Mars 2022 —

Three co UK sim activation: how does it work?

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

Discover Three co UK sim activation and how does it work in a minute!


Three co uk simactivation: top up
Three co uk simactivation

Three UK (legally Hutchison 3G UK Limited) is a British telecommunications and internet service provider currently based in Reading, England. Three is the fourth-largest mobile network operator in the United Kingdom, with 13.3 million subscribers as of July 2020 and its network today covers 99% of the UK population.

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 launched 5G in August 2019 and also has the UK’s leading 5G spectrum holdings with more than the rest of the industry combined. Three is the only operator able to meet the International Telecoms Union (ITU) 2020 standard for full 5G services.

Three was voted the Best Network for Data at the Mobile Choice Consumer Awards, as well as Best Network for Roaming by uSwitch, and the Best High Street Retailer at the Mobile Industry Awards.

Three UK is part of the CK Hutchison Holdings Ltd group of companies which has mobile operations in 11 countries. Three employs more than 4,800 people across their offices in Reading, Glasgow and their 311 retail stores.

Three top up: the best offers

With Three top up, no contract, no credit checks, no problems. Just use your mobile phone and pay. If you need more credit or data, top up at any moment.

Three top up deals depend on the top up you choose. Depending on the offers contained in the Three top up, the price will be higher or lower.

Three offers top ups so you can top up your phone to the amount you need at the time. For example, Three top up in UK allows you to top up your phone from £10 to £50.

Three packages are usually complete and include call time, SMS, and data. Here are some of the most famous of them:

List of most popular Three packages

Complete table: price, data, minutes and texts

Price per month£10.00 during 6 months ; then £20.00 per month£16.00£5.00 during 6 months ; then £10.00 per month£6.00£14.00
MinutesUnlimitedUnlimitedUnlimited200 minutesUnlimited

How to get a Three sim?

Whether you are an only sim or pay as you go customer if you need to get a Three sim, don’t worry! You can get a Three SIM from any Three store (make sure you take valid photo ID with you), or you can order one free on

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. Then, go to the next step : Three co UK sim activation!

Three co uk simactivation: Three best offers
Three co uk simactivation

Three sim activation: how to do it?

Recently joined Three, or received a replacement SIM? There’s no need to activate your new SIM. You can follow these steps to install it in your phone and it’ll connect to the Three network automatically:

  • If you're using a non-Three phone, make sure that it's unlocked.
  • Check that you've fully charged your phone’s battery.
  • Insert your SIM into your phone and switch it on.
  • You’ll receive a first text to let you know your sim activation started. Make sure you keep your phone switched on while you’re connected to the Three network. This should only take about 2 hours but during busy periods it may take longer.
  • When it’s nearly finished, you’ll receive another text asking you to turn your phone off and on again.

Your Three sim will now be activated!

How to top up my Three sim online?

The easiest way to top-up is using the Three app. Just make sure you’ve got a card registered. The easiest way for quick future top-ups!

  • Open the Three app and go to Allowance.
  • Tap top-up, or you can choose an Add-on instead.
  • Choose your top-up amount or an Add-on, then follow the instructions to pay.

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

Three: top up in 1mn 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 UK?

Three UK is a British mobile and Internet operator, based in England.

👀 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 activate your three sim. 

👌 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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