Three splits roaming into three bands, Go Roam in Europe, Around the World and Around the World Extra, so your destination sets what a trip costs. Our Global eSIM is one flat price by trip length, from USD 9.99 for 3 days, across 165+ countries.
Land in the wrong band and the daily charge changes with you.
Three splits roaming into three bands, so your destination sets the bill
Three sorts its Go Roam service into Europe, Around the World and Around the World Extra, and each band covers a different list of destinations. Europe covers 49 European destinations, Around the World covers 22 global spots, and Around the World Extra covers 92 additional international locations.
Then the daily charge kicks in. Three’s Go Roam page puts the Around the World charge at £7 a day for some customers: “If you joined or upgraded between 1 October 2021 and 17 December 2025, the daily roaming charge will be £7” (Go Roam | Roaming in over 160 destinations, Three Support, 2026).
You pay by the day, and the band you land in sets the rate.
Which countries sit in each of Three’s roaming bands?
Go Roam in Europe covers European destinations like France, Spain and Germany. Go Roam Around the World covers destinations like the USA, Australia and Hong Kong.
Go Roam Around the World Extra takes in further locations such as Turkey, the United Arab Emirates, South Africa, Thailand and Egypt. Those are examples. Three’s own band lists hold the full set of destinations.
Pack for one country and you’ve picked a band without noticing.
How to price a week abroad on Three roaming against a flat eSIM
On Three, a week is seven daily charges, and the rate depends on the band and your contract.
For Around the World Extra destinations, Three’s page states: “If you joined or upgraded on or after 18 December 2025, the daily roaming charge will £8. This will start from 1 April 2026 and will be subject to annual price increases.” (Go Roam | Roaming in over 160 destinations | Support | Three, 2026).
That £8 is a daily rate that rises each year. The flat plan is the same price on day one and day seven.
How does your contract start date change Three roaming charges?
Yes. The date you joined or upgraded sets your daily rate, and Three’s page names more than one date.
Three’s page gives one example for a particular plan: “If you joined or upgraded from 1 June 2025 with a SIM Only 24-month Lite plan with 25GB or 120GB data, the daily roaming charge will be £2” (Go Roam | Roaming in over 160 destinations | Support | Three, 2026). The £7 and £8 rates earlier follow their own start dates too.
Europe adds a second limit. Go Roam in Europe lets you use your UK allowances in 49 European countries and territories, subject to a 12GB monthly data fair use limit.
Check your join date before you fly. Then pick a plan and get on with the trip.
How do you add a travel eSIM next to your Three SIM?
Install the eSIM once on an eSIM-compatible phone, keep your Three SIM in the tray, and choose the eSIM as the line that carries your data. The eSIM stays on the phone, so the next trip needs only a new plan.
On an iPhone, Apple’s published procedure runs like this:
- Open the Settings app.
- Tap either Cellular or Mobile Data.
- Tap Cellular Data.
- Tap the number you want to use cellular data.
If you turn on Allow Cellular Data Switching, while you’re on a voice call on your voice-only number, that number automatically switches to use voice and data. This lets you use both voice and data during the call. If you turn it off and you’re active on a voice number that isn’t your designated cellular-data number, cellular data won’t work while you’re on the call (Apple Support, Using Dual SIM with an eSIM).
On a Google Pixel, the published procedure is:
- Open your Settings app.
- Tap Network & internet SIMs.
- To access data with your mobile network, turn on Mobile data.
- Under “Your primary SIMs,” choose which SIM you want to use for: Data: Tap Mobile data.
Only one SIM can be the default for data. If you already have one set up, you’ll get a notification (Google Pixel Phone Help, Change dual SIM preferences on your Google Pixel phone).
Done. Your data goes through the eSIM and your calls stay on your own number.
What happens on Three in a country outside its roaming bands?
Three sets a worldwide data roaming limit of £45 plus VAT, and you can ask Three to change or remove it. Three’s published words on it are short.
Three’s support page says: “We’ve also set a worldwide data roaming limit of £45 plus VAT to stop you accidentally overspending. If you’d prefer, you can have this limit removed or changed by contacting us.” (Data charges, Three support page).
Which travel eSIM is worth buying instead of paying Three to roam?
Buyers at rival travel eSIM companies report failed installs, dropped connections and slow speeds in their one- and two-star reviews. Those are the tests to run before you pay anyone.
A 2-star Trustpilot review of Saily from September 23, 2025, by Michael F., describes landing in Lisbon with barely any signal and a setup that took well over 2 hours. A 1-star Trustpilot review of aloSIM from August 13, 2026, by Osman D., reads: “No Russian manuals available. I purchased aloSIM for my family while they were traveling, but none of them could set up the eSIM. As an experienced Windows and Android user, I could have probably figured it out by trial and error, but my family couldn’t. It’s way too complicated with English-only instructions. Plus, after my payment successfully processed, the app still asked me to buy the plan again. # update since you are planning to add Russian instructions, I’ll give aloSIM another try. My family is heading to Turkey at the end of August, and if everything goes well, I’ll update my review to 5 stars.”
Atlas, 4.5 billion years old, has watched continents drift. A family stuck at an install screen still earns a wince.
Maya, Airalo, Holafly, Saily or Nomad: which travel eSIM fits your trip?
Three prices roaming by band and by the day. Travel eSIMs sell in different ways, and the table sets out how each one is sold, what its unlimited plan allows and what it says about calls and numbers.
| Travel eSIM | How plans are sold | Unlimited plan allowance, as published | Calls, texts and phone number, as published |
|---|---|---|---|
| Maya Mobile | One Global eSIM for 165+ countries, unlimited data at a flat price by trip length: USD 9.99 for 3 days, USD 19.99 for 7 days, USD 27.99 for 14 days, USD 49.99 for 30 days | A daily high-speed data allowance (the Daily Quota) at up to 4G LTE or 5G where local networks offer it, reset every 24 hours; unlimited data at standard speed once the Daily Quota is used | Data only, with no local number; your own SIM stays in the phone for your calls and texts |
| Airalo | Per country, per region, or one global plan; priced in USD | Our unlimited data packages don’t have a fixed total data cap. However, to keep the network running fairly for everyone, when you use more than 3GB in a day, we’ll slow down (or “throttle”) your internet speed to 1 Mbps for the rest of that day. Your full high-speed connection will automatically be restored when your daily allowance next resets. Your daily allowance resets every 24 hours, counted from the time you activated your eSIM. | We offer flexible data packages — some have calls and texts. |
| Holafly | Per country, per region (Europe, Latin America, Cruise plans), and monthly global plans: Light, 25GB of data, $ 49.90USD/month; Unlimited, $ 64.90USD/month; Ultra, $ 90.95USD/month | Unlimited data plans are subject to a fair use policy, which may temporarily reduce speed in cases of unusually high usage to maintain network quality for all users. | Unlimited Plans purchased on November 4, 2025, or later include a phone number for US, UK, or Canada. Please note that this service supports inbound SMS only and VOIP-based calling (traditional incoming cellular calls are not supported) |
| Saily | Per country and per region, plus one global plan; by the gigabyte, unlimited, or both | The Unlimited plan gives you 5 GB per day at full 4G/5G speed, then keeps you online at 1 Mbps for the rest of the day — fast enough for navigation, messaging, and standard browsing. | Yes, you can keep your own number while using a Saily eSIM plan. If you want to make calls and send SMS messages abroad without worrying about extra carrier fees, you can add a US phone number to your Saily eSIM plan. |
| Nomad | Per country, per region and global plans; by the gigabyte and unlimited | Once the daily allowance of 2 GB is used, data speeds are reduced (throttled) for the rest of the day. Depending on the specific plan, this reduced speed is approximately 1 Mbps or 2 Mbps. | Some of Nomad’s eSIMs include a local phone number. Check the plan details for more information of what your plan includes. |
The rival rows quote each company’s own wording or briefly summarise it, while the Maya Mobile row is taken from maya.net.
How Maya replaces band-by-band roaming charges with one flat price
One Global eSIM is installed on your phone and stays there permanently. You pick a trip length, and the price is the same in every country, one flat rate across 165+ countries.
You can choose a 3-day, 7-day, 14-day or 30-day plan, and each one gives unlimited data across 165+ countries. All plans include a daily high-speed data allowance, the Daily Quota, at up to 4G LTE or 5G where available on local networks.
Here are the prices. The 3-day plan costs USD 9.99 (USD 3.33 a day) and suits weekend trips. The 14-day plan costs USD 27.99 (USD 2.00 a day) and is marked Most Popular.
Need more days? Buy another plan from the Maya app. For each trip you only buy a new plan, with no reinstalling.
Andreas K. gave Maya Mobile five stars on Trustpilot in August 2026: “Have been using Maya mobile for all my recent trips to the US – never had any problems. Setting up the eSIM was easy and Internet access was working instantly when I left the plane.”
No band lists. No join dates. Pick your days and go.
FAQ
What happens to the eSIM when your plan’s days run out?
Every plan is a one-time purchase, so it ends when its days end. The exception is Auto Top-Up, which is optional, off by default and can be turned off any time from My eSIM. The eSIM stays installed on the phone, ready for the next trip. To add days, extend your plan from the app or buy another plan there.
How do you install a travel eSIM before you fly?
Do it on Wi-Fi, because installation needs an internet connection. You can install in three ways on iPhone and Android: automatic, QR code or manual entry. On iOS the QR code method is marked Recommended: choose it in the Maya Mobile app, scan the code with the phone you’re installing on, tap Add eSIM or Add Cellular Plan when notified, and follow the prompts. When you land, switch the eSIM on and select it for Cellular Data, and the plan clock starts then.
What does unlimited data mean on a travel eSIM with a daily allowance?
Each plan comes with a Daily Quota, a daily high-speed data allowance that runs at up to 4G LTE or 5G where local networks offer it. Once it is used up, data carries on at standard speed until the day ends. The Daily Quota refreshes on its own every 24 hours, counting from the activation date. No specific speed is guaranteed.
How do refunds work on an unused travel eSIM plan?
You get a full refund, less any applicable payment processing fees, if no data has been used and you ask within 30 days of purchase. The Money Back Guarantee covers a cancelled trip, a phone that isn’t compatible with eSIMs, an extra or unneeded data plan, and an eSIM that is unused or consumed no data. The complete refund terms are in the Terms of Service.
Which cruise lines does the Global + Cruise plan cover?
Yes, the Global + Cruise plan covers 20+ cruise lines, and it’s a separate purchase from the Global plan, priced on its own. That includes Norwegian Cruise Line, Royal Caribbean International and Carnival Cruise Line. It also covers 165+ countries.
How do you stop your main SIM from roaming while the eSIM carries your data?
Use the eSIM plan for data only, with your primary line set as the Default Voice Line. That keeps your data off expensive roaming fees. On an iPhone, open Settings, tap Cellular (Mobile Data in the UK), tap Cellular Data and select the eSIM plan. For Voice/SMS and iMessage, choose Primary.
Which countries does the Global eSIM cover?
One Maya eSIM covers 165+ countries worldwide, including major destinations across all continents. You install it once, and there’s no plan to add per country.
Maya gives you one eSIM, installed once, with unlimited data across 165+ countries at a flat price by trip length, from USD 9.99, so a trip abroad skips the band-by-band roaming bill.
