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TopReferrals

SIM-only discount codes and referral rewards UK 2026

The cheapest route into unlimited data on TopReferrals runs through Chattr: discount code HONEST75 takes 75% off the first month, so Freedom One's unlimited 5G data, calls and texts cost £3.75, then £15 a month falling to £13, on O2 or Vodafone with no contract. SIM-only networks also pay for new customers with gift cards, and the size of the card tracks the plan the new customer picks — so the reward and the monthly bill have to be read together. The referral programme we cover is VOXI, Vodafone's SIM-only brand on the combined Vodafone and Three network, whose Friends with Benefits scheme pays each side £10, £15 or £20 by plan tier, doubled to £20, £30 or £40 for referrals made from 7 July, a window that shut on 7 October 2026. Every VOXI plan is a rolling 30-day subscription with unlimited social media data. The reward is paid once both sides have paid two months, as an Amazon.co.uk or Just Eat gift card or PayPal cash. We publish the tier for every plan, not just the headline maximum.

Checked 7 November 2026 by Bez, Editor-in-Chief: every reward below, against the brand's own terms.

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What to look for here

  • A licensed UK network or an operator running on one, with plans sold direct
  • Rolling monthly plans, so the reward never ties you into a long contract
  • Reward tiers published per plan in the operator's own terms
  • A defined claim route with a stated claim window
  • Conditions that an ordinary customer meets simply by staying for the qualifying months

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Mobile questions

What is the cheapest unlimited data SIM on TopReferrals?

Chattr's Freedom One: £3.75 for the first month with discount code HONEST75 at the Chattr link, then £15 a month, falling to £13 from month 12. No contract and no credit check.

Which UK SIM-only network pays the biggest referral reward in 2026?

VOXI's referral pays up to £20 each — on the £20 (100GB) plan or the £35 Unlimited plan — after both sides have paid two months. Its Double Rewards window (up to £40) closed on 7 October 2026.

Why does the reward depend on the plan?

Because the network is paying for a customer, and a customer on a bigger plan is worth more to it. VOXI ties each tier to the new joiner's plan and, if the plan changes before the second payment, pays on the lower of the two — so join on the plan you mean to keep.

Can I combine a network's referral with a student or promo code?

Usually not. VOXI's terms say a promo code at checkout, including its student one-month-free code, invalidates the referral. Choose one route at sign-up: the referral link for the gift card, or the student route for the free month and boosted data.

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