The 3UK sim for Sailors and Seafarers works in 71 Countries. This sim lets you take a UK allowance of Unlimited UK texts and unlimited incoming txts and 12gb data to 71 destinations around the world. Use a data device or your unlocked smartphone, just like you would at home. Just set the APN and "Rock On". Use this sim on land or at sea when you are in range of land based towers.
It is important to note that while you are outside the UK and in the Go Roam around the world destinations, your max data usage per 30 days is 12GB, so get 2 sims if you need more data and are using it outside the UK. Visiting the UK; you can get unlimited data.
Three Sim - UK + 71 Countries. | ![]() |
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Plan | Talk | Text | Data | Intnl | Cost |
30dy | -- | UNL | 12 GB | --- | $29 |
30dy | -- | UNL | 20 GB | $5 | $39 |
30dy | -- | UNL | 50 GB | $5 | $49 |
30dy | -- | UNL | UNL GB | $5 | $69 |
![]() +3in1 Sim $5.99 |
How to place the order
1. Select your plan.
2. Select the travel date.
3. Complete the order
4. We will ship the sim and activate your plan a few days before travel so you can get setup before you depart.
Have a great time in Europe or wherever you Go Roaming.
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Hotspot and tethering is supported.
The Three sim card supports 3G to 5G data connections based on location and device capability.
Works perfectly with apps like WhatsApp, Viber, Skype, Facebook Messenger, Snapchat ..etc.
Three sim is the most reliable product for your communication needs in the UK and 71 "Go Roam" countries. With Go Roam, you'll enjoy unlimited minutes and unlimited texts valid for calls and texts to UK/EU numbers, up to 12 Gig Data and $5 MRSIM WorldTalk for International Calls (5GB & 12GB Plan). Plans run up to 30 days and can be renewed. This sim is a perfect partner for social communication; it rocks WhatsApp, Viber, Skype, Facebook...etc over a solid data connection.
Go Roam Europe Destinations.
Aland Islands, Austria, Azores, Balearic Islands, Belgium, Bulgaria, Canary Islands, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France (inc. Corsica, Mayotte & Reunion), French West Indies - (Including French Guiana, Guadeloupe, Martinique, Saint Martin, Saint Barthelemy, Les Saintes, Marie-Galante and La Desirade.), Germany, Gibraltar, Greece (Including Crete, Corfu and the other Greek Islands), Guadeloupe, Guernsey, Hungary, Iceland, Ireland, Isle of Man, Italy (Including Vatican City, Sardinia and Sicily), Jersey, Latvia, Liechtenstein, Lithuania, Luxembourg, Madeira, Malta, Marie-Galante, Martinique, Mayotte, Netherlands, Norway, Poland, Portugal - (Including Madeira and the Azores), Réunion, Romania, Saint Barthelemy, Saint Martin, San Marino, Slovakia, Slovenia, Spain - (Including the Canary Islands and Balearic Islands), Sweden, Switzerland, The Netherlands, Vatican City.
Go Roam Around the World Destinations.
Australia, Brazil, Chile, Colombia, Costa Rica, El Salvador, Guatemala, Hong Kong, Indonesia - (Including Bali), Israel, Macau, New Zealand, Nicaragua, Panama, Peru, Puerto Rico, Singapore, Sri Lanka, Uruguay, US Virgin Islands, USA, Vietnam.
Three Data is perfect for staying in touch with family while overseas. Your unlocked smartphone is capable of running a variety of video chat applications that are great for sharing such as Skype, Duo, Facetime and Whatsapp. Click here to learn about 6 video chat applications you can use to stay in touch.
iPhone / iPad - Just set the APN to: "three.co.uk"
Android Devices - Create a three data profile with the following settings:
Name: Three
APN: "three.co.uk"
MMSC: http://mms.um.three.uk:10021/mmsc
MMS Proxy: mms.three.co.uk
MMS Port: 8799
MCC: 234
MNC: 20
APN Type: default, supl, mms
Video: How to configure data - (Android)
Alternatively you can 333 from your Three phone or +44778 233 3333. The Three UK customer service team will help you to set up your mobile internet.
Three includes unlimited incoming text messages (SMS) and unlimited sms to EU numbers. SMS messages are green on iPhones. With iMessage you can send texts, photos, videos, locations and contacts to other iPhones, iPods and iPads. iMessages are Blue on iPhone. iMessage works the same way as sending a text. Your iPhone will check to see whether the recipient's using a compatible device. You'll be able to tell whether you're sending an iMessage or a text by the colour of the contacts name and the send button.
Click here to learn more about iMessage on iPhones.
Your phone number is sent to you by email when the order is processed. It used to be printed on the sim beneath the barcode circled above. It is not there anymore.
(44) is the country code, the other eleven digits are the number i.e. - 07463892563.
Calling the number above from the USA, I would dial +44 7463892563 or 011 44 7463892563.
People calling / texting you would save the number in their phone as +44 7463892563.
Dial 333 and press send. Listen to the IVR to hear your balance.
View mobile numberDial *#100# and press send. You Three mobile number displays on the screen.
Three UK InfoThree UK Customer Service is available at +44 778 233 3333 or "333".