Home / SIM-only deals / 1-month rolling SIMs
Rolling SIM-only plans run month to month. There's no 12 or 24-month contract, so you can change plan, switch network or cancel with 30 days' notice or less. Here's every rolling deal we list, cheapest first.
The cheapest 1-month SIM we list is £5 a month: 5GB of 5G data from 1pMobile, or 3GB from Asda Mobile. For more data, iD Mobile has 80GB for £10 a month on a rolling plan. The cheapest rolling unlimited data SIM is Chattr at £15 a month. Prices checked on 5 November 2026.
"Recommended" considers value and the commission we earn. How we rank deals.
ChattrUnlimitedSIM only
Rewild MobileEco pickSIM only
Asda MobileSIM only
Asda MobileSIM only
Asda MobileSIM only
iD MobileSIM only
iD MobileSIM only
iD MobileSIM only
iD MobileSIM only
Asda MobileSIM only
iD MobileSIM only
1pMobileBest valueSIM only
1pMobileSIM only
1pMobileSIM only
1pMobileSIM only
1pMobileSIM only
Try a bigger budget, less data or any contract length.
| 1-month rolling | 12 or 24-month plan | |
|---|---|---|
| Leave or switch | Any month, usually with 30 days' notice or less | Early exit fees until the term ends |
| Price | Sometimes a little more per GB | Often more data for the same price, plus intro offers |
| Price rises | The network can change the price, but you can leave straight away | Fixed on many plans, but some networks add yearly rises |
| Best for | Trying a network, unsure how much data you need, or waiting for a better deal | Settled users who want the lowest monthly price |
Not sure how much data you need? Our data usage calculator works it out in 30 seconds, so you don't pay for data you won't use.
A SIM-only plan that renews every month with no minimum term. You pay monthly and can cancel or change plan, usually with up to 30 days' notice and no exit fee.
Not always. Some networks charge the same on rolling and 12-month plans, while others give extra data or intro discounts if you commit. Compare the price per GB on each plan above.
Yes. Text PAC to 65075 from your current phone to get a free switching code, then give it to your new network. Your number usually moves within one working day.
Many don't. Chattr says it runs no credit checks, and pay-monthly networks may run a light check. The network will tell you before you order.