# Best SIM only deals UK 2026: unlimited data from £3.75 and 30GB for £5, side by side

> Chattr has the cheapest unlimited start at £3.75 for month one with its code. Talkmobile gives 100GB at £4.98 a month for three months. Lebara halves any plan for three months, so 30GB is £5. Ecotalk and Lyca Mobile put unlimited data at £11 and £12.50 for month one. VOXI pays you a gift card of £10 to £20 on top of a plan from £10 a month.

Last checked: 2026-10-23. Page: https://topreferrals.co.uk/compare/best-sim-only-deals-uk-2026

## Key takeaways
- Chattr: 75% off month one with code HONEST75, so unlimited 5G is £3.75, then £15 falling to £13 by month 12. No contract, no credit check.
- Talkmobile: 100GB of 5G at £4.98 a month for the first 3 months of a 12-month plan, then £9.95. No credit check.
- Lebara: 50% off any SIM-only plan for 3 months, so 30GB is £5 instead of £10.
- Lyca Mobile and Ecotalk: half-price and £11 first months, with unlimited data from £12.50 and £11.
- VOXI: a £10, £15 or £20 gift card by plan, paid after two monthly payments, with no promo code.

## Compared offers
- **[VOXI](https://topreferrals.co.uk/referrals/voxi)** — you get Up to £20 (Up to £20 gift card).
  - Link: https://topreferrals.co.uk/go/voxi
- **[Chattr](https://topreferrals.co.uk/referrals/chattr)** — you get 75% off month one (75% off month one: unlimited for £3.75).
  - Code: `HONEST75`
  - Link: https://topreferrals.co.uk/go/chattr
- **[Talkmobile](https://topreferrals.co.uk/referrals/talkmobile)** — you get 100GB at £4.98 a month (100GB for £4.98 a month, first 3 months).
  - Link: https://topreferrals.co.uk/go/talkmobile
- **[Carphone Warehouse](https://topreferrals.co.uk/referrals/carphone-warehouse)** — you get Up to £50 cashback (Up to £50 iD Mobile cashback plus free next-day delivery).
  - Link: https://topreferrals.co.uk/go/carphone-warehouse
- **[Lebara](https://topreferrals.co.uk/referrals/lebara)** — you get 50% off for 3 months (50% off any SIM-only plan for your first 3 months).
  - Link: https://topreferrals.co.uk/go/lebara
- **[Lyca Mobile UK](https://topreferrals.co.uk/referrals/lyca-mobile)** — you get 50% off first month (Half price first 30 days: 30GB for £5, no credit check).
  - Link: https://topreferrals.co.uk/go/lyca-mobile
- **[Rewild Mobile UK](https://topreferrals.co.uk/referrals/rewild-mobile)** — you get £11.25/month, fixed (4GB SIM from £11.25/month, fixed price on 24 months).
  - Link: https://topreferrals.co.uk/go/rewild-mobile
- **[1pMobile](https://topreferrals.co.uk/referrals/1pmobile)** — you get Classic SIM for £5 (£5 Classic PAYG SIM, loaded with £10 credit).
  - Link: https://topreferrals.co.uk/go/1pmobile
- **[Ecotalk](https://topreferrals.co.uk/referrals/ecotalk)** — you get £11 first month (Unlimited data for £11 in your first month).
  - Link: https://topreferrals.co.uk/go/ecotalk
- **[Fonehouse](https://topreferrals.co.uk/referrals/fonehouse)** — you get 7 days, free next day (Free delivery by next day, seven days a week).
  - Link: https://topreferrals.co.uk/go/fonehouse

A SIM-only plan gives you data, calls and texts without a handset, and the best ones cost less than a takeaway a month. Nine UK deals are verified here. Each page shows you the exact first-month price, what it becomes, and how to claim it.

## Chattr: the cheapest unlimited start

[Chattr](/referrals/chattr) takes **75% off your first month** on any plan with code **HONEST75**. That turns unlimited 5G data, calls and texts on Freedom One into **£3.75**. From month two it is **£15**, then **£14**, then **£13 from month 12**.

There is no contract and no credit check, and roaming covers 43 European destinations. Open https://topreferrals.co.uk/go/chattr, choose a plan, and type the code at checkout.

**Take it if:** you want unlimited data from day one at the lowest start price.

## Talkmobile: 100GB for under £5

[Talkmobile](/referrals/talkmobile) sells 100GB of 5G data with unlimited minutes and texts at **£4.98 a month for the first 3 months** of a 12-month plan, then **£9.95**. It runs on the Vodafone network, with roaming in 47 European destinations and no credit check. 30-day plans start at £5.95 and leave with 30 days' notice.

**Take it if:** you want lots of data and a low price for a quarter.

## Lebara: half price on any plan

[Lebara](/referrals/lebara) takes **50% off any SIM-only plan for your first 3 months**. The 30GB plan costs **£5 instead of £10**, and the 5GB plan **£2.50 instead of £5**. There is no credit check and no annual price rise. You need an unlocked phone, and a promo code is revealed on Lebara's page.

**Take it if:** you want a mid-size plan at a flat half price.

## Lyca Mobile and Ecotalk: half-price and £11 starts

[Lyca Mobile](/referrals/lyca-mobile) halves its 30-day plans in the first month: **30GB for £5, 120GB for £10 and unlimited for £12.50**, with no contract or credit check. [Ecotalk](/referrals/ecotalk) charges **£11 for unlimited data in month one, then £22**, or **100GB at £12 a month for 3 months** against £18 normally. Both run on 30-day terms.

**Take it if:** you want a big plan for one cheap month and are happy to move on after.

## VOXI: a gift card on top of your plan

[VOXI](/referrals/voxi) pays you a gift card instead of a discount. Join through https://topreferrals.co.uk/go/voxi on a plan of **£10 a month or more**, pay for **two months within 60 days**, and VOXI sends **£10, £15 or £20** by plan. The **£20 plan** reaches the top tier. Pick Amazon.co.uk, Just Eat or PayPal cash. Use **no promo code** at checkout, because VOXI's terms say one, including the student code, invalidates the referral.

**Take it if:** you plan to stay for at least two months and want the reward.

## More SIM routes worth a look

- [Rewild Mobile](/referrals/rewild-mobile): a 4GB Everyday SIM at **£11.25 a month, fixed on 24 months**, with unlimited UK calls and texts and a free eSIM.
- [Carphone Warehouse](/referrals/carphone-warehouse): iD Mobile's Unlimited 12-month plan at £15.00 a month shows **£50 cashback**, and other SIM-only plans list cashback from £12 to £110, with free next-day delivery on orders placed before 8pm.
- [1pMobile](/referrals/1pmobile): a Classic pay-as-you-go SIM for **£5 with £10 credit**.
- [Fonehouse](/referrals/fonehouse): free next-day delivery seven days a week, and SIM-only 60GB 5G plans that add **£120 cashback**.
- [Your Co-op Broadband & Mobile](/referrals/your-co-op-broadband-mobile): a **free first month plus £5 to £25** on SIM plans for new members.

## How to choose a SIM-only deal

1. **Data you use.** 5GB suits light use. 30GB to 100GB covers most. Unlimited suits hotspots and streaming.
2. **How long the cheap price lasts.** Month one, three months or a fixed term: add up the first year, not just the headline.
3. **The price after.** Every intro price ends, so find the plan you would pay in month four.
4. **The contract.** 30-day plans let you switch again, while 12 and 24-month plans lock the price.
5. **Credit check and phone.** Most deals here skip the credit check, and you need an unlocked phone.

## Our verdict

**Chattr for the cheapest unlimited month, Talkmobile for the most data per pound, Lebara for a flat half-price start, and VOXI when you want a gift card for staying.** Because most plans here run on 30 days, you can claim one, then move to the next.

Mobile sign-ups also appear in our [Chattr vs VOXI](/compare/chattr-vs-voxi) comparison and the [VOXI referral verdict](/compare/is-voxi-referral-worth-it).

## Side by side

|  | Chattr | Talkmobile | Lebara | Lyca Mobile | Ecotalk |
| --- | --- | --- | --- | --- | --- |
| Headline deal | Unlimited 5G for £3.75 in month one | 100GB of 5G at £4.98 a month | 30GB for £5 a month | 30GB for £5 or unlimited for £12.50 in month one | Unlimited for £11 in month one |
| How long the price lasts | Month one | First 3 months | First 3 months | First 30 days | Month one |
| Then | £15, then £14, then £13 from month 12 | £9.95 | Full plan price (30GB £10) | Standard price (unlimited £25) | £22 |
| Contract | None | 12 months, or 30-day plans from £5.95 | 30-day or 12-month plans | 30-day pay-as-you-go plans | 30-day rolling |
| Credit check | None | None | None | None | Not stated |
| Code or link | Code HONEST75 or link | Link | Link, code revealed on its page | Link | Link |

## FAQ

### What is the cheapest SIM only deal in the UK right now?
For the first month, Chattr: unlimited 5G data, calls and texts for £3.75 with code HONEST75, then £15, falling to £13 from month 12. For the first three months, Talkmobile's 100GB plan is £4.98 a month and Lebara's 30GB plan is £5 a month. All three are verified against each brand's own site.

### What is the best SIM only deal for unlimited data?
Chattr's Freedom One is £3.75 in month one, Lyca Mobile's unlimited plan is £12.50 in month one against a standard £25, and Ecotalk's is £11 in month one, then £22. VOXI's £35 plan is unlimited too and pays a £20 gift card through our link. Which is cheapest over a year depends on how long the intro price lasts.

### Do these SIM only deals need a credit check?
Chattr, Talkmobile, Lebara and Lyca Mobile state no credit check. Ecotalk does not state a credit check on its deals page. SIM-only plans do not include a phone, so there is no handset to finance.

### Will the price go up after the intro period?
Yes, as shown in the table: Chattr moves to £15, Talkmobile to £9.95, Lebara to its full plan price, Lyca Mobile to its standard price and Ecotalk to £22. Plans on 30-day terms let you leave when the intro ends, so you can switch again.

### Can I keep my number?
Yes, UK mobile numbers can be moved between providers with a PAC code from your old provider. Order the new SIM first, then ask your current provider for the code.

### Do I need an unlocked phone?
Yes for Chattr, Lebara and 1pMobile, which say an unlocked phone is needed. Check before you order.

### How does the VOXI reward work?
Join through https://topreferrals.co.uk/go/voxi on a plan of £10 a month or more, without a promo code at checkout, and pay for two months within 60 days. VOXI pays a £10, £15 or £20 gift card by plan: £10 on the £10 and £12 plans, £15 on the £15 plan and £20 on the £20 and £35 plans. You choose Amazon.co.uk, Just Eat or PayPal cash.