Mars 2022 —

Three sim activation: how to get and top up your SIM easily?

Hey there! You just received a new sim card and you have problems activating it? You are at the right place! Find out everything you need to know about Three sim activation, and how Monisnap can make your life easier!

Discover Three sim activation and how to top up your SIM easily in a minute!


Three sim activation: top up
Three sim activation

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

Three top up plans 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 and the country you’re in, the price will be higher or lower. If you just need a top up, some recharge modes limit the amount of the top up or define a minimum amount.

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.

Find the right Three top up plan according to your needs:

List of Three top up plan deals

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?

Need a Three sim any time soon? Nothing more easy! You can get a Three SIM from any Three store, or you can order one free on You can also buy a SIM with a top-up at some shops and supermarkets.

To get your new sim online, you just have to 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.

Three sim activation: how to do it?

Just received your new Three SIM and need help to activate it? Follow these easy steps to activate your new Three SIM card:

  • If you bought a Three phone and SIM from Three, it should be ready to use as soon as you turn on your new phone.
  • If you're using a non-Three phone, make sure it is 3G or 4G compatible and that it's unlocked.
  • Your phone’s battery needs to be fully charged.
  • Insert your new Three SIM card 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. It usually takes 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 SIM will now be activated but we'll send you another text just to confirm.

How to top up my Three sim online?

There are lots of easy ways to top-up your Three sim online!

First, you can use the Three app, this is one of the easiest way for quick future top-ups! You just need to register a card.

  • 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 go to My3 to top-up, and if you register a credit or debit card, it makes it super easy to top-up quickly in the future. You might need to register if you don't have an account yet. To register a card, go to Manage cards in the Top-up section and click Add card.

  • Go to Top-up now.
  • To top-up, select Top-up with your card or a voucher.
  • Scroll down to find the top-up amount you want.
  • Confirm your address and enter your payment details – then you're all good to go!

If you just want to top-up without registering a card or logging in, that’s fine too. Go to the Three Top-up page and enter your details, then choose Credit/debit card or Voucher and follow the instructions.

An easiest and fastest way to top up your Three sim is to use Monisnap! 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.

💥 How do I get my Three sim?

Three sim are available in shops and supermarket accross the UK! You don't have the time to look for one of these shops? Order your Three sim online on Three website!

👀 What are the tariffs for a Three sim?

Three sim plans are available regarding your expected consumption and your payment preferences. Find them below!

👌 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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