Picture this: You’re finally on that dream European vacation, strolling through the cobbled streets of Rome, gelato in hand. You snap a gorgeous photo of the Colosseum and instinctively text it to your best friend back home, “Wish you were here!” Throughout your trip, you exchange a few more quick texts with family, confirming flight details or just sharing a laugh. You’re careful about data, sticking to Wi-Fi whenever possible for social media. Fast forward a month, and that first phone bill after your return lands in your inbox. Your heart sinks. There, nestled amongst your usual charges, is a line item for “International Roaming – SMS/MMS” that’s unexpectedly high, perhaps even hundreds of dollars. What happened?
Do I get charged for SMS overseas? Yes, almost certainly, unless you’ve taken specific precautions or your mobile plan explicitly includes international roaming benefits. For most standard U.S. cellular plans, sending a text message (SMS) or a picture/video message (MMS) while you’re outside the United States will incur charges, often on a per-message basis, that can quickly add up. Receiving texts can sometimes be free, but this isn’t a universal rule, and receiving picture messages almost always consumes data, leading to potential charges. The key is understanding your specific carrier’s policies and making informed choices before and during your trip.
The Basics: Why Your Texts Don’t Travel Free
When you’re using your phone in your home country, your cellular provider has a direct connection to its network infrastructure – its towers, switches, and data centers. This is a seamless, controlled environment. However, when you step off the plane in a foreign land, your phone can no longer connect directly to your home carrier’s network. Instead, it “roams” onto a local cellular network in that country. This is made possible through agreements, often complex and intricate, between your home carrier (like Verizon, AT&T, or T-Mobile) and various foreign carriers.
Think of it like this: your home carrier is essentially “renting” a piece of the foreign carrier’s network for you to use. And just like any rental, there’s a cost involved. These costs are then passed on to you, the customer, usually with a markup. Every text message you send, every minute you talk, and every byte of data you consume has to traverse this rented network, incurring charges along the way. While technology has advanced dramatically, the underlying financial model for traditional SMS and cellular data roaming still largely relies on these inter-carrier agreements. It’s a system that, for many years, generated significant revenue for carriers, leading to those infamous “bill shock” stories.
It’s important to differentiate between sending and receiving. Sending an SMS initiates an action on the foreign network, which then transmits it back to your home network, and finally to its destination. This typically always incurs a charge. Receiving an SMS, while also using the foreign network, is often treated differently by carriers, sometimes included in international roaming packages as “free incoming texts,” but it’s crucial not to assume this without confirmation.
Unpacking the Price Tag: What Drives Overseas SMS Costs
The exact amount you might be charged for texting overseas isn’t a one-size-fits-all answer. Several key factors play a significant role in determining the dent in your wallet:
- Your Specific Carrier and Plan: This is arguably the biggest factor. Each major U.S. carrier – AT&T, Verizon, T-Mobile, and even smaller MVNOs (Mobile Virtual Network Operators) – has different international roaming policies, plans, and pay-per-use rates. A basic plan might have exorbitant per-text charges, while a premium plan or an international add-on could include unlimited texting.
- The Destination Country: Roaming rates aren’t uniform across the globe. Texting from Canada or Mexico, for example, is often significantly cheaper, or even included, due to specific agreements (like AT&T and Verizon’s plans often encompassing these neighbors). Texting from a remote island nation or a country with less developed telecom infrastructure might be considerably more expensive than from Western Europe or a major Asian hub.
- Your Roaming Package or Add-on: Many carriers offer specific international roaming packages designed to reduce costs. These might be daily passes (e.g., $10/day for unlimited talk, text, and some data), monthly add-ons (e.g., $50 for a set amount of data and unlimited texts for a month), or even included benefits in certain premium plans. If you don’t opt into one of these, you’ll likely be on the much more expensive “pay-as-you-go” or “standard international roaming” rates.
- SMS vs. MMS: A standard text message (SMS) is typically just text – short and sweet, usually under 160 characters. A multimedia message (MMS) includes pictures, videos, audio clips, or longer text messages that convert to MMS. MMS messages are almost universally more expensive than SMS. Critically, MMS messages rely on cellular data to transmit the media, even if it’s just a small photo. This means if you don’t have a data roaming plan, sending or receiving an MMS can trigger data roaming charges on top of the MMS fee itself, leading to a double whammy of expense.
- Sending vs. Receiving: As mentioned, sending a text virtually always incurs a charge on a pay-per-use basis. Receiving an SMS, however, might be free with some international roaming plans or even standard pay-per-use rates from certain carriers. But again, this is not guaranteed, and receiving an MMS will almost certainly trigger data usage charges.
The bottom line is that navigating these charges requires a bit of homework. Assuming your domestic plan magically extends its benefits overseas is a surefire way to invite sticker shock.
Decoding Your Carrier’s International Offerings
U.S. mobile carriers have evolved their international roaming strategies significantly over the years, largely in response to consumer demand and the widespread use of data-driven messaging apps. Here’s a general overview of how the major players typically approach overseas SMS, but always, and I mean *always*, verify with your specific plan and carrier before you travel:
AT&T
AT&T often provides options like the International Day Pass. This popular option charges a daily fee (e.g., $10-$12) only on days you use your phone overseas, and it allows you to use your existing domestic plan’s talk, text, and data allowances in over 200 countries. If you have this pass, unlimited SMS is typically included. Without such a pass, you’d be on standard pay-per-use rates, which can be quite steep for both sending and receiving texts, in addition to expensive data and call rates.
Verizon
Verizon’s similar offering is often called TravelPass, functioning very much like AT&T’s Day Pass. For a daily fee (e.g., $10-$12), you can use your domestic plan’s talk, text, and data in over 210 countries. Unlimited texting is generally part of the TravelPass benefit. If you don’t activate TravelPass, Verizon’s standard international roaming rates for SMS can be high, often charging per text message sent and potentially for received messages as well, depending on the country. They also offer monthly international plans for longer trips or heavier usage.
T-Mobile
T-Mobile has generally been ahead of the curve when it comes to international roaming, often including it as a built-in feature in many of its postpaid plans (e.g., Magenta, Go5G). For many plans, customers get unlimited texting and basic data (at 2G speeds, which is very slow) in over 215 countries and destinations at no extra cost. This is a significant advantage for casual texters. For faster data speeds or more extensive usage, T-Mobile also offers optional high-speed data passes. The beauty of T-Mobile for texting is that if you have one of these plans, your SMS messages are usually covered, removing a lot of the stress.
Smaller Carriers and MVNOs
If you’re with a smaller carrier like Visible, Mint Mobile, Boost Mobile, or an MVNO, their international roaming capabilities vary wildly. Some may offer very limited or no international roaming at all, requiring you to rely entirely on Wi-Fi or a local SIM. Others might have specific add-ons or partners for international travel. It’s especially critical for customers of these providers to check their international policies well in advance.
My own experience with a family member who used a smaller carrier for a trip to Japan perfectly illustrates this. They assumed “unlimited talk and text” meant globally, only to find out their carrier had no roaming agreements in Japan whatsoever. They were completely disconnected until they bought a local eSIM. Lesson learned: never assume; always verify.
The takeaway here is that you absolutely need to understand *your* carrier’s specific offerings. A quick call to customer service or a visit to their international roaming page on their website before your trip can save you a world of hurt.
SMS vs. MMS vs. Data-Driven Messaging: The Crucial Distinctions
This is where many travelers get tripped up. The world of “texting” isn’t as simple as it used to be. Understanding the differences is paramount for managing costs overseas.
Standard SMS (Short Message Service)
- What it is: Text-only messages, usually limited to 160 characters per segment. They are transmitted over the cellular voice network (the “signaling” channel) rather than the data network.
- How it’s billed overseas: Typically charged on a per-message basis for sending, unless included in a roaming package. Receiving SMS might be free or charged, depending on your plan and carrier.
- Key characteristic: Reliable even with weak data signals, as it uses the older, more robust signaling channels.
MMS (Multimedia Messaging Service)
- What it is: Messages that include pictures, videos, audio, or group texts. Long text messages that exceed SMS character limits can also be converted to MMS by your phone.
- How it’s billed overseas: MMS messages require cellular data to be sent and received. If you send or receive an MMS overseas without an international data plan or a roaming package that covers data, you will incur data roaming charges in addition to any potential per-MMS fee. This is a notorious source of bill shock because a single picture can consume enough data to trigger significant charges. Even if your phone is set to “low data mode” or you’re trying to conserve, an MMS can slip through and cause issues.
- Key characteristic: Data-dependent, therefore much riskier for unexpected charges if not covered by a data roaming plan.
Data-Driven Messaging Apps (iMessage, WhatsApp, Telegram, Signal, etc.)
- What they are: These are applications that send messages over the internet (IP-based messaging). They can handle text, photos, videos, audio, and group chats, effectively replacing both SMS and MMS for many users.
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How they’re billed overseas:
- Over Wi-Fi: When connected to Wi-Fi (e.g., in a hotel, café, airport), these apps use the Wi-Fi network to send and receive messages. This is generally free, as you’re not using your carrier’s cellular network at all. This is the golden rule for international communication: use Wi-Fi for these apps.
- Over Cellular Data: If you use these apps when connected to a foreign cellular network (i.e., using data roaming), they will consume your cellular data allowance. If you have an international data roaming package, this data usage will count against that allowance. If you don’t, you’ll be charged at expensive pay-per-use data roaming rates, which are often the biggest culprits of massive phone bills.
- Key characteristic: Highly efficient and feature-rich, but entirely dependent on an internet connection (Wi-Fi or cellular data). This is the preferred method for most travelers who want to communicate without incurring traditional SMS/MMS roaming charges.
I cannot stress this enough: The distinction between traditional SMS/MMS and data-driven apps like WhatsApp is absolutely critical. For an iPhone user, the blue bubble (iMessage) vs. green bubble (SMS) distinction is a visual reminder. If you’re sending a blue-bubble iMessage, it’s using data. If you’re sending a green-bubble SMS, it’s using the carrier’s text service. While overseas, prioritize blue bubbles over Wi-Fi, and avoid green bubbles unless explicitly covered by your roaming plan.
Your Proactive Playbook: A Checklist to Sidestep Surprises
Avoiding unexpected overseas SMS charges doesn’t have to be complicated, but it does require a bit of foresight and preparation. Here’s a comprehensive checklist to ensure you’re squared away before you even board that plane:
Before You Go: Preparation is Key
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Contact Your Carrier, Seriously: This is step one. Call their international roaming department or use their online chat service. Explain where and when you’re traveling. Ask specific questions:
- What are the pay-per-use rates for sending and receiving SMS/MMS in [country/countries]?
- What international roaming packages are available for my plan and destination?
- Do these packages include unlimited SMS? What about MMS?
- What are the data roaming rates if I *don’t* have a data plan?
- Are incoming texts truly free, or do some incur a charge?
Make sure you understand the answers clearly. Get it in writing if possible (e.g., an email summary of the conversation).
- Research Roaming Plans/Add-ons: Based on your carrier’s offerings, decide if a daily pass (like TravelPass or International Day Pass) or a monthly add-on makes sense for your travel style and duration. For shorter trips with light usage, a daily pass might be ideal. For longer trips or heavy usage, a monthly package could be more economical. T-Mobile users, check if your plan already includes international texting and basic data.
- Consider a Local SIM Card or eSIM: For extended stays or if your carrier’s plans are too expensive, buying a local SIM card upon arrival or purchasing an eSIM before you leave can be a game-changer. These offer local rates for calls, texts, and data, which are almost always significantly cheaper than roaming. Ensure your phone is unlocked before considering a physical local SIM. eSIMs are a digital alternative that allows you to easily switch carriers without changing a physical card, and many international eSIM providers offer excellent data and messaging packages.
- Unlock Your Phone (If Using a Physical Local SIM): If your phone is still locked to your U.S. carrier, you won’t be able to use a foreign physical SIM card. Contact your carrier to ensure your phone is unlocked before traveling.
- Inform Family & Friends: Let people know your international communication strategy. Tell them you’ll be relying on Wi-Fi for messaging apps like WhatsApp or iMessage and to avoid sending you MMS if you don’t have a data plan. This manages expectations and prevents them from inadvertently causing you charges.
- Download Offline Maps and Essential Apps: Prepare by downloading offline maps (Google Maps, Maps.me), translation apps, and any other essential travel apps. This reduces your reliance on cellular data while abroad.
While Abroad: Smart Usage to Keep Costs Down
- Turn Off Cellular Data (Unless Covered by a Plan): If you do not have an international data roaming package, keep cellular data turned OFF in your phone settings. This is crucial to prevent background app refreshes, email syncs, and especially MMS messages from racking up huge data roaming charges. Even with data off, you can usually still send and receive standard SMS.
- Prioritize Wi-Fi for Messaging Apps: Whenever you have access to free and secure Wi-Fi, use it! Connect to Wi-Fi in your hotel, cafes, or public hotspots, and use apps like WhatsApp, iMessage, Messenger, or Telegram for all your communications, including sending photos and making calls (VoIP).
- Disable MMS (If You Can): Some phones allow you to disable MMS messaging specifically while keeping SMS active. Check your messaging app settings. This can prevent accidental data usage from sending or receiving multimedia.
- Monitor Your Usage: Many carriers offer apps or online portals where you can track your international usage in near real-time. Check this regularly to avoid surprises.
- Be Mindful of Incoming MMS: Even if you turn off *outgoing* MMS, incoming MMS messages (like a picture from a friend) will still try to download via cellular data if your cellular data is on and you don’t have a data plan. If you suspect an MMS is coming, try to connect to Wi-Fi before it fully downloads.
- Use Wi-Fi Calling: If your carrier supports Wi-Fi Calling, enable it. When connected to Wi-Fi, calls and texts made via Wi-Fi Calling typically count towards your domestic plan, meaning they’re essentially free or billed at domestic rates, even if you’re overseas. This is a fantastic way to call and text home without roaming charges.
- Consider an “International Mode” on Your Phone: Some newer smartphones offer smart travel settings that can help manage data and roaming automatically. Familiarize yourself with these.
The Receiving End: Are Incoming Texts Always Free?
This is a common question, and the answer, unfortunately, is “it depends.” Historically, many carriers would charge for both sending and receiving SMS while roaming. With the advent of more competitive international roaming packages, some carriers now include unlimited *incoming* SMS as part of their daily or monthly passes, or even as a standard feature on pay-per-use roaming. For instance, T-Mobile’s included international roaming typically covers both unlimited incoming and outgoing SMS.
However, you cannot assume incoming texts are always free. If you’re on a very basic pay-per-use roaming plan without any special add-ons, your carrier might still charge you a small fee (e.g., $0.50-$1.00) for each SMS received. This is particularly true in certain less common or more expensive roaming destinations. And as repeatedly emphasized, receiving an MMS message is very different; it uses data and will almost certainly incur data roaming charges if not covered by a data plan.
The safest approach is to explicitly ask your carrier about the cost of *receiving* SMS and MMS in your specific destination country when you call them before your trip. Don’t leave it to chance, because even a few cents per text can quickly become a significant sum if you’re getting bombarded with automated messages or group chats.
Beyond Text: Local SIMs, eSIMs, and the Future of Connectivity
While discussing SMS charges, it’s worth broadening our view to overall connectivity solutions for international travel, as these often mitigate the need for traditional SMS roaming entirely.
Local Physical SIM Cards
Pros: Usually the cheapest option for data, calls, and texts if you’re staying in one country for an extended period. You get a local phone number, which can be convenient for local services.
Cons: Requires an unlocked phone. Involves finding a local store, dealing with activation (which can sometimes be complex with language barriers), and physically swapping out your primary SIM, meaning you can’t receive calls/texts to your U.S. number unless you have a dual-SIM phone.
eSIMs (Embedded SIMs)
Pros: Incredibly convenient. You can purchase and activate an eSIM plan digitally before you even leave home, or while abroad, without needing a physical card. Many providers offer regional or global plans, simplifying travel across multiple countries. Your primary physical SIM (U.S. number) remains in your phone, allowing you to still receive calls/SMS to it (though potentially at roaming rates if not covered), while your eSIM handles data locally.
Cons: Requires a compatible phone (most newer iPhones, Google Pixels, and some Samsung Galaxy phones support eSIM). Might be slightly more expensive than a local physical SIM for very long stays, but often much cheaper than carrier roaming plans.
Wi-Fi Only
Pros: Completely free for messaging and calls via apps like WhatsApp, FaceTime Audio, Zoom, etc., as long as you’re on a Wi-Fi network. Zero chance of roaming charges.
Cons: Limits your connectivity to Wi-Fi hotspots, meaning you’ll be disconnected when on the go, sightseeing, or in areas without Wi-Fi. Can be inconvenient for navigation or spontaneous communication.
Many travelers, myself included, have found a hybrid approach to be the most effective. I often purchase an eSIM for data while keeping my U.S. physical SIM active primarily for receiving authentication codes or essential calls/texts, knowing that incoming SMS might be free or minimally charged, and outgoing are strictly avoided. This gives the best of both worlds: cheap data and the ability to stay connected to my primary number for critical communications.
When Every Text Counts: Emergency Communications Abroad
While we’re focused on avoiding charges, it’s vital to acknowledge situations where the cost becomes secondary to safety and necessity. In an emergency overseas, being able to send an SMS or make a call might be crucial. If you find yourself in a genuine emergency and need to contact local emergency services or alert family, the cost of a text or call should not deter you.
It’s always a good idea to know the local emergency numbers for your destination (they’re rarely 911). Keep them handy, perhaps written down or stored in your phone’s contacts. Most phones allow emergency calls even without a SIM card or active service, but sending an SMS to a loved one might still depend on having active roaming or a local SIM. In these critical moments, the peace of mind of being able to communicate outweighs any potential charges.
My Two Cents: Personal Reflections on International Messaging
Having navigated the complexities of international phone usage for years, both personally and professionally, I’ve got a pretty clear stance: never travel without a plan. I’ve heard countless stories, and yes, even experienced a minor scare or two myself, where a lack of foresight led to unexpected expenses. The biggest trap, in my opinion, is the assumption that because “everyone texts,” it must be cheap or free everywhere. That’s just not the case with traditional cellular roaming.
My top piece of advice is to embrace data-driven messaging. WhatsApp, iMessage, and similar apps have truly revolutionized international communication, making it practically free when connected to Wi-Fi. If you’re on a budget or simply want to avoid the headache, train yourself and your frequent contacts to rely on these apps. For anyone with a T-Mobile plan that includes international texting, you’re already ahead of the game, but even then, I’d still lean on Wi-Fi for heavy photo sharing to conserve data.
The rise of eSIMs has been a game-changer. It means you no longer have to hunt for a SIM card vending machine at an airport or grapple with foreign language instructions to get connected. A few taps on your phone, and you can have affordable data for navigation and messaging. This technology has, in my view, made dedicated international roaming plans from major U.S. carriers less essential for data, though their unlimited texting features can still be a draw for convenience.
Ultimately, the power is in your hands. A little research and planning beforehand can save you significant money and stress, allowing you to focus on enjoying your trip rather than fretting about your phone bill.
Frequently Asked Questions About Overseas SMS Charges
What’s the difference between SMS and iMessage when traveling?
This is a critical distinction for iPhone users! SMS (Short Message Service) is your carrier’s traditional text messaging service. When you send an SMS, it’s typically shown as a green bubble on your iPhone, and it uses your cellular network’s signaling channel. Overseas, sending these can incur per-message roaming charges unless your plan specifically covers them.
iMessage, on the other hand, is Apple’s internet-based messaging service, appearing as a blue bubble. It sends messages over data, not the traditional cellular text network. When traveling, if you’re connected to Wi-Fi, iMessages are essentially free as they use the Wi-Fi network. If you’re using cellular data (and have an international data plan or add-on), iMessages will consume your data allowance. If you don’t have a data plan, sending iMessages via cellular data will lead to expensive data roaming charges. The key takeaway: prioritize blue bubble iMessages over Wi-Fi when abroad to avoid charges.
Will I be charged for receiving a text while overseas?
It depends entirely on your specific mobile carrier and the international roaming plan you have (or don’t have). With many modern international roaming packages (like Verizon TravelPass or AT&T International Day Pass), incoming standard SMS messages are often included as “unlimited texts.” T-Mobile’s standard international roaming also typically includes unlimited incoming and outgoing texts.
However, if you’re on a basic pay-per-use roaming rate without any special add-ons, some carriers may still charge you a small fee per incoming SMS message, particularly in certain countries. Critically, receiving an MMS message (which includes pictures, videos, or group chats) almost always consumes cellular data, and if you don’t have an international data plan, this will lead to expensive data roaming charges. Always check with your carrier directly to confirm their policy on incoming SMS and MMS for your specific destination before you travel.
How can I check my carrier’s international SMS rates?
The most accurate way to check your carrier’s international SMS rates is to visit their official website or contact their customer service directly. Major U.S. carriers like AT&T, Verizon, and T-Mobile have dedicated sections on their websites specifically for international roaming, where you can often enter your destination country and view available plans and pay-per-use rates.
A phone call to their customer service, specifically asking for the international roaming department, is also highly recommended. Be prepared with your exact travel dates and destinations. This direct conversation ensures you get the most up-to-date and personalized information for your specific plan and prevents any misunderstandings from general online information. Don’t rely on third-party websites for this critical information, as rates and plans change frequently.
Are emergency texts (like 911 equivalents) free overseas?
Unlike emergency calls, which are often free to dial even without an active SIM or service in many countries, the status of emergency *texts* overseas is less clear-cut and can vary significantly. In the U.S., initiatives for “Text-to-911” exist, but this isn’t universally adopted or functional in every country, nor is it consistently free while roaming.
If you’re in an emergency situation, the most reliable and universally recognized method is almost always to make a voice call to the local emergency number. While the cost of a text in an emergency should be a secondary concern, it’s not guaranteed to be free or even functional. Familiarize yourself with the local emergency voice numbers for your destination and prioritize voice calls in life-threatening situations. Confirming texting capabilities for emergencies with local authorities or your embassy/consulate before travel is advisable if you anticipate a need for text-based emergency communication.
What if I accidentally send an MMS instead of an SMS?
Accidentally sending an MMS (a picture, video, or long text that converts) instead of a plain SMS while overseas can be a costly mistake, especially if you don’t have an international data roaming plan. MMS messages require cellular data to transmit. If your cellular data is turned on and you send an MMS, it will trigger data roaming charges at potentially very high pay-per-use rates, on top of any per-MMS fee your carrier might impose.
To avoid this, ensure you understand the difference between SMS and MMS (e.g., green vs. blue bubbles on iPhone, or checking message size/content before sending). If you’re without a data plan, it’s best to keep cellular data completely off and rely on Wi-Fi for all multimedia messaging through apps like WhatsApp or iMessage. If you do accidentally send an MMS, immediately turn off cellular data and contact your carrier to check your usage and potential charges. Some carriers offer data usage alerts that can notify you when you hit certain thresholds, which can help mitigate the impact of such an accident.
Should I disable cellular data entirely to avoid SMS charges?
Disabling cellular data entirely is a highly effective strategy to avoid *data roaming charges*, which are often the most expensive aspect of international phone usage. This means no accidental app refreshes, no unexpected email syncs, and no costly MMS downloads. However, simply disabling cellular data does not necessarily prevent standard SMS charges.
Standard SMS (text-only, green bubbles on iPhone) uses a different part of the cellular network than data. So, you can typically still send and receive SMS even with cellular data turned off. Whether you get charged for these SMS messages still depends on your carrier’s specific international SMS rates or if you have an international texting plan. Therefore, while turning off cellular data is excellent for managing data costs, you still need to be aware of your carrier’s SMS roaming policies to completely avoid text message charges.
Can I still receive authentication codes (2FA) via SMS overseas?
Yes, in most cases, you can still receive SMS-based authentication codes (often called Two-Factor Authentication or 2FA) while overseas, provided your phone has a signal and you haven’t explicitly disabled all SMS services. These codes are sent via standard SMS. Whether you are charged for receiving them depends on your carrier’s policy regarding incoming international SMS (as discussed earlier, some plans include free incoming SMS, while others may charge per message).
This is a crucial point for travelers, as many online services (banking, email, social media) rely on 2FA via text messages. If you plan to rely solely on Wi-Fi and an eSIM for data, you’ll want to ensure your primary U.S. SIM remains active in your phone (if you have a dual-SIM device) or at least available to receive these texts. Alternatively, consider switching your 2FA methods to app-based authenticators (like Google Authenticator or Authy) or email verification *before* you travel, as these rely on data/Wi-Fi rather than SMS.
What’s the deal with cruises and SMS charges?
Cruises are a special and often very expensive scenario for SMS and all mobile usage. When your ship is out at sea, it typically relies on a satellite-based cellular network. This “maritime roaming” is distinct from land-based international roaming and usually comes with its own, significantly higher, pay-per-use rates for calls, texts, and data. Your carrier’s standard international roaming packages (like TravelPass or International Day Pass) usually do *not* cover maritime roaming.
This means sending an SMS from the middle of the ocean can be exceptionally expensive, potentially several dollars per text. Receiving texts might also incur charges. It is highly recommended to put your phone into airplane mode once the ship leaves port and rely entirely on the ship’s Wi-Fi (which usually comes with its own separate, often expensive, service packages) or wait until you dock in a port where land-based roaming might apply. Always check with your cruise line and your mobile carrier specifically about “maritime roaming” charges before embarking on a cruise.