The warranty is the part of a repair quote most people skim past – until something goes wrong. Yet the guarantee attached to a repair tells you more about a workshop than almost anything else on the page. It is a repairer putting money behind their own parts and skill, in writing, for a fixed length of time. Learn to read it properly and you can judge almost any UK repair service in about thirty seconds.
This guide explains what a phone repair warranty should cover, what it almost never covers, why the length matters, and why some repairs honestly deserve shorter cover than others. We use the tiered celltech guarantee as a worked example, but the principles apply to any repairer – manufacturer, high-street, or mail-in.
Direct answer: A good phone repair warranty covers both the replacement part and the workmanship for a clearly stated number of months, and the length itself signals how much the repairer trusts their parts and skill. The UK norm among independent repairers is 12 months. celltech goes further – a 27-month guarantee on standard repairs (screens, batteries, cameras, speakers, buttons), 9 months on connectors, 120 days on board-level and liquid-damage work, and 15 months on refurbished devices. Judge any guarantee on three things: what it covers, how long it lasts, and how clearly it is written.
What a repair warranty should actually cover
A genuine repair warranty covers two distinct things, and you want both in writing.
- The part. The replacement screen, battery, port, camera or speaker should be free from defects for the whole period. If a new screen develops dead pixels, touch dropout or a failing backlight you didn't cause, that is a part fault and the cover should apply.
- The workmanship. The labour matters as much as the component – the adhesive seal, the seating of connectors, water-resistance gaskets being reset, and calibration after the swap. A screen that lifts at the edge, a poorly bonded battery, or a port that works loose are workmanship faults the warranty should stand behind too.
A warranty that quietly covers only the part – then blames "fitting" the moment anything fails – is half a warranty. The best repairers make no distinction: if their repair fails through no fault of yours, they put it right. And a guarantee is only as trustworthy as the component behind it, so check what is going in – see our guide to OEM vs aftermarket vs genuine parts.
What a warranty will not cover (and shouldn't)
An honest warranty is specific about its limits. These exclusions are normal, fair, and shared by reputable repairers and manufacturers alike:
- Fresh accidental damage. Drop the phone and re-crack the new screen and that is new damage, not a warranty fault. Cover is for the repair holding up under normal use – not a second impact.
- New liquid ingress. Water damage after a repair is a fresh event, and liquid contact is usually excluded retrospectively too, because corrosion can surface weeks later and can't be cleanly tied to the original work.
- Unrelated faults. A battery replacement does not warrant the camera, and a screen swap does not warrant the charging port. Cover applies to the specific repair carried out.
- Third-party tampering. If the device is opened elsewhere after the repair, the seal and the warranty are broken – the repairer can no longer vouch for what happened inside.
- Normal consumption. A battery is a consumable; gradual capacity loss over years of charge cycles is expected, not a defect.
None of this is a let-out clause: a repairer who covers genuine part and workmanship failures while excluding fresh damage they could not have prevented is being straight with you. Be wary of the opposite – vague terms that seem to cover everything but, on a claim, cover nothing.
Why the length of the guarantee matters
Length is the clearest confidence signal in a repair warranty. A workshop offers long cover only if it expects the repair to last, because every claim costs it parts and labour. A short guarantee can quietly mean "we are not sure this will hold" or "we don't fully trust these parts."
Celltech's guarantee is repair-specific: covered standard repairs use the stated 27-month tier, connector work 9 months, and board-level or liquid-damage work 120 days. Eligibility, exclusions and remedies are set out in the published terms; compare any provider using its current written terms rather than a headline duration alone.
The practical upshot: a screen that fails six months after the repair is free under a 27-month guarantee but well outside a 90-day window – the difference between a guarantee you actually use and one that expires before most faults could appear.
Why some repairs carry shorter cover than others
A long headline figure is good, but a thoughtful warranty is tiered – and the tiers tell you the repairer understands their own work. Not every repair carries the same risk.
Standard component swaps (longest cover)
Screens, batteries, cameras, speakers and buttons are clean module replacements: the old part comes out, a new one goes in, and the outcome is predictable. Well-understood failure modes and new parts justify the longest guarantee – 27 months at celltech.
Connectors (shorter, separate cover)
Charging ports and headphone jacks live a harder life: plugged in thousands of times, collecting pocket lint, and taking strain from cheap or worn cables the repairer can't control. The component can be perfect while the user's environment works against it, so connectors often sit on their own shorter tier (9 months at celltech) rather than alongside screens and batteries.
Board-level, liquid and data-recovery work (shortest cover)
Micro-soldering, logic-board repair, liquid-damage treatment and data recovery carry inherent uncertainty. Liquid damage is progressive: corrosion can spread microscopically long after the device appears fixed, and no repairer can guarantee what a previously flooded board will do in a year's time. A shorter guarantee here (120 days at celltech) isn't a lack of confidence in the workmanship – it is an honest reflection of the physics. Be sceptical of anyone offering identical long cover on a flooded board and a brand-new screen.
The trouble with "lifetime" warranty claims
"Lifetime warranty" sounds like the strongest offer of all. Often it is the vaguest. The obvious question is: whose lifetime – yours, the phone's, or the shop's? In practice these claims come wrapped in conditions: original-owner only, the device never opened again, claims subject to inspection, and cover that quietly ends if the business closes. A guarantee tied to a company is only as durable as the company.
A clear figure in months is more honest and easier to act on: "27 months" tells you exactly where you stand and when cover ends, whereas "lifetime" asks you to trust an undefined promise. Treat a precise, written month-count as more valuable than an open-ended word, not less.
Your consumer rights: the legal backdrop
A warranty is something a repairer offers on top of your statutory rights – it never replaces them. In the UK, the Consumer Rights Act 2015 broadly requires that services are carried out with reasonable care and skill, and that goods supplied as part of that service (such as a replacement screen or battery) are of satisfactory quality, fit for purpose and as described. If a repair fails because the work or the part fell short, you may have a claim regardless of what the repairer's own warranty says.
So a repairer cannot use a short warranty to sign away your statutory rights – terms that try to are generally unenforceable – and a generous voluntary guarantee simply makes claims easier. This is general information rather than legal advice; for a specific dispute, check current guidance from a body such as Citizens Advice.
celltech's tiered guarantee: a worked example
Here is how those principles translate into one real policy. celltech publishes its guarantee in plain figures rather than hiding behind a quote-wall – the same transparency we apply to our pricing.
| Repair type | celltech guarantee | Why this length |
|---|---|---|
| Screens, batteries, cameras, speakers, buttons | 27 months | Clean module swaps with predictable, well-understood outcomes |
| Connectors (charging port, headphone jack) | 9 months | High mechanical wear and exposure to user cables and debris |
| Board-level, micro-soldering, liquid damage, data recovery | 120 days | Inherent uncertainty – especially progressive liquid corrosion |
| Refurbished devices | 15 months | Whole-device cover on a fully reconditioned, tested unit |
The 27-month standard tier is the headline, and it is set out in the published Celltech terms. To make it concrete: a screen replacement on an iPhone 14 is £99.95 at celltech, and it carries the full 27-month guarantee on both the part and the workmanship. A battery replacement on an iPhone 15 is £74.95, covered for the same 27 months. There is no separate "warranty upgrade" to buy – the cover is part of the repair.
Book online, arrange suitable tracked inbound postage using the order instructions, and review the return-delivery terms confirmed for the order.
How to check a warranty before you book a repair
Before you hand over any device – to celltech or anyone else – run the warranty through this quick checklist:
- Is it written down? A guarantee you can read beats one you are told about. If it isn't on the site or the receipt, ask for it in writing.
- Does it cover part and workmanship? Watch for cover that excludes "fitting" or labour – that is the gap most claims fall through.
- Is the length a clear number? Prefer a stated month-count over a vague "lifetime" promise with hidden conditions.
- Are the tiers explained? Different cover for board and liquid work is a sign of an honest, experienced repairer – not a worse one.
- How do you claim? Check that claims are simple, who pays return postage, and whether your statutory rights are acknowledged rather than waived.
- Will it outlast the business? An established, well-reviewed specialist is likelier to honour cover than a pop-up stall promising "lifetime" anything.
The warranty is one of the strongest signals of repair quality you have, but it works best alongside the other checks – reviews, parts transparency, and clear pricing. For the full set, see our guide on how to choose a phone repair shop.
Frequently Asked Questions
How long should a phone repair warranty last?
Twelve months is the typical floor among reputable independent UK repairers, and anything shorter deserves a second look. Longer cover is a stronger signal: celltech's standard repairs carry a 27-month guarantee – more than double the usual 12 months. Board-level and liquid work reasonably carries shorter cover because of its inherent uncertainty.
Does a repair warranty cover accidental damage?
Almost never, and that is normal. A warranty covers the repair holding up under ordinary use – a part defect or a workmanship failure. Drop the phone again, or get it wet, and that is fresh accidental damage and a new repair – the domain of insurance, not a guarantee.
Is a "lifetime" warranty better than a clear 12 or 27-month one?
Not necessarily. "Lifetime" is often vaguer than it sounds – usually original-owner only, conditional on inspection, and worthless if the business closes. A precise figure in months is unambiguous and easier to enforce, so treat a clear, long month-count as the stronger promise.
Does repairing my phone elsewhere void the manufacturer's warranty?
Under UK consumer law, a third-party repair does not automatically void a manufacturer's warranty; they can decline cover only where they can show the independent repair caused the specific fault claimed. That said, if your device is still within the manufacturer's warranty for a fault they would cover, using their service for that repair is usually most sensible.
What is the difference between a warranty and my consumer rights?
A warranty is a voluntary promise the repairer chooses to give; your consumer rights are the legal baseline that applies regardless. In the UK, the Consumer Rights Act 2015 broadly requires services to be performed with reasonable care and skill and any parts supplied to be of satisfactory quality. A warranty sits on top of those rights to make claims easier – it cannot sign them away. This is general information, not legal advice.
How do I make a warranty claim with a mail-in repairer?
With celltech you get in touch and describe the suspected covered fault before posting. We confirm the warranty-return instructions, assess the device and apply the written guarantee where the claim is covered. Delivery method and any charges follow the warranty and order terms.
Does the warranty still apply if I have the phone opened by someone else later?
Usually not. Once a device is opened or worked on by a third party after the repair, the original repairer can no longer vouch for what is inside, so the seal – and the warranty on that work – is generally broken. If a covered fault appears, take it back to the original repairer first rather than opening the device yourself or having another shop intervene.