The quick answer
Choose Chattr for the cheapest unlimited data (£15, dropping to £13). Choose 1pMobile for big data bundles at low prices (50GB £10, 200GB £20), free EU roaming, and family SIMs.
Side by side
| Chattr | 1pMobile | |
|---|---|---|
| Cheapest plan | £15 (unlimited) | £5 (5GB) |
| Unlimited data | £15, then £14, then £13 | £25 (extra SIMs £12.50) |
| Mid-size data | n/a | 50GB £10 · 100GB £15 · 200GB £20 |
| Contract | None, cancel anytime | 30-day rolling |
| Credit check | No | No contract |
| EU roaming | Check before you travel | 46 destinations included (14GB cap) |
| Pay yearly | No | Yes, from £48 a year |
Who should pick Chattr?
Heavy users who want genuinely unlimited data at the lowest price, and who like a price that falls over time. Read our Chattr review.
Who should pick 1pMobile?
Anyone using up to 200GB, families sharing unlimited data, and anyone who travels in Europe. Read our 1pMobile review.
Last updated 2 November 2026. Prices are checked on providers' own websites and can change. Bubblely may earn a commission if you buy through our links; it never changes the price you pay.