Most old cell phones end up in one of four places: a drawer in your house, a refurbishment facility, a recycling plant, or a landfill. The path your phone takes matters more than you might think. A single ton of discarded phones contains 100 times more gold than a ton of gold ore, yet the vast majority of that value is never recovered. In 2022, the world produced a record 62 million metric tons of electronic waste, and only about 22% was properly collected and recycled.
Sitting in a Drawer Is the Most Common Fate
Before anything else happens, most old phones simply stay in people’s homes. Surveys consistently find that the average household has multiple unused phones tucked away in drawers, closets, or junk bins. People hang onto them as backups, forget about them, or don’t know what to do with them. This stockpiling means billions of phones worldwide are doing nothing, their valuable materials locked away indefinitely.
Refurbishment and Resale
Phones in decent condition often enter the refurbishment market. Facilities test every major function: the screen, touch response, facial recognition, cellular connectivity, and battery health. Phones that pass get sorted into cosmetic grades. A Grade A phone looks nearly new, with only faint scratches visible on close inspection. Grade B shows clear signs of use, like visible scratches and scuffs. Grade C phones have extensive wear but still work properly. Each grade is priced accordingly, and the phones are resold through carriers, online marketplaces, or third-party retailers.
Phones with minor defects land in secondary categories. A device might power on and have a clean screen but have a broken feature like a faulty speaker or damaged facial recognition sensor. These are sold at steeper discounts or stripped for parts. The refurbishment pipeline keeps millions of phones in circulation longer, which delays the need to mine new materials and reduces waste.
What Recycling Actually Looks Like
When a phone reaches the end of its usable life, formal recycling starts with disassembly. Some of this is now automated. Apple’s recycling robot, Daisy, can disassemble up to 1.2 million iPhones per year, pulling apart components to recover specific materials. Another machine called Taz uses shredder-like technology to separate magnets from audio modules, recovering rare earth elements. A robot named Dave takes apart the vibration motors to extract tungsten, steel, and rare earth magnets.
For phones recycled through more conventional facilities, the process is less surgical. Devices are shredded mechanically, then sorted using magnets, water separation, and other techniques to isolate different material streams. The valuable bits, particularly the circuit boards, then go through one of two chemical processes. In pyrometallurgical recycling, materials are smelted at high temperatures. In hydrometallurgical recycling, circuit boards are dissolved in acid baths to pull out individual metals like copper, gold, and palladium. Both methods work, but they’re complex and expensive, which is one reason recycling rates remain low.
The yields are surprisingly rich. From just one metric ton of iPhone components processed by Apple’s recycling systems, recyclers recover as much gold and copper as traditional mining would extract from 2,000 metric tons of rock. A typical smartphone contains about 17 milligrams of gold, a tiny amount per phone, but gold accounts for roughly 72% of the total metal value inside the device. Palladium makes up another 10%.
Battery Recovery Is Getting Better
Phone batteries deserve special attention because they contain cobalt, lithium, nickel, and copper, all of which are expensive to mine and increasingly in demand. The European Union has set mandatory recovery targets: by the end of 2027, recyclers must recover 90% of the cobalt, copper, and nickel from waste batteries, along with 50% of the lithium. Those targets rise to 95% and 80% respectively by 2031.
Starting in 2027, the EU will also require every battery to carry a digital passport accessible through a QR code. This passport will track the battery’s material composition, carbon footprint, recycled content, and current health status throughout its life. The goal is to make it far easier to identify what’s inside a battery and route it to the right recycling process when it’s discarded, rather than letting it end up in general waste.
What Happens in a Landfill
The phones that aren’t refurbished or recycled typically end up in landfills, either directly or after being exported to countries with less formal waste infrastructure. This is where the environmental damage happens. Circuit boards, plastic casings, and batteries all contain toxic metals, including lead, selenium, cadmium, chromium, and tin. When phones sit in landfills exposed to rain and groundwater, these metals leach into the surrounding soil and water.
Lead and selenium are particularly problematic. They persist in the environment rather than breaking down, and they accumulate through the food chain as plants absorb contaminated water and animals eat those plants. The circuit boards are the worst offenders for lead contamination, while batteries leach cobalt and copper at levels that exceed safety thresholds in standardized leaching tests. Regulations introduced in 2006 restricted the use of some of the most hazardous materials in electronics, but older phones still circulating through the waste stream contain higher concentrations of these substances.
Your Data Stays on the Phone Until You Remove It
One often-overlooked concern is personal data. A factory reset removes the surface-level access to your files, but depending on the phone and its age, data can sometimes be recovered with specialized tools. Professional recyclers follow sanitization standards that make data unrecoverable through methods like cryptographic erasure, which scrambles the encryption keys so stored data becomes meaningless, or physical destruction of the storage chip. If you’re selling, donating, or recycling your phone, a factory reset is the minimum step. Encrypting the phone before resetting it adds a meaningful layer of protection.
The Gap Between What’s Possible and What’s Happening
Small IT and telecom devices like phones, laptops, and routers generated 4.6 million metric tons of e-waste in 2022. Only 22% of that was documented as properly collected and recycled. The United Nations projects that figure will actually drop to 20% by 2030 as the volume of discarded electronics grows faster than recycling infrastructure can keep up.
The economics explain much of the gap. Recycling a phone is labor-intensive, and the 17 milligrams of gold inside a single device doesn’t justify the cost on its own. It only becomes worthwhile at scale, processing thousands or millions of devices. Manufacturer take-back programs, trade-in offers, and certified e-waste recyclers exist in most countries, but participation rates remain low. The most effective thing you can do with an old phone is keep it in use, whether by selling it, giving it away, or trading it in, so someone else gets years of life from it before it ever needs to be recycled.