FREE O2 Big Bundle Pay As You Go Sim Cards with UNLIMITED calls and texts.

O2SKU: 1MS.5005

Choose your tariff (top up not included): £5 Big Bundle


Order your free sim card at

MAXIMUM 1 FREE SIM per person/household within 6 months

O2 BIG BUNDLE Tariff Features

NEW Pay As You Go Tariffs from just £5 a month. Your top up lasts for 30 days and O2 give you a choice of 4 tariffs.

Tariffs now include UNLIMITED calls and texts to other UK phones and more data than ever before


  • Now with 7GB Data 
  • UNLIMITED UK Calls & Texts
  • UNUSED data rollover


  • 15GB Data 
  • UNLIMITED UK Calls & Texts
  • UNUSED data rollover


  • NOW with 100GB Data
  • UNLIMITED UK Calls & Texts
  • UNUSED data rollover

Why not choose your own number? Click the yellow banner below to choose from a range of thousands of numbers

Gold Number Sim Cards at

Also available:


  • UNLIMITED UK Calls & Texts

Perfect for basic phones or for those who don't need mobile data. For £5 a month you'll get UNLIMITED calls and texts, but there is no data allowance.

LAST FEW REMAINING - O2 will no longer issue sims on this £5 tariff from July 2021, so when they're gone they're gone!

Once you have joined this tariff you will be able to remain on it indefinitely if you wish to do so, but no further sims will be available once our current stock has gone.

Minimum top up is £10, which lasts for 60 days. You can access data at the price of £1 per day per 50MB. This will be automatically taken from the available credit on your sim card, so we recommend that you turn off Mobile Data if you're using a smartphone. You will be able to access your own home or work WiFi as well as free O2 WiFi from hotspots around the UK.


  • UNLIMITED calls and texts to any UK network.
  • FREE roaming in the EU - note that this may change after Brexit. Check with O2 if this is important to you. 
  • FREE O2 WiFi hotspots
  • Unused data rollover to the following month (^ £5 Big Bundle sims do not include any data)
  • All sims are supplied in new and sealed official O2 retail packs
  • For the purposes of top up, a "month" means 30 days.

These new tariffs are available now. Packs may show the older tariffs but you will be automatically transferred to the new improved tariff.


O2 are one of the largest and most popular UK networks, and for good reason.

UK based customer service, together with free extras including O2 Rewards, which gives you up to 10% of your top-up back every 3 months.

Example: The £10 Big Bundle 30-day pack offers a generous allowance of 3GB data, with unlimited calls and texts to any UK network for just £10 monthly top up, with other options also available including a £30 package that gives you a massive 100GB of data

Pay As You Go means you're in control. There's no contract to worry about and these 4G sims can be used in any mobile phone - even 2G and 3G.

Your phone needs to be unlocked or on the O2 network, and these sims should work on networks carried by O2 such as GiffGaff, Tesco Mobile and Sky Mobile. 


All sim cards are triple cut to fit ANY mobile phone - sim size Standard (Mini), Micro or Nano

Don't pay up to £4.99 for these sims elsewhere - our sims are now available completely free to UK customers. We even pay the postage!

Do please note that all sim cards are issued strictly for personal use only and are not for resale. Sim cards must be used as the network intended and are subject to the network's terms and conditions (details on pack).

While we take every effort to ensure accuracy please be aware that all networks are constantly striving to keep their tariffs competitive. Therefore tariffs are subject to change without notice.

Also available with £10 top up pre-installed:
O2 Big Bundle sim cards with £10 airtime


We can only supply 1 free sim per person/household in any 6 month period. To get your free sim, enter the discount code FREESIM at checkout.

Up to 5 additional sims can be ordered at 99p each. 

Note that we can not accept repeat sim card orders, or orders for more than one free sim card in any 6 month period.

If you wish to purchase further sim cards you must continue shopping and complete the order in one transaction before checking out, i.e. select the quantity required and "Add to cart". Do not purchase in separate transactions.

Payment & Security

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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information. No payment details are taken if you are ordering a free sim card.

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