiFi Calling
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
Vodafone3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE
Iceland
Nova3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE5
Siminn3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Vodafone3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Ireland
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE
- Wi-Fi Calling
Isle of Man
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot
Italy
TIM4
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Jersey
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Kosovo
IPKO Telekom3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
How To Get Iphone 6 Unlocked
Kyrgyzstan
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Latvia
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
LMT3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
How To Use Unlocked Iphone In Europe Free
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Liechtenstein
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
Lithuania
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Omnitel3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Luxembourg
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- Wi-Fi Calling
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
Macedonia
T-Mobile3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
One Telecom3
- FaceTime over Cellular1
- Personal Hotspot2
- Unlocking
- FaceTime over Cellular1
- Personal Hotspot2
Malta
Vodafone3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot
Moldova
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot
Monaco
Monaco Telecom3
- FaceTime over Cellular1
- LTE
- Personal Hotspot
- Visual Voicemail
Montenegro
Crnogorski Telekom3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- FaceTime over Cellular1
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Netherlands
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE5
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
- Wi-Fi Calling
Norway
Telia3
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
Telenor3
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE5
- Visual Voicemail
- Wi-Fi Calling
Poland
Orange3
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE
- Wi-Fi Calling
Play3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
T-Mobile3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE
- Wi-Fi Calling
Portugal
MEO3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
NOS3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
Vodafone3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
Romania
Orange3
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE5
- Wi-Fi Calling
Telekom3,6
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Vodafone3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
Russia
Beeline3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
MegaFon3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking
- Visual Voicemail
- VoLTE5
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Serbia
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Slovakia
O2 Slovakia3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
Orange3
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
Slovak Telekom3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
Slovenia
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
Telekom Slovenia3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
Spain
- eSIM
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE
- Wi-Fi Calling
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE
- Wi-Fi Calling
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE5
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
Sweden
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Visual Voicemail
- VoLTE
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
- Wi-Fi Calling
Switzerland
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- Wi-Fi Calling
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Wi-Fi Calling
Turkey
Turk Telekom3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
Turkcell3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE
- Wi-Fi Calling
Vodafone3
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- Wi-Fi Calling
Ukraine
Kyivstar3
- FaceTime over Cellular1
- FaceTime
- Personal Hotspot
United Kingdom
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE5
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- VoLTE5
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- eSIM
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE5
- Wi-Fi Calling
- Wi-Fi Calling on supported iCloud-connected devices
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- Visual Voicemail
- VoLTE
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime
- LTE
- Personal Hotspot
- Visual Voicemail
- Wi-Fi Calling
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Advanced Mobile Location (AML)7
- FaceTime over Cellular1
- LTE
- Personal Hotspot2
- Unlocking2
- VoLTE5
- Wi-Fi Calling
- You need iOS 6 or later to use FaceTime over Cellular. You might notice decreased performance on some carriers while using FaceTime over Cellular on 2G networks.
- May include an additional fee or requirement. Some iPhone devices are unlocked by default. Contact the carrier for more information.
- The carrier, not Apple, provides technical support for iPhone in this region.
- Includes Vatican City and San Marino.
- VoLTE is available only on iPhone 6 or later.
- Carrier doesn't support MMS.
- In countries and on carriers that support the Advanced Mobile Location (AML) standard, iPhone automatically attempts to send your device location to emergency responders via AML.
- If you have an iPhone 8 (model A1863), an iPhone 8 Plus (model A1864) or an iPhone X (model A1865) on these carriers, the Wi-Fi calling feature requires iOS 12.2. Learn how to find the model number of your iPhone.
FaceTime is not available in all countries or regions.
By Rick Steves
Many travelers enjoy the convenience of bringing their own mobile phone to Europe. Some people also prefer to bring a tablet or laptop for emailing or blogging, uploading or editing photos, reading, and watching videos in their down time. Using your mobile device abroad isn't hard, and with a little preparation, you can text, make calls, and access the Internet without breaking the bank.
How to Set Up (or Disable) International Service on Your Phone
Roaming with your own phone outside the US generally comes with extra charges, whether you are making voice calls, sending texts, or accessing data (going online over a cellular network rather than Wi-Fi, a.k.a., 'data roaming'). If you plan to bring your own phone to Europe, start by assessing how you will to use it — whether you will be making a few or a lot of phone calls, sending and receiving text messages, and how freely and frequently you'll want to get online to check email, look up websites, access maps, get driving directions, or use other mobile apps.
You can pay as you go on your normal plan for all three services. But the costs can add up (on average, about $1.50/ minute for voice calls, 50 cents to send text messages, 5 cents to receive them, and $20 to download one megabyte of data).
Travelers who want to stay connected at a lower cost can sign up for an international service plan through their carrier. Most offer some sort of global calling plan that cuts the per-minute cost of phone calls and a flat-fee data plan that includes a certain amount of megabytes. Your normal plan may already include international coverage, as T-Mobile's does. It's a fairly painless process:
- Confirm that your phone will work in Europe. Nearly all newer phones work fine abroad (as do older phones purchased through AT&T and T-Mobile), but it's smart to check with your carrier if you're unsure.
- Research your provider's international rates. Plan pricing varies wildly by carrier. Call your provider or check their website for the latest pricing.
- Activate international service. A day or two before you leave, log on to your mobile phone account or call your provider to activate international roaming for voice, text, and/or data (whichever features you plan to use), and sign up for any international plans.
- Cancel international service when you get home. When you return from your vacation, cancel any add-on plans that you activated for your trip.
Getting Online in Europe
With any laptop, tablet, or smartphone, you can get online via a Wi-Fi signal, which is usually free. If you have a mobile phone (smartphone or basic) or a cellular-enabled computer, you can get online over a cellular network, but you'll usually have to pay for it.
The most cost-efficient way to get online is to log on to Wi-Fi hotspots during your trip. Even if you have an international data plan, you're better off saving most of your online tasks for Wi-Fi.
If you plan to use any new apps on your device — such as language translators, ebook readers, or transportation or mapping apps — it's smart to download or update them before your trip, when bandwidth isn't an issue.
![How to use unlocked iphone in europe vs How to use unlocked iphone in europe vs](/uploads/1/1/8/8/118879531/221167653.jpg)
Finding Wi-Fi in Europe
Most accommodations in Europe offer free Wi-Fi, but some — especially expensive hotels — charge a fee. In some hotels, Wi-Fi works great; in others, the signal is less reliable or doesn't work well (or at all) beyond the lobby (many European hotels are in old buildings with thick stone walls). Often it's good enough to shoot off an email, but too slow to stream movies or make a video call.
If Wi-Fi is important to you, ask about it when you book — and check that it'll be available in your room. As soon as I arrive at a hotel, I ask at the desk for the password and network name (in case several are in range), so I can log on right away.
When you're out and about, your best bet for finding free Wi-Fi is often at a café. They'll usually tell you their Wi-Fi password if you buy something. As in North America, most McDonald's and Starbucks in Europe offer free Wi-Fi.
You may also find Wi-Fi here and there throughout the day — for example at tourist offices, in city squares (for example, Marienplatz in Munich), within major museums (such as the Tate Modern in London), at public-transit hubs (such as many of London's train stations), and aboard some trains and buses (for instance, Austria's RailJet or on Portugal's long-distance buses). You may need to register or accept terms of service to get online, and some networks limit browsing time.
Tips for Using Data Roaming Smartly
Using data roaming on your cellular network is handy for times when you can't find Wi-Fi. But while convenient, data roaming is also potentially expensive, depending on your international plan rates. You'll want to be conscious of how much data you're using, since you're probably paying for a limited amount of bandwidth. Still, data roaming can be worth it when you're out and about, need to get online, and don't want to waste your valuable vacation time hunting for a Wi-Fi hotspot.
Budgeting your data is easy if you follow these tips:
Avoid using your cellular network for bandwidth-gobbling tasks. Skyping, downloading apps, and watching YouTube all eat up megabytes and can wait until you're on Wi-Fi. (You're on a Wi-Fi network when you see the symbol for Wi-Fi in the corner of your screen — it looks like a half-rainbow.) If you use a navigation app like Google Maps, there are ways to do so without using any cellular data. If you're lost and need to access a map and turn-by-turn directions, do so sparingly.
Keep track of data usage. Upon arrival in Europe, it's smart to start tracking how much data you're using. On your device's menu, look for an item like 'cellular data usage' or 'mobile data' and reset the counter at the start of your trip so you can see how many megabytes you've consumed. Some carriers automatically send a text message warning if you approach or exceed your limit and will let you upgrade your package without penalty.
Limit automatic updates in your email and other apps. By default, many mobile apps are set to constantly check for a data connection and update information. You can cut your data use by switching off this feature in your various apps. Start with your email: Go to your device's email settings and change them from 'auto-retrieve' to 'manual,' or from 'push' to 'fetch.' This means that you will have to manually download (or 'fetch') your messages when you're on Wi-Fi rather than having them automatically downloaded (or 'pushed') to your device. If you receive an email with a large photo, video, or other file, wait until you're on Wi-Fi to view it.
Other apps — such as news, weather, social media, and sports tickers — also automatically update. On some devices, you can select which apps are allowed to update via the cellular network. It's smart to disable these features in most of your apps so that they'll only update when you're on Wi-Fi.
Disconnect from your cellular network altogether. Because there are still ways that you can accidentally burn through data, I like the additional safeguard of manually turning off data roaming or cellular data (either works) whenever I'm not using it — check under 'cellular' or 'network,' or ask your service provider how to do it. Then, when you need to get online but can't find Wi-Fi, simply turn it on long enough for the task at hand, then turn it off again. Another way to ensure you're not accidentally using data roaming is to put your device in 'airplane' or 'flight' mode, and then turn your Wi-Fi back on when needed (this disables phone calls and texts, as well as data).
If you're traveling with an unlocked smartphone, you can buy a SIM card that also includes data; this can be cheaper than data roaming through your home provider.