Unlimited data SIM only deals
Every unlimited data SIM in our comparison, side by side: what it costs a month, how long you are tied in and whether the price rises mid-contract.
Deals come from our comparison partner and MoneyHQ may earn a commission if you take one.
Unlimited data plans right now
66 plans, £14 to £59.50 a month. 17 rolling one-month. 25 state a mid-contract rise.
| Network | Data | A month | Contract | Sold by | Rise |
|---|---|---|---|---|---|
| iD Mobile | Unlimited data | £14 | 12 months | Carphone Warehouse | No mid-contract rise stated |
| iD Mobile | Unlimited data · 5G | £14 | 12 months | mobiles.co.uk | No mid-contract rise stated |
| giffgaff | Unlimited data · 5G | £14 | 18 months | giffgaff | No mid-contract rise stated |
| Three | Unlimited data · 5G | £14.50 | 12 months | Mobile Phones Direct | £16.80 from Apr 2027 |
| iD Mobile | Unlimited data · 5G | £15 | Rolling | iD Mobile | No mid-contract rise stated |
| iD Mobile | Unlimited data · 5G | £15 | Rolling | mobiles.co.uk | No mid-contract rise stated |
| iD Mobile | Unlimited data | £15 | Rolling | Carphone Warehouse | No mid-contract rise stated |
| iD Mobile | Unlimited data · 5G | £15 | 12 months | mobiles.co.uk | No mid-contract rise stated |
Figures read from our comparison partner’s feed on 17 September 2026. Prices, allowances and rises are stated by each provider and can change.
Questions people ask
What is the lowest Unlimited data SIM only price?
On 17 September 2026 the lowest monthly price we saw on Unlimited data was £14 a month for Unlimited data on 12 months. That deal states no mid-contract rise.
How much is unlimited data on Unlimited data?
The lowest unlimited-data price we saw on Unlimited data was £14 a month on 12 months, one of 66 unlimited plans in the comparison.
Can I get a Unlimited data SIM with no contract?
Yes: 17 of the 66 Unlimited data plans we saw are rolling one-month plans you can leave with a month's notice.
Do Unlimited data SIM only prices rise mid-contract?
25 of the 66 plans state a rise, shown as a pound amount and a date on each deal above. Rolling plans can change price with notice but carry no lock-in.
Are Unlimited data SIM only deals 5G?
58 of the 66 plans we saw are 5G. Your phone must support 5G and you need 5G coverage where you use it.