14.09.2026
Sometimes finding affordable mobile internet while traveling can be a serious challenge. Individual eSIM plans for the Caribbean, South America, and island territories are often expensive, and traveling across multiple countries usually requires different plans. An alternative to this is using combined packages. With these plans, you get a large data allowance like a UK eSIM, plus additional gigabytes that can be used universally as an international eSIM across 68 destinations. It is a practical way to secure mobile data abroad and simplify your connectivity while traveling.
These are local prepaid plans from the mobile operator Three UK. Their main advantage is that they include international roaming, allowing them to function as a convenient eSIM for 68 destinations.
Key features of these packages include:
a UK phone number starting with +44;
a large or unlimited data allowance in the UK;
additional gigabytes valid in 68 destinations;
a single QR code and one eSIM for the entire trip;
30-day validity after activation;
calls and SMS messages according to the conditions of the selected plan.
|
Plan |
UK Data |
Global Data |
|
UK 40GB + 6GB Worldwide |
40 GB |
6 GB |
|
UK 100GB + 12GB Worldwide |
100 GB |
12 GB |
|
UK 200GB + 18GB Worldwide |
200 GB |
18 GB |
|
UK Unlimited + 30GB Worldwide |
Unlimited |
30 GB |
The global gigabytes are a shared pool that can be used across all covered destinations. They are not allocated separately per country but are drawn from the plan’s total limit.
Using a combined package simplifies logistics when crossing borders. A sample itinerary might look like this:
UK → USA → Puerto Rico → Brazil → Peru.
Instead of having to search for:
an eSIM for the UK;
an eSIM for the USA;
an eSIM for Puerto Rico;
an eSIM for Brazil;
an eSIM for Peru.
The user installs one plan and allocates the available international gigabytes among the visited destinations.
These plans are especially useful when traveling to countries and territories where small, standalone packages are often more expensive. This includes:
Caribbean islands;
South and Central America;
French overseas territories;
Remote islands;
Australia and New Zealand.
The extensive list of supported countries is what makes this plan useful for transcontinental travel. You have coverage in the following locations:
Europe:
Austria, Azores, Balearic Islands, Belgium, Bulgaria, Vatican City, Germany, Greece, Denmark, Estonia, Ireland, Iceland, Spain, Italy, Canary Islands, Cyprus, Latvia, Lithuania, Liechtenstein, Luxembourg, Madeira, Malta, Norway, Isle of Man, Poland, Portugal, Romania, San Marino, Slovakia, Slovenia, Hungary, Finland, France, Netherlands, Croatia, Czech Republic, Switzerland, Sweden.
North and Central America:
USA, Costa Rica, Guatemala, Nicaragua, Panama, El Salvador.
South America:
Brazil, Chile, Colombia, Peru, Uruguay, French Guiana.
The Caribbean:
Puerto Rico, Guadeloupe, Martinique, Saint Martin, Saint Barthélemy, US Virgin Islands.
Asia and Oceania:
Hong Kong, Indonesia, Singapore, Sri Lanka, Vietnam, Macau, Australia, New Zealand.
Middle East and Africa:
Israel, Mayotte, Réunion.
Note: Connection quality and mobile data speeds depend entirely on the infrastructure and coverage of local partner networks in each individual country.
Besides distant destinations, this plan is also an option for those traveling across the continent. Whether you are looking for a Europe eSIM or simply need mobile internet in Europe for a short trip, the package works as a combined UK and Europe eSIM. The same eSIM provides mobile internet in Germany, France, Spain, Portugal, Switzerland, Italy, and the rest of the supported European destinations. This means you have internet in Austria or can use it as a Germany eSIM and a Spain eSIM without changing your settings.
For those traveling to the region's largest country, the international package provides the option to use it as a Brazil eSIM. This gives you access to mobile internet in Brazil, facilitating communication and navigation. Having internet for travel to Brazil saves you the need to search for local prepaid cards upon arrival.
The international package can be used as a Chile eSIM, a Colombia eSIM, a Peru eSIM, or a Uruguay eSIM without needing to install a new profile when moving between countries.
Finding a local SIM card in this part of the world can take time. The Three UK plan also functions as a French Guiana eSIM, giving you basic access to internet in French Guiana. The ability to have mobile internet in French Guiana directly after landing is a major convenience for tourists.
For those crossing multiple borders in the region, the plan provides mobile internet in Central America. It can be used as a Costa Rica eSIM, a Guatemala eSIM, and a Panama eSIM. If your route continues, the coverage includes the ability to use it as a Nicaragua eSIM or an El Salvador eSIM.
Traveling around the Caribbean is often associated with high roaming charges, but with this plan, you can have a universal Caribbean eSIM. It offers internet in Guadeloupe and works as a Martinique eSIM. It also covers a Puerto Rico eSIM, internet in Saint Martin, a Saint Barthélemy eSIM, and internet in the US Virgin Islands. The same eSIM can continue to work when traveling between supported islands, with network access depending on the local coverage of each individual island.
The combined package also covers a number of popular destinations in the East. It can serve as a Hong Kong eSIM or an Indonesia eSIM. The plan provides mobile internet in Asia, covering internet in Singapore, a Sri Lanka eSIM, and internet in Vietnam.
The plan can be used for mobile internet in Hong Kong, Indonesia, Singapore, Sri Lanka, and Vietnam, as well as for travel to Australia and New Zealand.
This makes it a convenient solution for mobile internet in Asia and Oceania, as it includes options like an Australia eSIM and a New Zealand eSIM within the same profile.
Suitable for:
short international trips;
navigation, chatting, and browsing social media;
basic usage outside the UK.
Suitable for:
vacations in one or two international destinations;
more frequent use of video content;
combined travel between the UK and Europe.
Suitable for:
travel across several different countries;
intensive use of mobile data within the UK;
a larger international backup pool.
Suitable for:
unlimited internet with no daily FUP in the UK;
extended travel;
visiting several expensive or remote destinations;
users who want the maximum international package for more flexibility.
Each of the listed plans includes a UK +44 number. This means you get an eSIM with a UK number, as well as unlimited calls and SMS within the UK and the EU. Outside the UK and the EU, calls and SMS messages are only allowed to UK numbers. The number is received automatically via SMS immediately after activating the plan on a supported network.
If you are looking for a UK eSIM with a phone number or an eSIM with calls and SMS, this option covers those needs. The package functions as a standard prepaid UK eSIM, providing a fully-featured UK eSIM card with added international roaming.
Choose the appropriate plan according to your needs.
Receive the QR code online.
Install the eSIM upon arrival in a covered destination.
Connecting to a supported network activates the plan automatically.
Receive an SMS with your UK phone number.
Important terms of use:
The QR code must be scanned and used within 60 days of receiving it.
The eSIM profile can only be installed once on a single device.
The profile must not be deleted from the phone's settings.
Your device must support eSIM technology and must not be locked to a specific mobile operator.
Three UK plans are a practical solution not only for the UK but also for travelers across Europe, North and South America, the Caribbean, Asia, and Oceania. Using a single shared international package can be significantly more convenient and cost-effective than buying a separate eSIM for every destination.
These plans are local to the UK but include an international roaming package valid in 68 other destinations worldwide. You can use the included international gigabytes for high-speed mobile data in Europe, South America, the Caribbean, Asia, and Oceania. The connection is made automatically to the operator's local partner networks without the need for manual configuration.
The data allowance depends on the chosen plan, with options of 40GB, 100GB, 200GB, or fully unlimited data. This primary package is used exclusively while you are within the United Kingdom. Even if you completely exhaust your international roaming allowance while traveling, your UK data remains available.
The international gigabytes act as a shared pool across all supported destinations outside the UK. They are not allocated as separate quotas per country but are drawn from a single limit. This means you can use the entire allowance in one specific country or flexibly distribute it while crossing multiple borders.
Yes, you can travel freely between all 68 supported countries with just one installed profile. There is no need to buy, scan, or activate a new card every time you cross a border. Your mobile device will automatically connect to the relevant local network as soon as you arrive at a new destination.
The coverage includes the UK, the entire European Union, and popular destinations like the USA, Australia, and New Zealand. The plan also covers many regions where roaming is typically expensive, including the Caribbean islands, Central and South America, and parts of Asia. It's recommended to check the full list of supported destinations on the product page before your trip.
Yes, every plan automatically provides a real UK phone number starting with the +44 area code. It activates as soon as you install the profile and your phone successfully connects to a supported mobile network. The number itself will be sent to you via an SMS message shortly after the initial network registration.
The plan offers unlimited calls and SMS messages within the UK and across the European Union. When you are outside the UK and the EU, you can only call and text standard UK numbers. Outbound calls to local numbers in third countries (such as a restaurant in the USA or Brazil) are not included.
The 30-day validity starts the moment the profile successfully connects to a mobile network in any of the covered destinations. It does not start on the date of purchase or when the QR code is generated. Please note that after these 30 days expire, the plan will automatically stop working.
It is best to install the QR code shortly before your departure or immediately upon arrival when you have a stable Wi-Fi connection. Keep in mind that the QR code must be scanned within 60 days of receiving it. If you install it while in an unsupported country, the plan will simply wait until you arrive in a covered network to activate.
Your choice depends entirely on the length of your trip and your personal data usage habits. For short trips and basic communication, the package with 40GB in the UK and 6GB abroad is perfectly sufficient. If you are planning a long trip or visiting several remote countries, the unlimited plan with 30GB of international roaming will give you maximum peace of mind.
