The Best Prepaid SIM Card for London in 2020

Considered one of the most important cities, London was ranked in 2015 as the most visited city in the world. Over 65 million people visited the city that year! You can find many places to go and have a lifetime experience in London, like the British Museum, the National Gallery and the Tower of London. 

If you are interested in visiting this city and you want to carry your phone with you to use it like at home, you will need a prepaid SIM card.  In this article, we will show you the best prepaid SIM cards for London. Enjoy the reading!


What Are The Best SIM Cards for London?


 About the providerSim Card Features 
Welcome to O2 – one of the biggest operators in Europe. It is your reliable connection to the world and your home. Discover the beauties of London with our Prepaid Card. Browse the internet everywhere in Europe and enjoy free calls to the O2 network.
  • Data: 5GB
  • Calls: 150 CZK
  • SMS: 150 CZK
  • Credit Validity: 30 days
  • Category: SIM Card
  • Only US $24.90
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Orange SA is one of the oldest mobile network providers in France. They commit to the best network and recently were awarded as best operator for the eighth time in a row. With the available Travel Prepaid SIM Cards for Europe, you can enjoy a great internet experience through London and Europe. Make international calls or send international text messages from London to worldwide.
  • Data: 8GB*
  • Calls: 30min
  • SMS: 200
  • Credit validity: 14 days
  • Category: SIM Card
  • Only US $29.90
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Go Roam by Three U.K. lets you use your call, text and data allowance in 71 destinations around the world at no extra cost. Sit back, relax and never worry about roaming charges while traveling in London. Multiple years in a row, Three U.K. has been awarded as the best network for roaming. When are you traveling with Three U.K.?
  • Data: 10GB*
  • Calls: Unlimited
  • SMS: Unlimited
  • Credit validity: 30 days
  • Category: SIM Card
  • Only US $29.90
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As one of the biggest network providers in Europe, Three U.K. provides its services to more than 130 million users worldwide. Stay connected to a fast internet network in London and enjoy voice, text & data.
  • Data: 12GB
  • Calls: Unlimited
  • SMS: Unlimited
  • Credit validity: 30 days
  • Category: SIM Card
  • Only US $39.90
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Going on vacation or business trip to London? With Orange Holiday Europe you do not have worry about roaming charges anymore. Browse the internet in all European countries with the best networks available, make calls and send SMS from Europe to your home around the world at no extra cost – guaranteed! Orange has been awareded as the number 1 mobile network for the 8th consecutive time.
  • Data: 20GB
  • Calls: 120min
  • SMS: 1,000
  • Credit validity: 14 days
  • Category: SIM Card
  • Only US $49.90
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simoptions voucher code

Buy Now - Save Big - Travel Later

Enjoy a 20% discount on all SIM Cards for Europe.
Copy the SIMOFF20 and apply it at the checkout page.

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Buy Now - Save Big - Travel Later

Enjoy a 20% discount on all SIM Cards for Europe.
Copy the SIMOFF20 and apply it at the checkout page.

Copy Code

What is The Best London SIM Card?


SimOptions – The best SIM card provider all around the world


SimOptions offers the best quality in terms of mobile services and network coverage because they work with the best mobile network providers. If you get one of their prepaid SIM cards, you will live the best traveling experience in London from the moment you order it through the website.  

This company also works with the best carriers; this means that you will obtain your SIM card at the exact moment you arrive in the city.  Discover the different prepaid SIM cards available in London: 


Holiday Zen | $29.90 - 8GB*

  • Data: 8GB*
  • Calls: 30min
  • SMS: 200
  • Credit validity: 14 days
  • Category: SIM Card

Smart Silver | $29.90 - 10GB*

  • Data: 10GB*
  • Calls: Unlimited
  • SMS: Unlimited
  • Credit validity: 30 days
  • Category: SIM Card

Smart Gold | $39.90 - 12GB

  • Data: 12GB
  • Calls: Unlimited
  • SMS: Unlimited
  • Credit validity: 30 days
  • Category: SIM Card

Holiday Europe | $49.90 - 20GB

  • Data: 20GB
  • Calls: 120min
  • SMS: 1,000
  • Credit validity: 14 days
  • Category: SIM Card

Smart Platinum | $59.90 - 12GB

  • Data: 12GB
  • Calls: not included
  • SMS: not included
  • Credit validity: 1 Year
  • Category: SIM Card

Smart Platinum X | $79.90 - 24GB

  • Data: 24GB
  • Calls: not included
  • SMS: not included
  • Credit validity: 2 Year
  • Category: SIM Card

Stop depending on a WiFi connection and get one of these prepaid SIM cards! Visit the SimOptions website for more information.

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EE – Everything Everywhere


Since 2010, EE operates as an Internet and mobile network services provider. With 29.6 million customers, it is considered the largest mobile network operator in the United Kingdom. You can get one of their prepaid SIM cards in a SIM card vending machine at the Heathrow Airport or on their website. There you will find two options: a Pay Monthly SIM (packed with unlimited minutes, texts and generous 4G data allowance) and the Pay As You Go SIM that you can get without contracts. Those SIM cards will allow you to use your phone in the U.K. and Europe.

First, let’s see the Pay Monthly SIM cards that have a validity of 12 months:


Essential Plan 20GB | £20 ($24.67) – 20GB

  • Data: 20GB
  • Calls: Unlimited
  • SMS: Unlimited
  • Credit validity: 1 month

Smart SIM | £37 ($45.63) 

  • Data: Unlimited
  • Calls: Unlimited
  • SMS: Unlimited
  • Credit validity: 1 month
  • Gift*: 2 Swappable Benefits included

Essential Plan 1GB | £16 ($19.73) – 1GB

  • Data: 1GB
  • Calls: Unlimited
  • SMS: Unlimited
  • Credit validity: 1 month

Essential Plan 100GB | £27 ($33.30) – 100GB

  • Data: 100GB
  • Calls: Unlimited
  • SMS: Unlimited
  • Credit validity: 1 month

5G Smart SIM | £44 ($54.27) 

  • Data: unlimited
  • Calls: unlimited
  • SMS: unlimited
  • Credit validity: 1 month
  • Gift*: 3 Swappable Benefits included

*BT Sport, Roam Further and Amazon Prime Video.


Now, let’s take a look at the Free Pay As You Go EE SIM Card. 


£10 Data Pack | £10 ($12.33) – 2GB

  • Data: 2GB
  • Calls: 100min
  • SMS: unlimited
  • Credit validity: 30 days

£15 Data Pack | £15 ($18.50) – 5GB

  • Data: 5GB
  • Calls: 500min
  • SMS: Unlimited
  • Credit validity: 30 days

As shown in the information above, with EE you can choose the SIM card that best suits your trip to London, whether you need unlimited data to have internet connection or unlimited calls and texts. To get one visit the EE website. 


O2 – The second most important mobile company


O2 is a mobile network operator in the United Kingdom that is based in Slough. It operates as a brand of Telefónica UK Limited, providing its services to 25.1 million subscribers. This company runs 2G, 3G and 4G services across the U.K. and the prepaid SIM cards they offer can be obtained at any of their stores or on their website.

They have different options according to your needs in case you require your SIM card for 30 days, 12 months or 18 months. O2 also offers alternatives for those who wish to travel to other European countries, so you can travel from London to other countries and take your SIM card with you.

Here we show you more information about this section:


Package 500MB | £ 14 ($17.30) – 500MB

  • Data: 500MB
  • Calls: 500min
  • SMS: 500
  • Credit validity: 30 days

Package 1GB | £ 16 ($19.77) – 1GB

  • Data: 1GB
  • Calls: 1,000min
  • SMS: unlimited
  • Credit validity: 30 days

Go Card | $24.90 - 5GB

  • Data: 5GB
  • Calls: 150 CZK
  • SMS: 150 CZK
  • Credit Validity: 30 days
  • Category: SIM Card

    Package 15GB | £ 25 ($30.90) – 15GB

    • Data: 15GB
    • Calls: unlimited
    • SMS: unlimited
    • Credit validity: 30 days

    Package 40GB | £ 40 ($49.44) – 40GB

    • Data: 40GB
    • Calls: unlimited
    • SMS: unlimited
    • Credit validity: 30 days

    Package 50GB | £ 47 ($58.09) – 50GB

    • Data: 50GB
    • Calls: unlimited
    • SMS: unlimited
    • Credit validity: 30 days

    As you can see, with O2 you can get a U.K. SIM card that includes services for browsing, calling and texting. To get one prepaid SIM card in London with a data plan, visit their website. 

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    Vodafone – One of the world’s leading mobile communications providers


    Located in London, Newbury, and Berkshire, this company offers services in regions of Asia, Africa, Europe, and Oceania. This company has different prepaid SIM cards; with the Pay monthly SIM you can choose the contract length (30 days, 12 months or 18 months), or if you prefer not having a contract you can get a free Pay as you go SIM.

    Thinking about traveling to London? Getting a Vodafone prepaid SIM card could be a good option for you, then you can have a local SIM and use your phone without roaming costs. 

    The Pay monthly SIM with a contract for 30 days are the next ones:


    Unlimited Max | £ 32 ($39.46)

    • Data: unlimited
    • Calls: unlimited
    • SMS: unlimited
    • Credit validity: 30 days
    • Includes: 77 roam-free destinations

    Unlimited Lite | £ 25 ($30.83)

    • Data: unlimited
    • Calls: unlimited
    • SMS: unlimited
    • Credit validity: 30 days
    • Includes: 48 roam-free destinations

    Unlimited | £ 28 ($34.53)

    • Data: unlimited
    • Calls: unlimited
    • SMS: unlimited
    • Credit validity: 30 days
    • Includes: 48 roam-free destinations

    Red 20GB | £ 22 ($27.13) – 20GB

    • Data: 20GB
    • Calls: unlimited
    • SMS: unlimited
    • Credit validity: 30 days
    • Includes: 48 roam-free destinations

    Finally, if you prefer the free Pay as you go Sim card, you will not be charged on the days you do not use your phone, and if you do, the rates are as follows: 20p ($0.25) a minute, 20p ($0.25) a text and 20p ($0.25) for every 5MB of data.


    We know very well that getting to a foreign country can be overwhelming sometimes. However, if you are worried about staying connected, in this article we have shown you many different options when it comes to the acquisition of prepaid SIM cards.  Just choose the one that suits you best and enjoy your stay in London!


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