Chattr or VOXI: which SIM gives more for your money?
Chattr, for unlimited data: £3.75 for month one with HONEST75, then £15 dropping to £13, against £35 a month for VOXI Unlimited. VOXI earns its place on capped plans for social-heavy users, and pays a gift card through its referral link.
Up to £40 gift card
75% off month one: unlimited for £3.75
Key takeaways
- Unlimited: Chattr £3.75 then £15 falling to £13 with HONEST75; VOXI £35 a month.
- Twelve payments on unlimited: about £161 on Chattr, £420 on VOXI.
- VOXI's capped plans keep selected social apps off the allowance; its £20 plan adds 100GB with unlimited social, music and video.
- VOXI's referral pays a gift card after two paid months via https://topreferrals.co.uk/go/voxi; Chattr's code cuts the first month by 75%.
- Chattr includes roaming in 43 European destinations; VOXI sells a Roaming Pass from £2.45 a day.
Our pick here: VOXI pays Up to £40, verified against its own terms.
Chattr and VOXI are both rolling, no-contract SIMs. They pull in different directions: Chattr leads on the price of unlimited data, while VOXI leads on social apps that do not use your allowance.
Unlimited data
This is where the two differ most. VOXI Unlimited is £35 a month. Chattr's Freedom One is £3.75 for the first month with HONEST75, then £15, falling to £14 and to £13 from month 12. Over twelve payments that is about £161 on Chattr and £420 on VOXI, a difference of more than £250 for the same unlimited data.
Capped plans and social apps
VOXI's own strength is on capped plans. Selected social apps never touch the allowance on any VOXI plan; music apps are added from £12 and video apps, YouTube included, from £15. At £20, VOXI gives 100GB with all three. Someone whose data goes mostly on those apps can manage on a VOXI plan below unlimited. At £15, the same money that buys VOXI's 35GB plan (140GB under its offer to 30 September 2026) buys Chattr's unlimited data for every app.
Sign-up offers
The two reward new customers differently. Chattr's HONEST75 takes 75% off the first payment at checkout. VOXI pays a gift card — Amazon.co.uk, Just Eat or PayPal cash, sized by plan — after two paid months, when you join through https://topreferrals.co.uk/go/voxi with no promo code.
Abroad
Chattr includes roaming in 43 European destinations using your UK allowance. VOXI sells a European Roaming Pass from £2.45 a day. For anyone in Europe several times a year, Chattr's included roaming saves that daily charge.
Which to choose
For unlimited data, Chattr, clearly: https://topreferrals.co.uk/go/chattr with HONEST75. For social-first use on a capped plan with a gift card for joining, VOXI through https://topreferrals.co.uk/go/voxi. Both networks' prices were read on their own sites in September 2026, and HONEST75 was tested at Chattr's checkout on 24 September 2026.
Side by side
| Chattr | VOXI | |
|---|---|---|
| Unlimited plan | £3.75 month one, then £15 → £13 | £35 a month |
| Twelve payments, unlimited | About £161 | £420 |
| £15 plan | Unlimited data | 35GB (140GB to 30 Sep 2026) + unlimited social, music, video |
| Sign-up offer | HONEST75: 75% off month one | Gift card after two months via referral |
| Network | O2 or Vodafone | Vodafone and Three |
| Europe | 43 destinations included | Roaming Pass from £2.45 a day |
| Contract | None | None |
| Code or link | HONEST75 + https://topreferrals.co.uk/go/chattr | https://topreferrals.co.uk/go/voxi, no code |
Frequently asked questions
Which is cheaper for unlimited data, Chattr or VOXI?
Chattr. Freedom One is £3.75 for the first month with HONEST75, then £15 falling to £13. VOXI's Unlimited plan is £35 a month.
Can I use a discount code on VOXI?
Not if you want the referral reward: VOXI's terms say a promo code at checkout invalidates it. Join through https://topreferrals.co.uk/go/voxi with no code instead.
Which is better for social media?
On a capped plan, VOXI: selected social apps do not use your allowance. On Chattr's Freedom One all data is unlimited, social included.
Which is better for trips to Europe?
Chattr includes roaming in 43 European destinations on your UK allowance. VOXI charges for a European Roaming Pass, from £2.45 a day.
Compared, verified and link-tested — here's where to go next.
Last checked 24 September 2026. Figures verified against each brand's own terms. How we check.