Mars 2022 —

Three replacement sim: how does it work?

Hey there! Do you have any trouble with your sim card or just need to change it? You are at the right place! Find out everything you need to know about Three replacement sim, and how Monisnap can make your life easier!

Discover Three replacement sim and top up in a minute!


Three replacement sim: top up
Three replacement sim

Three UK (legally Hutchison 3G UK Limited) is a British telecommunications and internet service provider currently based in Reading, England. It is a subsidiary of CK Hutchison Holdings, operating under the global Three brand. Three is the fourth-largest mobile network operator in the United Kingdom, with 13.3 million subscribers as of July 2020.

The company launched on 3 March 2003 as the United Kingdom's first commercial 100% 3G network. It provides 3G, 4G and 5G (in certain areas) services through its own network infrastructure.

Three began a limited rollout of 4G LTE services in December 2013 in London, Birmingham, Manchester, and Reading expanding to over a further 450 locations by the end of 2014. In August 2012 Three was given permission to use part of the 1,800 MHz spectrum used by EE's 4G network.

On 20 February 2013 Ofcom announced that Three had been awarded 2 x 5 MHz (10 MHz) of 800 MHz to use for 4G. Three planned to launch 4G in the second quarter of 2013, however it delayed the rollout until Q4, saying that it wanted to analyse the performance of other networks' 4G coverage first. The network provides LTE and DC-HSDPA service as a standard feature to all its subscribers using "Ultrafast" to describe both technologies, making it the cheapest price for 4G and the only unlimited 4G in the UK.

On 23 April 2015, Three mobile announced that VoLTE would be rolled out along with 800 MHz spectrum from September.

Three sim deals: the best offers

Three sim deals are many and contain different elements in greater or lesser quantities such as data, sms and local or international credit. Depending on the offers contained in the Three top up plan, the price will be higher or lower.

You will find the right Three top up plan according to your needs. Let us help you!

Here are the main and best Three only sim deals:

List of the main Three only sim deals

Complete table: price, data, minutes and texts

Price£10.00 (6 months half price - £20 from month 7)£16.00 (100GB data for only £16 a month)£12.00£10.00£7.00£6.00
MinutesUnlimitedUnlimitedUnlimitedUnlimited200 minutesUnlimited

How to get a Three replacement sim?

Whether you are an only sim or pay as you go customer if you need to replace your sim, don’t worry! One of Three service is the Tree replacement sim which allows you to receive your new sim to your home!

To get your new sim, go on the “support” section of Three website and select replacement sim card in the sim support sub-section.

Your SIM will arrive in 1-2 working days.

How to activate or reactivate my Three sim?

To activate or reactivate your sim (if you’ve ordered a Three replacement sim), go in “support” and select “sim activation” on Three website.

Then, just enter your Three number your new 19-digit SIM number (ICCID). Your sim will be activated within two hours.

Three replacement sim: top up online
Three replacement sim

Top up a Three sim online

In UK, you can top up Three mobile with My3 top up account, which allows you to register a credit/debit card for quick future top-ups.:

  • To register a credit/debit card and top-up, select Top-up your account from the My3 homepage, then select the Credit/debit card tab and register this card for future use on the payment screen. You can also register a card by going to the Manage cards section of My3 and selecting Add card.
  • To make a one-off card payment, simply fill in your payment details or select the One-off payment option.
  • To top-up by voucher, select Top-up your account from the My3 homepage, then select the Voucher tab and follow the instructions to top-up.

You can also top up via Web top up of Tree mobile, without having to register and just entering your phone number and a credit or debit card.

In any case, you can subscribe to any Three top up plan on

You just proceed to a Three replacement sim or get your first Three sim? Top up easily and quickly with Monisnap (ex Allo)! With Monisnap, top up Three credit and data in 1 minute!

Need to top up your phone?

Monisnap, top up quickly and easily

Top up in 1 minute!

Top up your Three sim card in 1 minute with Monisnap (ex Allo)

Want to buy a phone top-up now? Monisnap is the easiest and cheapest way to top up your credit in a minute!

With Monisnap, you can buy credit top up from many operators including Three top up, with the most competitive rates on the market! Monisnap is here to make your work easier and to allow you to benefit as simply as possible from credit or internet top-ups.

It is quite simple. Either on the website of Monisnap or on the mobile application:

  • Enter the country and phone number you want to top up
  • Choose the Three mobile credit or data top-up you want
  • Pay on our secure website

You are all set! The beneficiary's mobile will then be credited in one of the following ways depending on the top-up purchased:

  • If it is an "Instant top-up", it will be automatically credited to the recipient's mobile, who will receive a confirmation SMS
  • If it is a "PIN top-up", you will receive a PIN code by email and on your customer area with the instructions to follow to top up the mobile

The type of recharge (instant or PIN) is indicated in the description of each recharge.

Get your top up right now!

🧐 What is Three replacement sim?

Three replacement sim is an option provided by Three mobile! It allows you to order a new sim to your home.

👀 What are the tariffs for a Three UK sim?

Two Three UK sim plans are available regarding your expected consumption and your payment preferences. 

🙌 How can I activate my Three sim?

Find in the article below how to contact the Three Customer Service. 

👌 How to top up my Three UK sim?

With Monisnap (ex Allo), you can top up in 1mn a SIM and for free!

Yannis Rahal

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