iD Mobile's best SIM only deals: 25GB for £6, 50GB for £7
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See how iD compare on price this month vs the competition on SIM only. We've checked each of their plans to find the best. Last updated: 6th April 2026.
iD Mobile's best SIM only deals
Our favourite SIM only deal of the month on iD Mobile
just
£6
a month
✔ Unlimited mins and 25GB data See full deal
at idmobile.co.uk
(opens in new window)
We think the best value for money SIM only plan on iD Mobile for April is their discounted 25GB for £6 deal. It's on a 1‑month plan and comes with unlimited minutes and texts too:
It's certainly a good deal from iD. No other network can beat them for price on a SIM only plan with 25GB data or more. See under the dropdown to see how the competition it undercuts:
Or their £7 for 50GB SIM plan is worth a look too
just
£7
a month
✔ Unlimited mins and 50GB data See full deal
at idmobile.co.uk
(opens in new window)
If you need more data, we'd say this is one of iD's best deals on SIM only this month too. It's a discounted 1‑month plan, comes with 50GB data, unlimited minutes and texts for £7 a month:
There's not currently a better SIM only deal on the market than iD's one above if you want 50GB data or more. Here's the closest their competitors get for similar plans:
iD are also offering 80GB for £8 on SIM only
just
£8
a month
✔ Unlimited mins and 80GB data See full deal
at idmobile.co.uk
(opens in new window)
For even more monthly data, have a look at iD Mobile's discounted 80GB SIM below at £8 a month, as it's another good deal. It's on a 1‑month plan and comes with 80GB data, unlimited minutes and texts:
iD's is actually the best-priced SIM only deal in the UK at the moment for 80GB data or more. No other providers can beat it for monthly cost. Here's each network's nearest plan:
They've also got a 108GB for £9 SIM plan at the moment
just
£9
a month
✔ Unlimited mins and 108GB data See full deal
at idmobile.co.uk
(opens in new window)
To get even more data, another option for you on iD is their discounted 1‑month SIM below, which costs £10 £9 a month for 108GB data and comes with unlimited minutes and texts:
That’s £12 you’d save over a year on the same deal, thanks to the £1 monthly discount.
You can't actually currently beat iD's prices there for a SIM only deal with 108GB data or more on any other provider. Here are the closest alternatives each network is currently offering:
iD's £15 for unlimited data is our next best choice now
just
£15
a month
✔ Unlimited mins and unlimited data See full deal
at idmobile.co.uk
(opens in new window)
For people who need even more data, iD have got a discounted £18 £15 deal on SIM only we think's worth looking at. It gets you unlimited data, unlimited minutes and texts and it's a 1‑month plan:
That means a total saving of £36 if you added up that £3 monthly discount over a whole year.
There aren't any other networks with cheaper pricing on a SIM only deal with unlimited data than iD. If you want to see other providers' nearest efforts, use the dropdown below:
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How iD’s benefits and SIM only prices stack up
In our review of iD Mobile, we said we liked that they offered full access to Three’s network (including identical 5G speeds and coverage) on low-cost deals. And they have an excellent WiFi calling scheme as well.
You can choose either a 1-month, 12-month or 24-month contract on iD. It tends to be the case that longer contracts cost you less per month. But it’s still worth checking to see what their best current deals are.
iD tend to offer great value on all their SIM only plans, and the cost of your plan won’t increase during your contract so you can hold onto that value. They’re usually one of the cheapest ways onto Three’s network.
They’re fairly low-frills, but they do have a good data rollover scheme that lets you keep unused data for your next month. They also offer inclusive EU roaming. But they don’t offer much else.
Useful link: Read our full iD Mobile review
What else you should know about iD’s SIM only plans
Your iD Mobile SIM card will be delivered within 2-3 working days after ordering. You’ll get each size of SIM card in your package to fit any phone. iD don’t offer eSIMs yet (see the providers that do here).
When you order anything online you have 14 days to get a full refund, and this is also the case for SIM cards. Here’s how you can get a refund if you’re unhappy with your SIM.
You’ll have to pass a credit check to join iD, no matter if you want to join on a 1-month, 12-month or 24-month contract. If you’ve been rejected for a contract you can still join on a PAYG monthly bundle.
If you’re switching from one network to get onto iD Mobile then you can keep your number by requesting a PAC from your current provider to give to iD. Here’s more info on how to do that.
Useful link: Compare all iD SIMs