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Cheapest SIM Only Deals – 100GB Data SIM Card Best Offers




SIM Only Best Deals


SIM Only 100GB Data Deals


Enjoy a whopping 100GB of data every month for just £12 with this limited time SIM card deal.

You’ll also get unlimited calls and text as well as 5G speeds if you have a 5G phone.

Pop this online exclusive SIM card deal into your phone and start saving!



Best SIM Only Deals with 100GB Monthly Data





Find the Cheapest SIM Only Deals








Can I use this SIM card plan in my existing phone?

Yes, so long as your phone is unlocked to all networks (or on Three) you can benefit from this unlimited data SIM only deal.


Is this 100GB SIM only deal 5G enabled?

Yes, so long as you have a 5G enabled phone and 5G coverage on Three in your area then you can enjoy superfast 5G speeds with this SIM only offer.


What if my phone is only 4G?

No problem, your phone will connect using 4G using this SIM card plan and you’ll still benefit from 100GB of monthly data.


Can I keep my number?

Yes, simply text the word PAC to 65075 and your network will send back your PAC code within 60 seconds, call 333 from your new phone and give Three your PAC, they’ll transfer your number across for you the next working day.


What if I’m already on Three?

This special offer unlimited data SIM only deal is supplied with a new number, however you can easily keep your existing Three number by ‘Double Porting’…

Simply switch your Three number to a Pay As You Go SIM card on another network using the instructions above and then repeat the process switching back to your new Three unlimited data plan the next working day.

You can find full details and a step by step guide to ‘Double Porting’, here.










This heavily discounted 100GB data SIM only plan is being offered by Three as an online exclusive via the Three Partner Channel.

This means that to find and order this deal on Three’s website, you’ll need to use the link on

This Three 100GB data SIM only special offer is not available on Three’s customer facing website, however using the link on directs you to your basket to checkout securely with Three on their website.

SIM cards for this 100GB data deal are dispatched by Three via Royal Mail.

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