A four-year-old phone with a cracked screen and a battery at 74%. The repair quote covered both. It came to slightly more than the same model, in good condition, was selling for used.
The owner paid it anyway, because the phone was hers and the alternative felt like starting over. Six months later the charging port went, and by then the model had aged out of the parts supply she’d need.
Nobody makes this decision well emotionally. It’s arithmetic with one awkward variable, and the awkward variable is usually the one people skip.
The calculation, in four numbers
Number one: what the repair costs. Not the cheapest quote — the quote from somewhere using genuine or manufacturer-authorised parts, because the cheap version has consequences covered further down.
Number two: what the phone is worth repaired. Look at completed sales for the same model and storage in good condition. Not asking prices.
Number three: what a replacement costs. A used phone one or two generations newer, which is almost always the honest comparison rather than a new device at full retail.
Number four — the one people skip: how many years of software support remain. Launch year plus the manufacturer’s commitment, minus this year. This is the variable that turns a close call into an obvious one, in both directions.
Run those four and the decision usually makes itself.
The threshold that works
A rough rule that holds up: if the repair costs more than half of what the phone is worth repaired, and it has under two years of support left, replace it.
Both halves matter. A cheap repair on a phone with four years of updates ahead is easy — do it. An expensive repair on a phone that stops receiving security patches next year is money spent on a device you’ll be replacing anyway.
The awkward middle case is an expensive repair on a well-supported phone, and that’s where the arithmetic actually earns its keep. A screen replacement on a three-year-old flagship with four years of updates left is often the better financial choice than buying something newer, even when the repair feels expensive in isolation.
Which faults are worth fixing
Not all repairs are equal, and the difference isn’t just cost.
Battery — usually worth it. The cheapest common repair, the most noticeable improvement, and on a valuable phone it frequently pays for itself at resale because buyers discount weak batteries by more than the service costs. Do it through an authorised channel; the alternative is covered below.
Screen — depends heavily on the phone’s value. On a flagship with support remaining, generally yes. On a mid-range phone approaching the end of its update window, the repair often exceeds the phone’s residual value.
Charging port — usually worth it. Often one of the cheaper repairs, and it fixes a fault that otherwise makes the phone unusable daily. Check first that it isn’t simply compacted lint, which looks identical and costs nothing to clear with a wooden toothpick.
Back glass — usually not worth it. Surprisingly expensive because of the adhesive and frame work, and buyers discount a cracked back by less than the repair costs. Live with it, disclose it, price it in.
Camera module — depends. A single failed lens on a multi-camera phone is annoying rather than disabling. Price it against how much you actually use that lens.
Water damage — usually not worth it. Corrosion is progressive and repairs are unpredictable. You can spend real money and have the next fault appear a month later. Our guide to spotting water damage explains why.
Logic board — almost never worth it. At that point you’re replacing the expensive part of the phone, and a used replacement device costs less.
Repairs, ranked
| Repair | Relative cost | Worth it when | Skip when |
|---|---|---|---|
| Battery | Low | Health under 80% on a phone with value | Phone is past its support window |
| Charging port | Low | It’s genuinely the port, not lint | Multiple other faults present |
| Buttons, vibration motor | Low | Fault is isolated | The phone is near end of life anyway |
| Single camera lens glass | Moderate | You use that lens regularly | It’s the telephoto and you rarely zoom |
| Screen | High | Flagship with years of support left | Mid-range near its update cutoff |
| Back glass | High | Almost never | Almost always — disclose instead |
| Water damage cleaning | Unpredictable | You have no alternative | Any phone with real resale value |
| Logic board | Very high | Essentially never | Always — buy a replacement device |
The pattern: cheap repairs on well-supported phones are easy decisions, and everything else deserves the four numbers.
What a repair quote should tell you
Ask three questions before agreeing to anything, because the answers change what the repair is actually worth.
Are the parts genuine or manufacturer-authorised? This determines whether the phone will flag the repair afterwards and how much resale value survives it.
What happens to calibration-dependent features? On some devices, features tied to the original component stop working after a non-authorised repair. You want to know which ones before, not after.
Is water resistance restored? Any repair that opens the device breaks the factory seal. A shop that replaces the adhesive gasket properly will say so; one that doesn’t, won’t mention it.
A quote that’s substantially cheaper than the others is usually cheaper for a reason contained in those three answers. Our comparison of genuine and copy parts works through what that difference costs later.
The parts clock nobody mentions
Here’s the variable that quietly decides this for older phones.
Manufacturers don’t supply service parts forever. Apple’s policy is the clearest published example: products are classified as vintage roughly five years after the company stopped distributing them, and obsolete at around seven, at which point authorised service generally ends. Other manufacturers operate similar windows without always publishing them as plainly.
The practical consequences arrive in stages. First, authorised repair gets slower and more expensive as parts get scarcer. Then authorised repair stops being available at all, leaving only third-party shops using salvaged or aftermarket components. Then even salvaged parts get expensive, because everyone else is chasing the same supply.
So a repair decision on a six-year-old phone isn’t really about this repair. It’s about whether you want to own a device that can’t be properly fixed next time. That’s usually the argument that settles it.
Where you get it repaired changes the answer
Three tiers, and the price difference is not the whole story.
Manufacturer or authorised service. Genuine parts, proper calibration, no warning messages, and the repair doesn’t damage resale value. Most expensive up front.
Reputable independent repair. Varies enormously. Some use genuine parts obtained through manufacturer programmes; many use aftermarket. Ask specifically which, and ask what happens to features that depend on calibration.
Cheapest available option. Aftermarket parts, no calibration, and on devices that log their own repair history, a permanent record visible to every future buyer.
That last point is the one people underestimate. On phones that flag non-genuine components in their settings, a cheap screen isn’t a saving — it’s a transfer of money from your future resale price to today’s repair bill, usually at an unfavourable rate. Our breakdown of how replaced screens affect resale value works through the numbers.
Self-repair, briefly
Manufacturers have opened up more than they used to. Apple runs a self-service repair programme supplying genuine parts and tool rental, and Google has made Pixel parts available through a parts retailer. Samsung has offered similar arrangements at various points.
Honest assessment: these are worth it if you already have the skills and the patience, and they’re a poor idea otherwise. Modern phones use structural adhesive, fragile ribbon cables, and components paired to the logic board. A screen replacement that goes wrong turns a cracked phone into a dead one, and the parts cost is not much below what a shop charges.
The exception is straightforward stuff — a charging port on some older Android models, a back cover, a SIM tray. Know which category you’re in before you order anything.
When replacement is clearly right
Six signals. Any two together and you’re probably done repairing.
- Under two years of software support remaining
- Repair cost above half the phone’s repaired value
- The model has aged past authorised parts availability
- More than one fault at the same time
- Any history of liquid exposure
- The phone has already had a major repair that didn’t hold
That fourth one deserves emphasis. Multiple simultaneous faults on an aging device usually indicate general wear rather than bad luck, and fixing one tends to be followed by the next.
When repair is clearly right
- Battery only, on a phone with years of support left
- A single fault on an otherwise sound device
- The phone is recent enough that a comparable replacement costs several times the repair
- You have manufacturer coverage that reduces the cost
- The replacement you’d buy isn’t meaningfully better
That last point is worth sitting with. Phone improvements have slowed. A three-year-old flagship with a fresh battery does nearly everything a current mid-range phone does, and the repair is often the cheaper path to the same daily experience.
Veelvoorkomende fouten om te vermijden
- Comparing repair cost against a new phone at retail. The honest comparison is a used phone a generation or two newer.
- Ignoring the support window. It converts close calls into clear answers.
- Taking the cheapest repair quote without asking about parts. Cheap parts cost more at resale than they save today.
- Repairing a phone with liquid history. Corrosion doesn’t stop because you fixed one symptom.
- Assuming a dead phone is dead. Sometimes it’s a port full of lint or a battery at the end of its life.
- Fixing back glass. Rarely returns its cost.
- Forgetting parts availability on older models. Today’s repair is fine; next year’s may be impossible.
Veelgestelde vragen
Is it worth repairing a phone that’s four years old?
If it has a couple of years of software support left and the repair is a battery or a single straightforward fault, often yes. If it’s out of support, needs a screen, or has multiple issues, replacement almost always wins.
How much should a repair cost relative to the phone’s value?
Under half of what the phone is worth repaired is a reasonable ceiling. Above that, you’re paying flagship-repair prices for a device with limited life remaining.
Does repairing a phone hurt its resale value?
An authorised repair with genuine parts barely does, and a fresh battery can help. An aftermarket screen or battery reduces value significantly, and on many devices it’s permanently visible in the settings menu.
What if the manufacturer no longer supplies parts for my model?
You’re limited to independent shops using salvaged or aftermarket components. That’s a reasonable route for a phone you plan to run into the ground and a poor one for a device you intend to sell.
Is a battery replacement always worth doing?
On a phone with real remaining value and health under 80%, yes, through an authorised service. On a cheap phone near the end of its support window, the service costs the same and returns much less.
Does insurance change the calculation?
Only if the excess is meaningfully below the repair cost, which on screen claims it often isn’t. Check the excess and any effect on future premiums before assuming a claim is the cheaper route.
Should I fix a phone before selling it?
Battery, usually yes. Screen, only through an authorised channel. Back glass, generally no — disclose it and adjust the price instead.
Write down the four numbers for your phone: repair quote, repaired value, replacement cost, years of support remaining. Most people have never seen all four together, and once they’re on the same page the decision takes about thirty seconds.
If replacement wins, see what’s listed on ExploreFrag. If you’re keeping it, our battery health guide covers whether a service is worth booking.
About the author
Emran Ahmed is the founder and CEO of ExploreFrag, a marketplace for buying and selling used phones and accessories across every brand. He has watched enough people pay to repair phones worth less than the repair to have developed a fondness for writing the four numbers down before anyone commits. He reviews listings most days and can usually tell which ones have had a cheap screen fitted before the seller mentions it.
