Unlimited Data Only SIM Card Deals
Buy today and get 50% off for up to 3 months
Enjoy unlimited data, calls & texts on your terms. No long contracts, just total freedom for your mobile life. Plus, enjoy the absence of EU roaming fees until 2026, making it easier to stay connected while travelling.
Why Our SIM Only Plans Stand Out
Unlimited Data, Calls & Texts
Never stress over usage limits again. Stream, browse, work, and stay in touch—with our SIM-only contracts, it’s all truly unlimited.
Ultimate Flexibility
Flexible contracts means you don't have to be locked in. You can join different plans with options for 1-, 12-, or 24-month commitments, making it easy to choose a plan that fits your needs.
Choose Your Network
With a choice of O2 or Vodafone SIM cards you will be on one of the UK's largest mobile network operator without the worry of long contracts
Keep Your Number or Start Fresh
Transfer your existing number in minutes or get a brand-new number from us. Switching networks is easy with the Text to Switch service, allowing you to seamlessly transfer your phone number without any hassle. Simply text PAC to 65075 and start the process of transferring your number today.
Get Rewarded for Spreading the Word
Refer a friend and get £10 credit when they pay their first bill. Enjoy even more value from your deal.
5G & 4G Speeds, All SIM Types Supported
Get blazing-fast internet on your device, wherever you are. We support SIM, Micro-SIM, Nano-SIM & eSIM across phones, tablets, and even mobile broadband devices.
How It Works
Choose your SIM-only plan
Select your preferred network: O2 or Vodafone. Pick the contract length and features that fit your needs.
Order online with a few taps. Your SIM, Micro-SIM, Nano-SIM or eSIM will arrive within 7 working days.
Activate & Get Connected. Follow the activation link that was sent to you by email. Pop your SIM into your device and start enjoying unlimited data, calls, and texts.
Switch or Transfer with Ease. Keep your existing number with a simple PAC code transfer or get a new one instantly.
Enjoy Unlimited Freedom. Flexible contracts, no hassle - just connectivity on your terms.
Why Choose The SIM Warehouse
30 Day Rolling Contracts
No lengthy contracts with our monthly rolling plans. Change your plan or cancel anytime.
Unlimited Calls & Texts
All of our plans include unlimited UK calls and texts.
Choose Your Network
Choose your favourite network with O2 and Vodafone SIM Cards available.
Get Rewarded
Get £10 credit for every friend you refer when they pay their first bill.
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How do monthly rolling contracts work?With a monthly rolling SIM-only contract, you’re free to change plans, switch networks, or cancel at any time. No restrictive 12- or 24-month commitments.
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How do I activate my SIM Card?When you have received your SIM card, simply click the activate button on your email to activate your SIM card.
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What is a data-only SIM card deal?A data-only SIM deal gives you access to unlimited data, with the option to include calls and texts. Unlimited data SIMs are available in various contract lengths such as 30-day, 12-month, and 24-month options. Perfect for smartphones, tablets, laptops, or as a home broadband alternative.
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Can I use the SIM for my business?Absolutely. Our unlimited data SIM deals are ideal for business users who need reliable, high-speed connections on the go.
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Who would my plan be with?Your plan will be with The SIM Warehouse directly. Choose your network and let us do the rest.
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Can I keep my mobile number?Yes! You’ll just need to request your PAC code from your old network. Simply text the word PAC to 605075. We will then transfer you number over seamlessly to your new plan.
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Do you supply handsets?No. The SIM Warehouse does not supply handsets. We are here for all your SIM only needs.
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Do you support 5G and 4G speeds?Yes, all plans come with full 5G and 4G coverage where available, so you’re always connected at top speed.
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Who do I contact?For any queries contact The SIM Warehouse. You can contact us using our Contact Us Form on our website.
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Am I tied in by fees or restrictions?No. Our SIM plans are contract clear. You pay monthly for what you use, with the freedom to change, pause, or cancel at any time.
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How long does delivery and activation take?SIM cards are delivered within 7 working days. Activation is just a click away, so you’ll be online in no time.
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Is there a difference between SIM, Micro-SIM, Nano-SIM and eSIM?Yes, these refer to different SIM sizes and formats. We offer all types, including digital eSIM, to suit any phone, tablet, or compatible device.
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How do I pay my bill?The SIM Warehouse will take an automatic payment each month using the card details you originally placed your order with.
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How long is the contract?The SIM Warehouse offers three choices of contract terms. 24 Months, 12 Months and Monthly Rolling plans. Choose the best option for you.
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Can I keep my current number?Yes, just request a PAC code from your old provider and transfer your number to your new SIM-only contract quickly and easily.
