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Best international SIM only deals

By Mof Gimmers | Friday, June 18th 2021

Do you regularly call a number of people in different countries outside of the UK? Maybe you’re in a business that requires you to call overseas clients or maybe you have family who live abroad.

Making a lot of international calls on a standard rate can get expensive, so you might be thinking of getting an international SIM card. Whatever your reason for making frequent calls abroad, an international SIM or an international calls bolt-on to your existing mobile plan will save you a lot of money. We've laid out all the options right here.

International SIMs from EE

EE Mobile

There are two options for calling abroad with EE. The first is a pay-as-you-go international SIM that runs for 30 days and automatically rolls over each month. To sign up, simply order a free PAYG EE SIM and text CALL ABROAD to 150. This will then enable you to make cheaper calls to over 70 countries, including Australia and the USA, India, China and much of the EU. Data allowances range from 8GB for £10 per month to 50GB for £20 per month.

The second option is an international add-on for existing EE customers. Choose from the International pack for £10 per month (this covers 50 countries) with calls costing as little as 1p per minute, or the International Extra pack for £20 per month (which covers 100 countries). To buy, simply call 150 from your EE handset. Just make sure you check which countries are covered in each add-on before you buy.

If you're thinking about getting a new mobile deal and you like the sound of EE, visit our EE mobile review to help you decide.

See EE International SIM deals

International SIMs from Vodafone

Vodafone Mobile

If you are an existing Vodafone customer and want to call friends and family who are overseas, you can pay for one of the Vodafone International add-on packages. These last for 30 days. For £3 per month you get 100 minutes to 100 destinations including landlines (text ADDINTL100 to 40506), for £7.50 per month you get 500 minutes to 100 destinations including landlines (text ADDINTL500 to 40506), or you can pay £10 per month to get 75 minutes to 212 countries or pay £20 to get 200 minutes to 212 countries. Check which country (or countries) you need to call and select the pack that includes those countries.

If you just want to send texts abroad, you can pay £5 per month to get 100 texts to international mobile numbers. Text INTTEXT to 40506 to sign up.

For Vodafone PAYG customers, you can pay £5 per month and get 50 minutes to make calls to any of the 200 countries included.

If you're not already with Vodafone and are thinking of joining, then read our Vodafone mobile review for further information.

See Vodafone SIM deals

International SIMs from O2

O2 Mobile

You can order an International Big Bundle SIM from O2, and top it up with £10 or £20 credit. Prices vary per country, but start from 1p per minute. For the £10 option, on top of your 500 international minutes to 29 destinations (that can also be used in the UK), you get 5,000 texts and 5GB data. For the £20 option – the Premium International Big Bundle – you get 15GB, 5,000 texts and 1,000 minutes to the UK and 48 international destinations. You also get 250 additional minutes to Nigeria, Pakistan and South Africa. Simply order your SIM online and choose your bundle.

Alternatively if you have an O2 mobile plan already and just want to save money on international calls, you can buy the International bolt-on for £3 per month which will give you discounted calls and texts from the UK, from just 1p per minute. Check which countries are covered before you sign up and then text INT to 2020 to sign up.

If you are thinking about signing up to O2, check out our review of O2 to get more information.

International SIMs from Three

Three Mobile

If you’re a Three pay monthly customer, you can buy a Call Abroad Add-on package. Choose from the Call Abroad 100 Add-on, which gives you 100 minutes to call landline and mobile numbers for £5 per month, or the Call Abroad Unlimited Add-on, which costs £10 per month and gives you unlimited minutes to international landlines and mobiles. Both add-ons last for a month and roll on automatically unless you cancel.

For PAYG customers, Three offers rates from as low as 1p per minute to 28 international destinations. Some destinations require a shortcode to get the discounted price; a full list of the destinations included and the shortcodes can be found on Three’s website.

If you are looking for a new mobile provider and considering moving to Three, then take a look at our review of Three mobile to get the lowdown.

International SIMs from Sky Mobile

Sky Mobile

If you are already a Sky Mobile customer, you can add Sky’s ‘International Saver’ to your existing monthly plan for £3 per month if you visit your account at ‘My Sky’. Sky Mobile offers discounted rates on calls and texts to 60 countries. You can look at Sky’s mobile tariff guide to see how much your international calls will cost.

If you are not already a Sky Mobile customer and are thinking of signing up, Sky offers six SIM-only data deals with free unlimited calls and texts. Read our review of Sky Mobile to find out more.


We’ve only looked at the major UK providers in this list – there are of course, other companies that offer international SIMs and services, such as OneSim, KeepGo, Lycamobile, and more. If you have a stable wi-fi connection at home, and so do the people you’re calling, you could avoid an international SIM card altogether, and opt for one of the host of alternatives online, such as free calls through WhatsApp, Viber, Zoom or FaceTime.

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