SIM Only unlimited data plans
Unlock endless possibilities with our range of great-value SIM only unlimited data plans. Find yourself regularly running out of data? Our unlimited SIM data deals are there to keep you constantly connected.
Keep hold of your current handset while enjoying all the freedom you could ever need, from non-stop 5G streaming to gaming on the go.
Terms & Conditions
1 Inclusive roaming is included as standard on all iD Mobile plans, allowing customers to use their inclusive UK minutes, texts, and data in 50 inclusive Roaming destinations. A 30GB data limit applies in line with the Fair Usage Policy, for further information, please see here.
2 Unused monthly data rolls over once into the next month and is used first. Rollover data expires after one month. Available on all iD Mobile pay‑monthly plans.
3 Average saving based on pricing of new SIM only plans, between 28th Nov and 19th Feb 2026. Comparing the effective monthly cost of plans on idmobile.co.uk vs. network's direct price (Vodafone, O2, EE and Three).
Why choose a SIM only unlimited data plan?
If you want to get more from your phone without breaking the bank, this is the option for you. Since there’s no cost of a new handset included in your plan, it’s a more affordable option than a brand-new pay monthly phone contract.
You’ll never run out of data again: say goodbye to data warnings, unexpected charges and missed messages when you’ve used your allowance for the month. Stream, scroll and video call without limits, all while keeping hold of your existing handset.
Whether you need a flexible 30-day deal or a longer-term 24-month contract, a SIM only unlimited data plan gives you the freedom to find the contract that works for you.
What SIM card do I need?
Getting connected to your new SIM only plan is simple and hassle-free thanks to multi-fit SIM cards. This is a clever 3-in-1 design that contains all common SIM card sizes. Simply insert the size that fits your current phone's SIM tray, and you’ll be ready to connect.
All of our unlimited data SIM plans are now compatible with an eSIM , making it even more simple to switch or update your SIM.
Can I use my unlimited SIM abroad?
Yes! With free roaming in 50 destinations worldwide, you can use your phone just like you would usually do at home. There’s 30GB roaming allowance to play with each month - that's plenty of data to sightsee, sunbathe and more.
FAQs.
- Unlimited Data, Unlimited Minutes, Unlimited Texts, £16.00 p/m
- Unlimited Data, Unlimited Minutes, Unlimited Texts, £16.00 p/m
- Unlimited Data, Unlimited Minutes, Unlimited Texts, £18.00 p/m
Switching to our network whilst keeping your existing number is quick and easy. Simply request a PAC code from your current provider by texting ‘PAC’ to 65075, give this to us when you sign up, and we’ll take care of the rest.
Yes. All our unlimited data plans include unlimited tethering. You can use your phone as a personal hotspot for your laptop, tablet, or any other device without any extra charges.
5G is available at no extra cost on our SIM only unlimited data plans. If you have a 5G-compatible phone and you’re in an area with 5G coverage, you can enjoy super smooth scrolling, streaming, and gaming.
Legal stuff.
Our fair usage policy applies to all pay monthly phone, SIM Only and Pay-as-you-go plans. Our open data policy applies to selected plans.
Save an average of £130 per year on SIM only plans at iD Mobile vs major network Average saving based on pricing of new SIM only plans, between 28th Nov and 19th Feb 2026. Comparing the effective monthly cost of plans on idmobile.co.uk vs. network's direct price (Vodafone, O2, EE and Three). iD Mobile were cheaper for 100.0% of the 198 like-for like plans matched. Match criteria: same contract length, minutes, texts and data combination. Total cost of ownership is calculated by: ((monthly cost x contract length) – (discounted line rental x discounted months) – cashback) / contract length. For verification see idmobile.co.uk/averagesave.
SIM only plans are not subject to annual CPI or RPI price increases. Full terms and conditions apply.
Get up to 2 months free Apple Music, Apple Fitness+ & Apple Arcade on selected purchases at idmobile.co.uk or third party affiliate partners, from 21st November 2025 until further notice. Offer available on all iPhone, Android and SIMO purchases made during the promotional period. Cannot have already redeemed any Apple service (Apple Music, Apple Fitness+ and Apple Arcade) from Currys group and our third party affiliate partners. Returning Apple Music, Apple Arcade and Apple Fitness+ customers will only receive 1 month free.
Cancel anytime. After the free period Apple Fitness+ costs £9.99 p/m or £79.99 annually, Apple Arcade is £4.99 p/m, and Apple Music is £9.99 p/m. One subscription per Apple ID. Redeem via links on iD Order Confirmation page, Order Confirmation email or email from iD sent 12 day after purchase. Restrictions and other terms apply.
UK only. New and returning iD customers only. 11 December 2024 until further notice. £29.99 annual subscription price will be charged after trial unless cancelled. Visit here for full terms and conditions.