Your Phone Weighs 200g. Making it Cost the Planet 266kg.

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This article is written in partnership with Back Market.

There’s a question I’ve been sitting with this week, and I think you should sit with it too.

Pick up your phone – go on, it’s probably already in your hand. How many raw materials do you reckon went into making it?

Have a genuine think. Not a Google. Just your gut.

Most people guess around 30. A lot of people guess 10 or fewer. And 52% of consumers, when asked, couldn’t name a single raw material in the device they’re holding right now.

The real answer is 60. Sixty distinct raw materials. In a device that weighs about 200 grams.

And here’s the number that genuinely stopped me in my tracks: manufacturing that 200g phone requires 266kg of raw materials. That’s not a typo. That’s more than 1,300 times the device’s own weight. Your phone is, in material terms, an iceberg – and we’re all just staring at the bit poking above the water.

This report was commissioned by Back Market as part of Mine My Phone – a public interest platform built around a simple question: do you know the true weight of your phone? And honestly? After reading it, I’m not sure any of us did.

The stuff we don’t know (and probably should)

Let me throw another number at you: 69% of consumers have never looked into where the materials in their devices come from. That includes me, by the way. I review tech for a living and I’ve never once stopped to ask where the cobalt in my battery originated.

Cobalt. That’s the one that hit hardest. It’s essential to pretty much every lithium-ion battery in every smartphone on the market – and 60% of respondents had never heard of it. Of the people who had heard of it, only 26% would link it to armed conflict or child labour.

Cobalt largely originates from the Democratic Republic of Congo. Children as young as six work in those mines, in hazardous conditions, to supply a chain that eventually ends with the device in your pocket. That’s not a fringe claim from an activist group – that’s the documented reality of where this stuff comes from.

Here’s the comparison that really made me uncomfortable: 48% of consumers link clothing production to child labour. Which is good – that conversation has rightly been happening for years. But only 19% make the same link for phone production. We’ve somehow decided that fast fashion is a problem worth thinking about while the device we spend six hours a day staring at gets a free pass.

Less than half of respondents – 46% – even realised that mining for smartphone materials can fund armed conflict at all. And 47% had no idea that reserves of several key metals could be depleted within 20 years at current extraction rates.

I challenge you to find another consumer product this consequential that gets this little scrutiny (you won’t).

Thinking more carefully about the devices you buy? We’ve done the hard work on some of the most popular options. Read our Google Pixel 10 review for more.

The supply chain nobody’s thinking about

Here’s one more number to put alongside the others. A smartphone supply chain involves around 200 suppliers. Most people who guessed thought it was 20 or fewer.

Two hundred. The phone in your hand is the output of a network so vast and complex that no single person fully understands all of it – and yet we engage with the end product like it’s a simple transaction. Hand over money, receive rectangle.

I’m not saying that to make anyone feel guilty. I’m saying it because I think most people, if they understood the actual weight of this thing, would make different decisions. The data backs that up.

The bit we can actually do something about

Okay. So here’s where it gets interesting – because this isn’t just a doom piece.

The average consumer keeps their smartphone for 2.5 years. That same average consumer, when asked how long phones should last, says around 5.9 years. So there’s already a gap between what people think is reasonable and what they’re actually doing.

Why do people upgrade early? Sixty-seven percent say battery life forces their hand. Fifty-seven percent are pushed out by software issues – apps that no longer support their OS, security updates that stop arriving. The phone still works. The ecosystem just stops cooperating.

And here’s the environmental maths on that: replacing a phone every 2.5 years equates to a raw material impact of 106.7kg per year. Keep the same phone for 10 years and that drops to 30.9kg. A 71% reduction. Per person. Just by keeping the thing you’ve already got.

Around two-fifths of respondents said they’d keep a device longer if they had guaranteed 10-year software updates, cheaper battery replacement options, or decade-long warranties. Which tells you the appetite is there – the infrastructure just hasn’t caught up yet.

And repair or refurbishment? It requires only about one-twentieth of the raw materials needed to manufacture a new device. One-twentieth. I’ve never been able to put a number on the difference before – I knew refurbished was “better” in a vague way, but one-twentieth is the kind of concrete figure that changes how you think about it.

If you’re weighing up whether your next upgrade is actually necessary, our iPhone 17 Pro Max vs 16 Pro Max comparison shows how much – or how little – really changes between generations.

Why Back Market is talking about this

Back Market’s whole business is built on the idea that buying refurbished should be the normal choice, not the niche one. I’ve covered them before, and what I find credible about their angle here is that Mine My Phone isn’t a sales pitch dressed up as a report. It’s an attempt to surface information that the industry has, frankly, had every incentive to keep quiet.

The platform isn’t telling you what to buy. It’s asking whether you know what you already own – and what it cost to get here.

That question – do you know the true weight of your phone? – is the right one to be asking. Not because the answer makes you feel good, but because the answer is the beginning of actually doing something useful about it.

If you want to dig into the full data, the breakdown by material, or just want to find out how your own guesses stack up against the research, the Mine My Phone platform is at backmarket.co.uk/en-gb/mine-my-phone. Worth twenty minutes of your time – and probably more thought than most of us have given this before.