iD Mobile's best SIM only deals: 25GB for £6, 108GB for £9
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See how we rate each of the choices on iD's SIM only, compared with other UK mobile networks' closest plans. Last updated: 1st June 2026.
iD Mobile's best SIM only deals
Our highest-rated SIM only deal on iD Mobile this month
just
£6
a month
✔ Unlimited mins and 25GB data See full deal
at idmobile.co.uk
(opens in new window)
Looking at what you can get on SIM only with iD Mobile this June, our best-rated deal would be their discounted 1‑month plan below, which comes with 25GB data, plus unlimited minutes and texts for £6 a month:
This is actually the leading price in the UK at the moment for a SIM only deal with 25GB data or more. The plans under the dropdown are the next nearest you can get to iD with other providers:
Their £9 for 108GB plan is a decent deal for June
just
£9
a month
✔ Unlimited mins and 108GB data See full deal
at idmobile.co.uk
(opens in new window)
If you need more data, our next best pick of iD Mobile SIM only plans is their discounted 1‑month £10 £9 deal below, which gets you 108GB data and unlimited minutes and texts:
It’s a discount of £1 a month against the full price, adding up to a £12 saving over a year.
Compare this with similar deals from other networks with 108GB data or more and you'll find iD's actually comes out best on price. Have a look at the nearest other providers get for comparable SIM only deals:
They're also offering 50GB for £7 on SIM only currently
just
£7
a month
✔ Unlimited mins and 50GB data See full deal
at idmobile.co.uk
(opens in new window)
If you need less data, iD Mobile are also offering this discounted £7 SIM, which includes 50GB data, unlimited minutes and texts on a 1‑month plan. It's another of their best deals:
It's currently the best priced 50GB data or more SIM only deal on a provider using the Three network, even if you can beat it on price if you're open to ones not on Three. Here's which other networks can beat it:
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How iD Mobile's deals compare with other networks
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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