Cosmetic wear can create a useful discount. Functional damage can create repair cost, unreliable use and a difficult resale. The challenge is that the same mark can be harmless on one phone and evidence of impact or poor repair on another.
Practical rule: accept visible wear only when you can explain what it is, confirm that nearby functions work and see that the price reflects it.
What counts as mainly cosmetic?
Examples can include:
- fine frame scuffs away from buttons and ports;
- light rear-panel scratches;
- small finish chips that do not expose or deform the structure;
- minor marks visible only with the display off and under angled light.
Even these marks matter if the seller promised a higher grade. “Cosmetic” means the mark does not materially impair function; it does not mean the seller can omit it from the description.
Damage that deserves investigation
| Finding | Possible concern | What to test |
|---|---|---|
| Deep screen scratch or chip | Weakened glass, touch discomfort or crack propagation | Touch across the area, display uniformity and screen-replacement cost |
| Bent or twisted frame | Impact, internal pressure or poor assembly | Screen gaps, button operation, camera focus and charging connection |
| Lifted display or rear panel | Battery swelling, failed adhesive or previous repair | Stop use where swelling is suspected; contact the seller |
| Crack near port or button | Damage to a stressed structural area | Cable fit, charging stability and control response |
| Cracked camera cover | Flare, softness, contamination or future moisture entry | Every lens, focus, video and bright-light image quality |
| Discolouration or corrosion | Possible moisture or chemical exposure | Ports, speakers, microphones and seller explanation |
Do not diagnose from a photograph alone
A listing photograph can hide depth, screen defects and frame distortion. Ask for:
- the phone with the display on and off;
- all corners and edges;
- close-ups of the damaged area;
- the charging port and camera glass;
- a short video showing focus, touch or button operation where relevant.
Stock photographs cannot prove the condition of the individual phone. The written grade and return route become especially important.
Screen marks need careful classification
A mark may be on a removable screen protector, in the surface coating or in the glass itself. Do not promise yourself that it will “polish out”. Ask the seller whether a protector is fitted and whether removing it affects the return.
Test:
- touch response across the full display;
- white, black, red, green and blue backgrounds;
- low and high brightness;
- typing at screen edges;
- flicker, burn-in, dead pixels and colour patches.
Frame damage can affect more than appearance
A small finish mark is different from a dent that changes alignment. Put the phone on a flat surface and inspect the gaps around the display and rear panel. Check that buttons move evenly and a cable sits correctly in the port.
A bent frame can make a future screen or battery repair harder and may indicate an impact that affected cameras or internal connectors. Where the seller cannot explain obvious distortion, the saving should be substantial or the phone should be avoided.
Assume water resistance may be reduced
Original ingress-resistance ratings are achieved under controlled conditions and can be affected by age, impact, worn seals and repair. A used or refurbished phone should not be treated as waterproof, especially where the housing is damaged or has been opened.
Do not test a used phone by deliberately exposing it to water. Check for corrosion or moisture warnings and ask about repair history instead.
Cosmetic grade and internal condition are separate
A marked phone can have an excellent battery and original functional parts. A pristine-looking phone can have a weak battery, replacement display or charging fault. Compare:
- cosmetic condition;
- battery promise;
- parts and repair history;
- security-support period;
- warranty and returns;
- repair cost if the questionable area fails.
Use the refurbished grades guide to interpret the seller's label and the battery guide for a separate battery decision.
How damage affects price and resale
There is no universal percentage discount for a scratch or dent. Market value depends on model, age, severity, visibility, repair cost and buyer confidence.
Illustrative comparison: a £40 saving for a rear-panel scuff may be sensible if you will use a case and all functions pass. The same saving is poor compensation for a deep display scratch where a quality screen repair costs several times more.
When planning resale, assume the next buyer or trade-in service will assess the same damage. Photograph the condition when you buy so that later changes are easier to distinguish.
When to accept, negotiate or reject
| Accept | Negotiate or investigate | Reject |
|---|---|---|
| Clearly described superficial wear with all nearby functions tested | Deep marks, unexplained repair signs or damage whose cost is not reflected in the price | Swelling, lifting panels, major frame distortion, account locks or an undisclosed functional fault |
Check immediately after delivery
Photograph the phone before fitting accessories, then follow the refurbished-phone arrival checklist. If the condition is worse than the listing, report the mismatch promptly and preserve the packaging and evidence.
Sources and fact-checking
- Consumer Rights Act 2015: satisfactory quality
- Consumer Rights Act 2015: as described
- Apple: inspecting a pre-owned iPhone
Facts checked: 25 July 2026. Repair costs and device-specific construction vary; obtain a written quote where damage may affect function.
