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Selectra
Updated June 2026

Cheap UK mobile deals for budget iPhone and Samsung buyers

Budget handsets, refurbished grading, cashback-by-redemption and why SIM-only often beats Pay Monthly for most UK buyers. Two hand-curated guides covering the cheapest iPhone and the best-value refurbished Samsung in 2026.

Independent, no-upsell editorial. Refurbished grades and warranties explained. Updated for 2026.

<£8/mo

Cheapest SIM-only deal to pair with a refurbished handset

30%

Typical saving on a refurbished vs new handset in the UK

12 mo

Warranty required by UK law on refurbished phones

£0

Handset upfront cost on some Pay Monthly deals with cashback

UK mobile deals look cheaper than they are. Cashback-by-redemption is the most common trick: a retailer advertises a low monthly cost, but you must claim cashback in instalments over the contract, and missing a claim window means the saving disappears. Refurbished grading (A, B, C) matters more than most buyers realise: a Grade A unit from a reputable UK seller looks and functions like new, comes with a 12-month warranty, and typically costs 25 to 30% less than a new equivalent. For older flagships like the iPhone 7 or Samsung Galaxy S9, buying refurbished and pairing it with a cashback-specialist retailer is almost always cheaper than a network-direct contract.

For most budget buyers, SIM-only beats Pay Monthly: buy a refurbished handset outright, then pick a rolling or 30-day SIM. giffgaff and Asda Mobile regularly offer the cheapest SIM-only prices in the UK. The two guides below cover the iPhone 7 and Samsung Galaxy S9 in full detail, including where to find verified UK refurb stock, current Pay Monthly pricing and the SIM pairings that bring the total monthly cost lowest.

The two budget deals guides

Start with the handset that suits your budget

An iPhone 7 is the cheapest way into iOS in 2026. A Samsung Galaxy S9 is the best-value refurbished Android under £100. Both guides cover refurb pricing, Pay Monthly options and the cheapest SIM-only pairings available right now.

3 steps to the cheapest deal

How to find the cheapest UK mobile deal in 3 steps

Most people overpay because they start at the network website. Follow these three steps and you almost always find a cheaper combination.

1

Set your monthly cap

Decide the maximum you will spend per month on SIM and handset combined. For most budget buyers, £15 to £25/mo is achievable with a refurbished handset and a SIM-only plan. Know this number before you look at any deal.

2

Decide refurb vs new

A Grade A refurbished handset from a reputable UK seller looks new, carries a 12-month warranty and costs 25 to 30% less than its new equivalent. For older flagships (iPhone 7, Galaxy S9), there is no new stock anyway. Check our refurbished guide for trusted sellers.

3

Match a SIM-only to the handset

Once you have the handset, compare 30-day SIM-only deals. giffgaff, Asda Mobile and Smarty regularly undercut the big networks. The total cost of handset divided over 24 months plus a cheap SIM almost always beats a Pay Monthly bundle on the same network.

The 3 numbers every UK budget buyer should know

Three benchmarks before you sign anything

Three reference prices that anchor every budget mobile deal in the UK. Know them, and you can instantly tell whether any advertised deal is genuinely good value.

£200

Typical entry-level new Android (Moto G, Samsung A series)

~£70

Refurbished iPhone 7 Grade A from a reputable UK seller

£6/mo

Cheapest UK SIM-only at giffgaff (500 MB + unlimited calls)

Prices are indicative and fluctuate. Always verify current pricing before purchase. Source: Selectra research, June 2026.

Budget mobile deals FAQ

The Selectra expert answers your questions

Yes, for budget buyers who want iOS. The iPhone 7 no longer receives the latest iOS updates (iOS 15 was its final version), but it still receives security patches and runs all major apps including banking, messaging and streaming. A Grade A refurbished model from a reputable UK seller costs around £60 to £80 and comes with a 12-month warranty. Paired with a cheap SIM-only plan, the total monthly cost can fall below £10. If you need the latest camera features or iOS version support, step up to the iPhone 8 or iPhone SE (2020). Detail in our iPhone 7 deals guide.

Yes, provided you buy from a seller that offers a clear 12-month warranty and a returns policy. UK consumer law (the Consumer Rights Act 2015) requires sellers to accept returns for 30 days if the item is not as described. Reputable refurbishers (Back Market, musicMagpie, Envirofone, CEX) grade handsets as A (near-perfect), B (light wear) or C (visible wear but fully functional). Grade A units look and feel like new. Avoid marketplace listings without a warranty or returns policy. Full breakdown in our refurbished phones pros and cons guide.

For most budget buyers, SIM-only is cheaper overall. A Pay Monthly deal bundles the handset cost into the monthly payment and adds a network markup. Buying a refurbished handset outright and pairing it with a 30-day SIM-only plan gives you the same phone for less money over 24 months, plus the flexibility to switch network whenever a better deal appears. The exception is cashback-by-redemption deals from specialist retailers: these can bring the total effective cost below what you would pay buying separately, but only if you claim every cashback instalment on time.

giffgaff and Asda Mobile consistently offer the cheapest PAYG and SIM-only prices in the UK. giffgaff goodybags start from £6/mo for 500 MB data and unlimited calls and texts, with no credit check and no contract. Asda Mobile runs on the Vodafone network and has competitive rolling plans. For data-heavy users, Smarty and iD Mobile often undercut the big four. All PAYG SIMs require no credit check. Compare current prices on our mobile networks page.

Cashback by redemption is a deal structure used by aggregator retailers like Mobile Phones Direct. The headline monthly price is achieved only after you submit cashback claims at set intervals (typically months 6, 12, 18 and 24). The retailer posts a cheque or bank transfer for each approved claim. The risk is that if you miss a claim deadline, you lose that cashback tranche. When all claims are made successfully, the effective monthly cost can beat any network-direct price. Set calendar reminders as soon as you sign up. Our Mobile Phones Direct review covers the process in full.

Typically 25 to 40% off the new price for Grade A refurbished handsets. For older flagships, the saving is larger: a refurbished iPhone 7 costs around £60 to £80 versus £200 or more for the cheapest current-generation new iPhone. A refurbished Samsung Galaxy S9 is around £80 to £100 versus £350 or more for a new Galaxy S series. The 12-month warranty means the risk is comparable to buying new from a network, provided you use a reputable UK seller.

Yes, as long as the handset is unlocked. Most reputable UK refurbishers sell unlocked stock. An unlocked phone works with any UK SIM: EE, O2, Vodafone, Three, giffgaff, Asda Mobile or any other MVNO. If a handset is locked to a specific network (less common on older models), the original network is legally required to unlock it for free once the original contract has ended. Always confirm "network unlocked" before purchasing a refurbished handset.