What Happens to Old Smartphones After You Throw Them Away?
You buy a new phone.
The old one goes into a drawer.
A year later, you finally decide to get rid of it.
Maybe you trade it in.
Maybe you give it away.
Maybe you take it to a recycling center.
Or perhaps you make the worst possible choice:
throw it into the household trash.
What happens next?
The journey of old smartphones is much more complicated than most people realize.
Some phones are cleaned, repaired and sold to another owner.
Some are dismantled so useful parts can be reused.
Others are shredded and processed so recyclers can recover materials such as copper, gold, steel and battery metals.
Some devices sit forgotten in drawers for years.
Others enter poorly regulated recycling networks where workers may dismantle electronics without proper protection.
And some old smartphones simply end up in ordinary waste streams even though their lithium-ion batteries can create serious fire hazards.
The scale of the problem is enormous.
The latest Global E-waste Monitor reports that the world generated around 62 million tonnes of electronic waste in 2022, yet only about 22.3% was formally documented as collected and recycled. Small IT and telecommunications equipment—including mobile phones, laptops and routers—accounted for about 4.6 million tonnes, with roughly 22% documented as formally collected and recycled.
So where do all those old smartphones actually go?
The answer begins before they become waste at all.
Old Smartphones at a Glance
| What Happens | Possible Destination |
|---|---|
| Phone still works | Resold or donated |
| Minor damage | Refurbished and resold |
| Valuable components work | Harvested for spare parts |
| Battery reaches end of life | Sent to specialist battery recycling |
| Device cannot be reused | Dismantled and shredded |
| Metals are recoverable | Copper, gold and other materials separated |
| Device enters informal recycling | May be dismantled under unsafe conditions |
| Phone goes into household trash | Can end up in landfill or waste-processing systems |
| Lithium battery is crushed | Can cause fire or explosion |
| Device is stored at home | Never reaches recycling at all |
The environmentally preferable route is usually:
reuse first, recycle later.
If a working device can continue serving another person, that normally avoids some of the environmental cost of manufacturing a replacement device.
1. Many Old Smartphones Never Leave Your House
Before discussing recycling plants, there is another destination worth mentioning.
The drawer.
People often keep old smartphones because they contain:
photos;
messages;
contacts;
banking apps;
authentication accounts;
old SIM cards;
private files.
Some people plan to use them as backups.
Others simply forget about them.
From an environmental perspective, this creates a strange situation.
A phone may contain valuable recoverable materials, but none of those resources can re-enter the economy while the phone remains unused in a drawer.
The device is not technically landfill waste.
But it is also not being reused.
And it is not being recycled.
This is sometimes called hibernating electronics—devices that are no longer useful to the owner but remain stored rather than entering a reuse or recycling stream.
2. The Best Old Smartphones May Be Resold
If the phone still works, recycling is often not the first destination.
It may be sold.
Trade-in businesses and refurbishers evaluate factors such as:
model;
age;
battery health;
display condition;
storage capacity;
camera condition;
network compatibility;
activation status.
A relatively recent phone in good condition still has substantial economic value.
Instead of destroying it for materials, a company may clean it, test it and sell it to another customer.
Manufacturers themselves increasingly participate in this process.
Apple’s Trade In program says returned devices are assessed for either reuse or recycling, depending on their condition.
Apple Trade In and recycling program
Google likewise promotes trade-in, refurbishment and recycling options for older devices.
Google device recycling and trade-in information
This means some old smartphones never become waste at all.
They simply get another owner.
3. Refurbishment Can Give a Phone Several More Years of Life
A phone does not have to be perfect to remain useful.
Suppose the device has:
a weak battery;
cracked back glass;
damaged charging port;
worn speaker.
The processor may still work perfectly.
The cameras may still be good.
The storage may still be healthy.
A refurbishment company can replace damaged parts, test the phone and resell it.
That can extend the device’s useful life significantly.
This is one reason repairability matters.
The European Union has introduced new rules aimed at making smartphones and tablets more durable and repairable. Since June 2025, covered devices placed on the EU market face requirements involving battery durability, spare-part availability, repair access and software support.
European Commission smartphone and tablet ecodesign rules
The EU rules include requirements for critical spare parts to remain available for years after models leave the market.
That could help more old smartphones remain usable instead of becoming waste as soon as one component fails.
The News Ink explored the same idea in a different product category in Could a Circular Laptop Really Last for 20 Years?.
The principle is identical:
replace the failed component instead of replacing the entire machine.
4. Right-to-Repair Rules Could Change What Happens to Old Phones
For decades, many electronics followed an increasingly disposable model.
Battery weak?
Replace the phone.
Charging port damaged?
Replace the phone.
Software support ends?
Replace the phone.
That is beginning to change.
EU right-to-repair rules that became applicable in 2026 are designed to make repair easier and more attractive for products including mobile phones and tablets.
European Commission right-to-repair rules
The logic is straightforward.
Every extra year a smartphone remains useful delays the moment when it becomes electronic waste.
Longer device life can also reduce demand for new:
metals;
plastics;
glass;
batteries;
manufacturing energy.
So one of the most effective ways to manage old smartphones may be preventing them from becoming old quite so quickly.
5. Phones That Cannot Be Resold Can Become Spare Parts
Suppose the motherboard has failed.
The entire phone may no longer work.
But other parts may still be useful.
A recycler or refurbisher could potentially recover:
display assemblies;
cameras;
speakers;
vibration motors;
buttons;
housing components;
charging assemblies;
other functional modules.
These parts can be tested and reused for repairs.
This process is sometimes called parts harvesting.
It occupies an important position between reuse and full material recycling.
Instead of crushing a functioning camera module into raw material, it may be more valuable to install the complete module into another phone.
The Basel Convention’s guidance for used and end-of-life mobile phones specifically recognizes refurbishment, repair, material recovery and recycling as different stages in responsible phone management.
Basel Convention guidance for used and end-of-life mobile phones
6. Your Personal Data Must Be Removed Before Reuse or Recycling
There is another resource inside old smartphones that recyclers do not want:
your data.
A phone can contain:
photos;
videos;
email;
saved passwords;
banking information;
messages;
authentication apps;
location history;
documents;
browser sessions.
Before selling, donating or recycling a device, the user should properly prepare it.
That generally means:
backing up important information;
signing out of important accounts;
removing activation locks;
removing or transferring SIM/eSIM information where appropriate;
performing the manufacturer’s proper factory-reset procedure.
The U.S. EPA explicitly recommends deleting personal information before electronics are donated or recycled.
Apple likewise tells users to back up and remove personal information before sending devices for recycling.
The News Ink’s article What Actually Happens to Your Deleted Photos? explains why deleting individual files is not always the same as properly preparing an entire device for transfer.
A full device handoff deserves more care than simply deleting the gallery.
7. The Battery Is One of the Most Important Parts to Handle Safely
Modern old smartphones generally contain rechargeable lithium-ion batteries.
Those batteries are extremely useful during normal operation.
At end of life, they require special handling.
The U.S. Environmental Protection Agency warns that lithium-ion batteries and devices containing them should not be placed in ordinary household trash or municipal recycling bins.
Why?
Because batteries can be:
crushed;
punctured;
bent;
short-circuited
during waste handling.
That can trigger fires.
EPA identified more than 240 reported fires caused by lithium-ion batteries at 64 waste-management facilities during a 2013–2020 review period. Small consumer electronics including phones and tablets were among the devices involved.
EPA guidance on used lithium-ion batteries
This is why throwing a phone into ordinary recycling can actually make recycling more dangerous.
8. Battery Recycling Starts With Collection and Sorting
Specialist recyclers treat batteries differently from ordinary household waste.
EPA describes a typical lithium-ion recycling chain beginning with collection and sorting.
Devices may pass through several collection facilities before reaching a recycler equipped to process the battery safely.
EPA overview of lithium-ion battery recycling
Once separated, batteries can be processed to recover materials that may eventually return to battery supply chains.
Lithium-ion batteries can contain valuable materials such as:
lithium;
cobalt;
nickel;
copper;
aluminum;
graphite,
depending on the battery chemistry.
Recovering these materials reduces the amount that must ultimately be obtained from new mining.
The News Ink’s explanation of why phone batteries drain faster in cold weather explores the lithium-ion chemistry that makes these batteries so powerful—and also explains why they require careful temperature and safety management.
9. Phones That Cannot Be Reused Are Dismantled
Eventually, some old smartphones simply have no viable second life.
Maybe the board is destroyed.
The screen is broken.
The device is too obsolete.
The battery is unusable.
At this stage, the phone can enter material recycling.
Professional facilities may separate:
battery;
circuit boards;
metal frames;
cables;
plastic housings;
screens;
other components.
Google even publishes recycler guides for Pixel models explaining how trained electronics recyclers can disassemble devices to access raw materials.
The goal is no longer to make the smartphone work.
The goal is to separate material streams efficiently enough that valuable resources can be recovered.
10. Some Phones Are Shredded Into Material Fractions
Once dangerous batteries and other components are managed appropriately, electronic hardware can undergo mechanical processing.
Depending on the recycling system, this can involve:
dismantling;
crushing;
shredding;
screening;
magnetic separation;
density separation;
other sorting processes.
The result is not a pile of intact phones.
It becomes several material fractions.
Steel can be separated magnetically.
Copper-rich material can enter metal recovery systems.
Circuit-board fractions may be sent to specialist refiners.
Some plastics may be separated where technically and economically practical.
This is how old smartphones gradually stop being electronic devices and become industrial raw material.
11. There Is Gold Inside Old Smartphones
A smartphone uses tiny quantities of valuable metals because electronics require materials with excellent electrical properties.
Gold is particularly useful because it conducts electricity well and resists corrosion.
Copper is used extensively in electrical connections.
Other parts contain additional metals.
One phone contains only small amounts.
Millions of phones create a very different equation.
The Global E-waste Monitor emphasizes that electronic waste represents a substantial pool of recoverable materials rather than simply garbage.
This is sometimes described as urban mining.
Instead of digging new rock from the ground, recyclers recover material from products society has already manufactured.
Apple has invested heavily in this area.
Its recycling systems include automated disassembly technologies designed to separate components before downstream material recovery.
The company says devices returned through its recycling system are assessed for reuse or environmentally responsible recycling.
12. Why Not Just Melt the Entire Phone?
Because a smartphone is not one material.
It is a complicated sandwich.
It can contain:
glass;
aluminum or steel;
copper;
gold;
plastics;
ceramics;
adhesives;
battery chemicals;
rare-earth-containing components;
many electronic materials.
These materials have very different melting points, chemical properties and economic values.
Throwing everything into one uncontrolled furnace would:
lose useful material;
create contamination;
potentially release harmful pollutants.
Professional recycling therefore uses multiple stages.
The aim is to increase the purity of separated material streams before final recovery.
That is one reason environmentally responsible e-waste recycling is much more complicated than ordinary household recycling.
13. Formal Recycling Is Not Where Every Phone Ends Up
This is the darker side of the story.
Globally, formal recycling captures only a fraction of electronic waste.
WHO says 62 million tonnes of e-waste were generated in 2022, while only 22.3% was documented as appropriately collected and recycled.
WHO — Electronic waste and health
That leaves an enormous quantity outside formally documented recycling systems.
Some is stored.
Some is reused.
Some is mixed into ordinary waste.
Some may be traded across borders.
And some is processed by informal recycling networks.
This is where old smartphones can create serious human-health and environmental problems.
14. Informal E-Waste Recycling Can Be Dangerous
Imagine trying to recover copper from electronics without industrial equipment.
One crude approach is burning away surrounding material.
Another is manually smashing devices apart.
Some informal recycling operations use heating or aggressive chemicals to recover metals.
WHO warns that unsafe e-waste processing can release harmful substances including:
lead;
cadmium;
mercury;
dioxins;
nickel;
other toxic compounds.
These contaminants can enter:
air;
dust;
soil;
water;
food.
WHO particularly emphasizes risks to children living or working near informal e-waste processing sites.
The problem is therefore not recycling itself.
It is unsafe recycling.
15. Children Can Be Especially Vulnerable Around E-Waste
This is one of the most troubling consequences of unmanaged electronic waste.
WHO reports that children can face disproportionate risks because:
their bodies are still developing;
they absorb more contaminants relative to body size;
their nervous systems are more vulnerable;
young children frequently put hands and objects into their mouths.
Exposure associated with unsafe e-waste recycling has been linked with risks involving neurological development, respiratory health and other outcomes.
That is why responsible management of old smartphones is not simply an environmental lifestyle issue.
It can also be a public-health issue.
16. Some E-Waste Crosses National Borders
Electronic waste is valuable because it contains reusable devices, parts and recoverable materials.
That value creates international trade.
A used phone shipped overseas might genuinely be:
tested;
refurbished;
resold.
That can extend its useful life.
But shipments described as reusable electronics can also contain equipment that is effectively waste.
International rules such as the Basel Convention exist partly to control movement and environmentally sound management of hazardous and other wastes, including e-waste.
The distinction between:
used electronics for legitimate reuse
and
waste exported for cheap disposal
is therefore extremely important.
17. Throwing a Smartphone in the Trash Is One of the Worst Options
Suppose none of the reuse or recycling stages happen.
The phone goes into ordinary household waste.
Now several valuable resources are effectively lost.
The battery can become a fire hazard.
The device may be:
compacted;
crushed;
landfilled;
incinerated,
depending on the local waste system.
EPA specifically tells consumers not to place lithium-ion batteries or battery-containing electronics into ordinary household garbage or municipal recycling.
The better route is a dedicated electronics collection system.
18. Certified Electronics Recyclers Can Reduce the Risk
Not every recycling operator follows the same standards.
In the United States, EPA encourages the use of certified electronics recyclers.
It identifies two major accredited certification frameworks:
R2
and
e-Stewards.
EPA says certified recyclers are audited against standards addressing issues such as:
environmental management;
worker safety;
downstream handling;
data destruction;
reuse and recycling practices.
EPA — Certified Electronics Recyclers
That is particularly important for businesses disposing of hundreds or thousands of old smartphones containing corporate data.
The cheapest disposal company is not automatically the safest one.
19. Data Security Does Not End When You Stop Using the Phone
People often treat a retired phone as harmless.
It is not.
Until properly erased, old smartphones can contain years of personal information.
Consider:
saved email;
password reset access;
authentication apps;
documents;
private photos;
browser sessions;
contact lists.
That information can be more valuable than the physical phone.
The News Ink’s Cybersecurity Explained guide covers why stored credentials and authenticated devices can become valuable targets.
And Online Privacy: Why We Have More Privacy Tools but Less Privacy explains why personal data can persist across more devices and services than people realize.
Before selling or recycling a phone, treat data erasure as part of the disposal process.
20. Repair Could Prevent Millions of Devices From Becoming Waste
The most efficient recycler in the world still has to consume energy and industrial resources.
If the phone can remain useful, reuse is often preferable.
That is why policymakers increasingly focus on:
replaceable batteries;
spare parts;
longer software support;
repair information;
durability.
EU smartphone rules applying since 2025 require covered devices to meet durability and repairability standards, while battery rules require substantial capacity retention after repeated charging cycles.
The goal is straightforward.
Keep electronics working longer.
Generate less waste.
Recover materials only when the product has genuinely reached the end of its useful life.
What Should You Do With Your Old Smartphone?
If you have an unused phone today, use this order.
1. Reuse It
If it still works, consider keeping it as:
a backup phone;
music player;
camera;
navigation device;
home security display.
2. Give It to Someone
A working phone can still have significant value.
3. Sell or Trade It In
Newer phones can have strong secondhand value.
4. Repair It
A battery or screen replacement may give the device several additional years.
5. Recycle It Properly
If it truly cannot be reused, use:
manufacturer take-back programs;
authorized electronics collection points;
reputable certified e-waste recyclers.
6. Never Throw It Into Ordinary Trash
The lithium-ion battery makes this especially important.
Before Recycling Old Smartphones
Do not hand over the phone immediately.
First:
back up anything important;
transfer authentication apps;
sign out of major accounts;
remove SIM cards where applicable;
deal with eSIMs appropriately;
disable manufacturer activation locks;
perform a proper factory reset;
remove memory cards;
verify that your personal data is gone.
If the battery is:
swollen;
punctured;
damaged;
overheating,
do not keep charging or aggressively handling the device.
Ask the manufacturer or an appropriate hazardous-waste/electronics facility how to manage it safely.
Frequently Asked Questions
What happens to old smartphones when they are recycled?
Old smartphones may first be tested for reuse. Devices that cannot be reused can be dismantled so batteries, circuit boards, metals, plastics and other components enter specialized recycling processes.
Are old smartphones valuable?
Yes. Even broken phones can contain reusable parts and recoverable materials such as copper and small amounts of precious metals.
Is there gold inside smartphones?
Yes. Gold is used in small quantities in electronic components and connections because of its conductivity and resistance to corrosion.
What happens to smartphone batteries?
Lithium-ion batteries should enter specialist recycling systems where they can be processed for useful battery materials. They should not be placed in normal household trash or curbside recycling.
Can I throw an old phone into normal recycling?
Generally, no. Phones containing lithium-ion batteries require dedicated electronics or battery collection routes.
Can old smartphones cause fires?
Yes. Damaged or crushed lithium-ion batteries can ignite. EPA has documented battery-related fires throughout municipal waste-management systems.
What happens to phones that still work?
They may be traded in, refurbished, donated or resold to another customer instead of being dismantled.
Should I factory-reset my phone before recycling it?
Yes. Back up anything important, remove account locks and follow the manufacturer’s recommended procedure for erasing personal information before transferring the device.
Are all old smartphones formally recycled?
No. Global e-waste statistics show that only a minority of total e-waste is formally documented as collected and recycled.
Why is informal phone recycling dangerous?
Unsafe processing can involve open burning, uncontrolled dismantling or chemical extraction, potentially releasing toxic substances into air, soil, dust and water.
Is repairing a phone better than recycling it?
If the phone can realistically continue working, extending its useful life can delay waste generation and reduce the need to manufacture a replacement. Recycling becomes important once reuse or repair is no longer practical.
Why do manufacturers want old phones back?
Trade-in and take-back programs can recover devices for resale, refurbishment, parts harvesting or material recycling.
Old Smartphones Do Not Disappear—They Become Someone Else’s Problem or Someone Else’s Resource
Pressing a new-phone order button is easy.
What happens afterward is much less visible.
The old device sits on a desk.
Then in a drawer.
Eventually it leaves your home.
From there, old smartphones can follow very different paths.
The best devices may remain phones.
They are cleaned.
Tested.
Repaired.
Resold.
Someone else gets several additional years from technology that the original owner no longer wanted.
Other phones become collections of useful parts.
A working camera.
A display.
A speaker.
A housing.
A charging assembly.
These components can extend the life of other devices.
Eventually, true end-of-life old smartphones become raw material.
Batteries are separated.
Circuit boards are processed.
Metals are recovered.
Useful resources begin another journey through the manufacturing system.
That is the circular-economy ideal.
But the global reality is much messier.
Millions of tonnes of electronic waste never reach well-managed formal recycling systems.
Some devices end up mixed with ordinary waste.
Lithium batteries can start fires.
Informal workers can be exposed to hazardous chemicals while dismantling electronics or burning material to recover valuable metals.
Communities can inherit contaminated air, soil and water.
And valuable materials that required mining, refining, transportation and manufacturing can be lost instead of recovered.
That is why what you do with old smartphones matters.
Do not think of an unwanted phone as ordinary trash.
It contains:
a lithium-ion battery;
valuable metals;
complex electronics;
potentially sensitive personal information.
Reuse it if possible.
Repair it if practical.
Sell or donate it if someone else can use it.
And when its useful life is genuinely finished, send it through an appropriate electronics recycling system.
A smartphone may fit comfortably in one hand.
Its environmental story is much larger.
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