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iD Mobile's best SIM only deals: 108GB for £9, 20GB for £6

iD Mobile logo with a SIM cardVisit idmobile.co.uk

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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

iD Mobile SIM only deal
SIM only
just
£9
a month
🛈 No annual price rises

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:

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:

ASDA Mobile logo

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £11.50 a month for 6 months, then £23 (24‑month contract)
See full deal

150 Mbps speed cap
🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice
EE logo

Unlimited minutes + Unlimited texts + 0MB 150GB data (5G) = £0 £21 a month (24‑month contract)
See full deal

Speed capped to 100 Mbps
🛈 Increased to: £22.50 on April 1 2026.
Increased to: £24.00 on April 1 2027
VOXI logo

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £35 £30 a month (1‑month plan, no contract)
See full deal

🛈 VOXI reserve the right to increase the cost of this plan annually with one month's notice
Coop Mobile logo

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £39 £31.20 a month (1‑month contract)
See full deal

🛈 Monthly price will increase each March by the Consumer Price Index rate of inflation published in January + 3.9%
Talk Home logo

Unlimited minutes + Unlimited texts + 0MB 200GB data (5G) = £0 £35 a month (1‑month plan, no contract)
See full deal

🛈 Talkhome reserve the right to increase the cost of this plan annually with one month's notice

They've also got a 20GB for £6 SIM plan at the moment

iD Mobile SIM only deal
SIM only
just
£6
a month
🛈 No annual price rises

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:

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:

ASDA Mobile logo

Unlimited minutes + Unlimited texts + 0MB 25GB data (5G) = £14 £5.99 a month (12‑month contract)
See full deal

🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice

iD's £8 for 60GB is our next best choice now

iD Mobile SIM only deal
SIM only
just
£8
a month
🛈 No annual price rises

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:

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:

Compare all SIM only plans

Compare deals from all networks

How iD Mobile's deals compare with other networks

SIM card with magnifying glass

Networks

Providers:

1p Mobile logo
Three logo
ASDA logo
Coop Mobile logo
EE logo
giffgaff logo
Honest logo
ID logo
Lebara logo
Lycamobile logo
O2 logo
SMARTY logo
Sky logo
spusu logo
Talkhome logo
Talkmobile logo
Tesco logo
Vodafone logo
VOXI logo

Plan

Data: (0MB+)

Minutes: (0+)

Contract

Maximum length: (Any)

Added features

More about iD's SIM only plans

How iD’s benefits and SIM only prices stack up

Rating stars and iD Mobile logo

We go over everything in our iD reviewRead our full review

at simsherpa.com
(opens in new window)

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

Screenshot of iD network map

Check coverage in your areaCheck your signal

at idmobile.co.uk
(opens in new window)

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

Other iD Mobile guides