SMARTY

Because SMARTY is wholly owned by Three, it is technically not a third-party MVNO in the same sense as Lebara, giffgaff, or 1pMobile. Industry reports class it as a "host-owned sub-brand" — a structure the host operator uses to defend the budget tier without diluting the flagship Three brand. That ownership matters in practice: SMARTY customers connect to the same masts, the same 4G core, and the same 5G rollout that Three retail customers use. Ofcom's mobile coverage data treats SMARTY traffic as Three traffic.

The product itself is deliberately stripped down. There are three plan families: capped data plans from 15 GB up to 200 GB, unlimited data plans, and a small group SIM bundle that discounts a second line on the same account. Every plan is a 1-month rolling contract with no minimum term, no credit check, and no annual mid-contract price rise written into the terms. Tethering and 5G are included on every tier. There is no traditional voicemail by default — calls divert to a missed-call SMS instead.

SMARTY also sells PAYG-style add-ons (extra data, international call bundles, "talk & text" packs) and supports both physical SIM and eSIM activation. The brand's positioning has stayed consistent since launch: cheap, simple, and honest pricing — explicitly aimed at customers who feel burned by the annual RPI/CPI hikes that EE, O2, Vodafone, and Three's main brand all apply mid-contract.

The "no annual price rise" line is one of SMARTY's headline marketing claims and it is structurally honest: because there is no minimum term, the operator does not need a mid-contract escalation clause. The Ofcom rules introduced in January 2025 require operators to express any in-contract price rise in pounds and pence at the point of sale, which made the percentage-based CPI+3.9% clauses common across the rest of the UK market harder to defend. SMARTY's response was to drop the clause altogether and to publish that decision as a feature.

The second pillar of the pricing pitch is the discount-data refund. SMARTY customers on capped plans who use less than their full data allowance receive a pro-rata refund credited back at the end of the bill cycle. The refund is calculated against the cash value of the plan, not a notional GB rate, and is paid as account credit or, on request, back to the original payment method. It is one of the few UK MVNO loyalty mechanics that returns money rather than rolled-over data.

Independent monitoring by Uswitch and MoneySavingExpert has tracked SMARTY pricing across multiple April price-rise cycles and confirmed the in-flight rate is held. New-customer rates do move, however — promotional 3-month half-price offers are common, after which the price reverts to the standard published tier.