iD Mobile's best SIM only deals: 108GB for £9, 20GB for £6
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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: 17th April 2025.
iD Mobile's best SIM only deals
Our highest-rated SIM only deal on iD Mobile this month
just
£9
a month
✔ Unlimited mins and 108GB data See full deal
at idmobile.co.uk
(opens in new window)
Out of all the SIM only plans available this April on iD Mobile, we'd say their best value deal is their 12‑month SIM below, which gets you 108GB data, plus unlimited minutes and texts for £9 a month:
Unlimited minutes + Unlimited texts + 108GB data (5G) = £9 a month (12‑month contract)
See full deal
iD's is actually the best-priced SIM only deal in the UK at the moment for 108GB data or more. No other providers can beat it for monthly cost. Here's each network's nearest plan:
Unlimited minutes + Unlimited texts + 120GB data (5G) = £12 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + 120GB 150GB data (5G) = £11.95 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + 250GB data (5G) = £22 £12 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + 100GB 175GB data (5G) = £27 £14 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + 120GB data (5G) = £16 £8 a month for 6 months, then £16 (24‑month contract)
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Unlimited minutes + Unlimited texts + 150GB data (5G) = £15 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 £20 a month (24‑month contract)
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Unlimited minutes + Unlimited texts + 200GB data (5G) = £20 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 120GB 200GB data (5G) = £20 a month (18‑month contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £11.50 a month for 6 months, then £23 (24‑month contract)
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🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice
Unlimited minutes + Unlimited texts + 150GB data (5G) = £21 a month (24‑month contract)
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🛈 Increased to: £22.50 on April 1 2026.
Increased to: £24.00 on April 1 2027
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £12.50 a month for 1 month, then £25 (1‑month contract)
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🛈 Prices reduce over time!
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £27 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £29 £27 a month for 12 months, then £29 (12‑month contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £29.90 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £35 £30 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £39 £31.20 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + 200GB data (5G) = £35 a month (1‑month plan, no contract)
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They've also got a 20GB for £6 SIM plan at the moment
just
£6
a month
✔ Unlimited mins and 20GB data See full deal
at idmobile.co.uk
(opens in new window)
For a smaller amount of data, another option for you on iD is their 1‑month SIM below, which costs £6 a month for 20GB data and comes with unlimited minutes and texts:
Unlimited minutes + Unlimited texts + 20GB data (5G) = £6 a month (1‑month contract)
See full deal
If you don't need your SIM to be on a provider that uses the Three network, you can beat this deal elsewhere. But if you do, it's the cheapest 20GB data or more option. See the networks that beat it here:
Unlimited minutes + Unlimited texts + 25GB data (5G) = £14 £5.99 a month (12‑month contract)
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iD's £8 for 60GB is our next best choice now
just
£8
a month
✔ Unlimited mins and 60GB data See full deal
at idmobile.co.uk
(opens in new window)
For people who need more data, iD have got a £8 deal on SIM only we think's worth looking at. It gets you 60GB data, unlimited minutes and texts and it's a 1‑month plan:
Unlimited minutes + Unlimited texts + 60GB data (5G) = £8 a month (1‑month contract)
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Compared to iD's other deals, this comes out among the best. But it's worth knowing you can get a lower price elsewhere, even on other providers that use the Three network. Here are the networks where it'd cost less:
Unlimited minutes + Unlimited texts + 50GB 60GB data (5G) = £7.95 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + 40GB 60GB data (5G) = £10 £8 a month for 15 months, then £10 (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 25GB 60GB data (5G) = £16 £8 a month (12‑month contract)
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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