Out of data?
Fiver is the data bolt on eSIM your network provider doesn't want you to know about
Fiver bolt on
5GB
£5
30 days (no need to cancel)
Works alongside your existing sim
eSIM Delivered Instantly
How we compare
| Network | What £5.00 gets you | 5GB or more | Lasts 30 days | Instant eSIM | Nothing to cancel | Open to all |
|---|---|---|---|---|---|---|
| Fiver Bolt On5GB for £5.00, 30 days | 5GB of UK data for £5.00, valid 30 days | 5GB or more: yes | Lasts 30 days: yes | Instant eSIM: yes | Nothing to cancel: yes | Open to all: yes |
| EEA single day of unlimited data, if you are already an EE customer. Fine for one day, but a fiver a day adds up fast | A single day of unlimited data, if you are already an EE customer. Fine for one day, but a fiver a day adds up fast | 5GB or more: yes | Lasts 30 days: no | Instant eSIM: yes | Nothing to cancel: yes | Open to all: no |
| O2100MB for £5.50, which is gone before you have finished reading this | 100MB for £5.50, which is gone before you have finished reading this | 5GB or more: no | Lasts 30 days: yes | Instant eSIM: yes | Nothing to cancel: yes | Open to all: no |
| ThreeNothing at a fiver. The cheapest one day Boost is £9 | Nothing at a fiver. The cheapest one day Boost is £9 | 5GB or more: no | Lasts 30 days: no | Instant eSIM: yes | Nothing to cancel: no | Open to all: no |
| VodafoneDepends on your plan, and they will not tell you until you log in | Depends on your plan, and they will not tell you until you log in | 5GB or more: no | Lasts 30 days: yes | Instant eSIM: yes | Nothing to cancel: no | Open to all: no |
| iD MobileNot quite a fiver. £6 buys 1GB and a whole new monthly plan | Not quite a fiver. £6 buys 1GB and a whole new monthly plan | 5GB or more: no | Lasts 30 days: yes | Instant eSIM: yes | Nothing to cancel: no | Open to all: yes |
| SMARTY2GB a month on a data only SIM, or 5GB with calls for £6 | 2GB a month on a data only SIM, or 5GB with calls for £6 | 5GB or more: no | Lasts 30 days: yes | Instant eSIM: yes | Nothing to cancel: no | Open to all: yes |
| Lebara5GB with calls and texts, on a plan that bills you again in 30 days | 5GB with calls and texts, on a plan that bills you again in 30 days | 5GB or more: yes | Lasts 30 days: yes | Instant eSIM: no | Nothing to cancel: no | Open to all: yes |
| giffgaffA top up. Their goodybags start above a fiver | A top up. Their goodybags start above a fiver | 5GB or more: no | Lasts 30 days: yes | Instant eSIM: no | Nothing to cancel: no | Open to all: yes |
| VOXINothing. Their entry plan is £10 a month for 20GB | Nothing. Their entry plan is £10 a month for 20GB | 5GB or more: no | Lasts 30 days: yes | Instant eSIM: yes | Nothing to cancel: no | Open to all: yes |
| Tesco Mobile500MB, plus minutes and texts you were not asking for | 500MB, plus minutes and texts you were not asking for | 5GB or more: no | Lasts 30 days: yes | Instant eSIM: no | Nothing to cancel: no | Open to all: yes |
| Honest MobileNothing near it. Their smallest plan is £12.15 a month for 4GB | Nothing near it. Their smallest plan is £12.15 a month for 4GB | 5GB or more: no | Lasts 30 days: yes | Instant eSIM: yes | Nothing to cancel: no | Open to all: yes |
Where these numbers came from
Read off each network's own pages on 2 August 2026. They change them without telling us, so have a look before you buy.
The questions everyone asks
- Do I keep my number, and will WhatsApp still work?
- Yes to both. Your normal SIM keeps your number, your calls and your texts, and Fiver only carries data. WhatsApp, iMessage and anything that texts you a code carry on as normal.
- Does my normal SIM stay switched on?
- It does. Fiver is digital, so nothing goes in your SIM tray. You point your mobile data at Fiver for a few days and then point it back.
- Do I need to tell my network?
- No. Your contract, your plan and your bill all stay exactly as they are, so there is nothing for them to know about.
- What if 5GB is not enough?
- Buy another one whenever you want. It is still a fiver each time and there is still nothing to cancel.
- How do I cancel Fiver?
- There is nothing to cancel. It runs out on its own and you never hear from us again unless you come back. Unless you mean you didn't activate your eSim in which case simply hit the request a refund button in your My Fiver area.
Not sure about your phone? Buy it and try — if you don't activate the eSIM, we refund you in full, no quibble. Wondering something else? Read the rest of the answers.
Out of data?
Five pounds, 5GB, about a minute of your time, and then you can go back to whatever you were doing.