Three SIM only deals
Written by William Haymonds, MoneyHQ founder and deal editor. Last reviewed . How we check deals
Our pickNo credit check
Three, Unlimited dataMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money
- One-month rolling
- Nothing upfront
- No mid-contract rise stated
£31.50a month
Go to deal: Three, Unlimited data, £31.50 a monthUnlimited data on Three for £31.50 a month: no credit check, and you can leave with a month's notice.
How we chose it
The lowest monthly price among the one-month plans on this page with at least 30GB from a network that states it runs no credit check on them. Read live from our comparison partner.
Three says its pay as you go needs no credit check, because you pay up front. Read on Three's own site on 23 October 2026. Their own statement.
Sold by 3 Store. MoneyHQ may earn a commission if you take it.
Deals come from our comparison partner and MoneyHQ may earn a commission if you take one.
Quick answer · figures checked 2 November 2026
- What is the lowest Three SIM only price?
- On 2 November 2026 the lowest monthly price we saw on Three was £6 a month for 1GB on 24 months. That deal states a rise: £7.80 from Apr 2027, then £9.60 from Apr 2028.
- How much is unlimited data on Three?
- The lowest unlimited-data price we saw on Three was £12.42 a month on 12 months, one of 4 unlimited plans in the comparison.
Three has 30 SIM only plans on MoneyHQ right now, starting from £6 a month. Every plan includes unlimited calls and texts, 5G at no extra cost, and data usable in 71 destinations abroad (included on Value and Complete plans; Lite plans pay a daily charge).
The cheapest unlimited data plan starts from £12.42 a month (with £55 cashback) on a 12-month contract or £17 per month without cashback, which is among the lowest unlimited rates on a main UK network.
Which Three SIM only plan should you pick?
If you want the lowest monthly cost: The 1GB plan starts at £6/month on a 24-month contract, but it rises to £7.80 from April 2027 and £9.60 from April 2028. The true cost over 24 months is higher than it looks on the headline price, so make sure to factor that in when choosing a SIM.
If you want flexibility: One of Three’s plans are rolling one-month contracts. The cheapest is Unlimited for £31.50/month with no credit check which allows you to pay for one month then leave the next if needed.
If you want unlimited data: Three’s unlimited plans start from £12.42/month on 12 months on a deal that also pays £55 cashback, which is cheaper than most networks’ unlimited options for example iD Mobile’s and Rewild’s cheapest rolling unlimited is £14/month by comparison.
If you travel: Three’s Value and Complete plans include roaming in 71 destinations with calls, texts and data all working the same as at home; Lite plans pay a daily charge to roam.
What to watch on Three SIM only plans
Mid-contract price rises: All 29 of Three’s fixed-term plans include a stated mid-contract price rise. On the cheapest 24-month plan, those rises add an extra £46.80 to the total cost. So make sure to always check the stated rise before signing, at MoneyHQ it will always be shown in the plan details above.
5G coverage: Three covers around 99% of the UK population for 4G. 5G is expanding but still mainly covers city centres, if you’re in a rural area, check a coverage checker like Ofcom’s coverage checker before committing to a 12 or 24-month plan.
No credit check options: Three states its pay-as-you-go plans need no credit check (as you pay upfront). Among SIM only plans, the Unlimited rolling plan via Three is listed as no credit check which can be useful if you’re building your credit score or prefer not to have a search on your file.
How Three compares to other networks
| Network | Cheapest unlimited data | Mid-contract rises |
|---|---|---|
| Three | £12.42/month | Yes, every April |
| O2 | £23/month | Yes, every April |
| Vodafone | £26/month | Yes, every April |
| EE | £26/month | Yes, each year |
| iD Mobile | £14/month | No price rises |
| SMARTY | £17/month | No price rises |
Accurate as of 2 November 2026. Prices from our panel, read live; EE from EE's own site, 28 October 2026, as EE is not on our panel.
Also from Three: home broadband
Three also offers 5G home broadband which is a router that works anywhere Three has 5G signal. Since it’s 5G there’s no engineer visit and no fixed line needed. Average speeds and pricing on our Three broadband review page.
Every SIM only deal on our panel, Three’s and every other network’s.
Compare all SIM only dealsSources
- Prices: MoneyHQ SIM only comparison, read live
- Three: Go Roam (which plans include roaming)
- Three: our network
- Ofcom coverage checker
- EE SIM only deals
- MoneyHQ Three broadband
Last reviewed .
What Three SIM only really costs
Across 30 Three SIM only plans, the lowest true monthly cost is £7.95 a month (1GB, £6 a month, 24 months).
By data allowance
| Data | Plans | Lowest true cost a month | That plan |
|---|---|---|---|
| Up to 10GB | 4 | £7.95 | 1GB, £6 a month, 24 months |
| 11GB to 50GB | 8 | £8.11 | 12GB, £7 a month, 12 months |
| 51GB to 150GB | 9 | £9.11 | 60GB, £8 a month, 12 months |
| Over 150GB | 5 | £15.34 | 250GB, £14 a month, 12 months |
| Unlimited | 4 | £13.76 | Unlimited data, £12.42 a month, 12 months |
By contract length
| Contract | Plans | Lowest true cost a month | That plan |
|---|---|---|---|
| Rolling monthly | 1 | £31.50 | Unlimited data, £31.50 a month, rolling monthly |
| 12 months | 19 | £8.11 | 12GB, £7 a month, 12 months |
| 24 months | 10 | £7.95 | 1GB, £6 a month, 24 months |
Three against the other networks
Against the network that charges least for as much data or more.
| Data | Difference | Three | Lowest elsewhere |
|---|---|---|---|
| Up to 10GB | £5.45 morea month | £7.95 1GB, 24 months | £2.50 Mozillion, 1GB, 24 months |
| 11GB to 50GB | £2.16 morea month | £8.11 12GB, 12 months | £5.95 TalkMobile, 20GB, rolling |
| 51GB to 150GB | £1.16 morea month | £9.11 60GB, 12 months | £7.95 TalkMobile, 60GB, rolling |
| Over 150GB | £1.34 morea month | £15.34 250GB, 12 months | £14 iD Mobile, 250GB, rolling |
| Unlimited | £0.24 lessa month | £13.76 Unlimited data, 12 months | £14 iD Mobile, Unlimited data, rolling |
Price rises
29 of 29 fixed-term plans state a mid-contract rise. On the lowest of those, the rises add £46.80 over 24 months.
Three SIM only plans right now
30 plans, £6 to £31.50 a month. 4 with unlimited data. 30 on 5G. 1 rolling one-month. 29 state a mid-contract rise.
| Data | A month | Contract | Sold by | Rise | Go to deal |
|---|---|---|---|---|---|
| 1GB · 5G | £6 | 24 months | Fonehouse | £7.80 from Apr 2027, then £9.60 from Apr 2028 | Get deal: Deal on Three, £6 a monthMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money |
| 12GB · 5G | £7 | 12 months | Mobile Phones Direct | £8.90 from Apr 2027 | Get deal: Deal on Three, £7 a monthMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money |
| 8GB · 5G | £7 | 12 months | Mobile Phones Direct | £8.90 from Apr 2027 | Get deal: Deal on Three, £7 a monthMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money |
| 8GB · 5G | £7 | 12 months | Fonehouse | £8.90 from Apr 2027 | Get deal: Deal on Three, £7 a monthMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money |
| 60GB · 5G | £8 | 12 months | 3 Store | £9.90 from Apr 2027 | Get deal: Deal on Three, £8 a monthMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money |
| 8GB · 5G | £8 | 24 months | Fonehouse | £9.90 from Apr 2027, then £11.80 from Apr 2028 | Get deal: Deal on Three, £8 a monthMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money |
| 25GB · 5G | £8 | 24 months | 3 Store | £9.90 from Apr 2027, then £11.80 from Apr 2028 | Get deal: Deal on Three, £8 a monthMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money |
| 30GB · 5G | £8.75 | 12 months | Mobile Phones Direct | £10.65 from Apr 2027 | Get deal: Deal on Three, £8.75 a monthMoneyHQ may earn a commission if you take this deal. It never changes the price you pay or the order deals are shown in. How we make money |
Read from our comparison partner’s feed on 2 November 2026. Providers set the prices and can change them. Tables built automatically by rules MoneyHQ sets: ordered by what deals cost, never by commission. How we make money.
Frequently asked questions about Three SIM only deals
What is the cheapest Three SIM only deal?
The cheapest Three SIM only plan on MoneyHQ is £6/month for 1GB on a 24-month contract. The cheapest rolling monthly plan is £31.50/month for Unlimited. Prices and availability change all the time, so use the table above to see what’s live today.
Does Three do unlimited data SIM only?
Yes. Three offers unlimited data SIM only plans from £12.42/month on a 12-month contract. All unlimited plans include 5G and unlimited calls and texts.
Do Three SIM only prices go up mid-contract?
Yes, all of them do. All 29 of Three’s fixed-term plans include a stated mid-contract price rise. The rise is shown in the plan details which is worth checking before signing, as it affects the true monthly cost over the full term, meaning the cheapest headline rate may be more expensive over the contract.
Can I get a Three SIM with no contract?
Yes, Three offers rolling one-month SIM only plans. The cheapest is currently Unlimited for £31.50/month with no long-term commitment and no credit check.
Does Three SIM work abroad?
Yes. Three’s Value and Complete plans include roaming in 71 destinations at no extra cost, with your data, calls and texts working the same as at home. On Lite plans there’s a daily charge to roam.
Is Three 5G?
All 30 Three SIM only plans on MoneyHQ include 5G at no extra cost. Three’s 5G network is live in most UK cities, with 4G covering around 99% of the UK population as a fallback.