To destroy a SIM card, cut through the gold chip with scissors, then cut the card into a few more pieces. That's enough to make it unreadable. But first, save any contacts stored on it and ask your carrier to cancel or move the number. Once the line is deactivated, the SIM is useless anyway, even if it's still in one piece. This guide explains when it makes sense to destroy an old SIM card, what to do before you cut it, how to do it safely, and how to recycle it. Got an eSIM instead? You delete it in your phone's settings, there's nothing to cut.
When should you destroy an old SIM card?
Your phone number belongs to your account with your carrier, not to the plastic card. The SIM is the key that connects your phone to that account. It can also hold a few contacts and text messages. You don't have to destroy a SIM card, but it's a good idea when:
- You sell, give away or recycle a phone. Take the SIM out before the phone leaves your hands.
- You moved your number to a new carrier or a new SIM. After a number transfer or a SIM replacement, the old card no longer works for that line.
- You switched to eSIM. When you convert a physical SIM to an eSIM, the physical SIM is deactivated. More on this in how to switch from a SIM card to eSIM.
- You have old travel or prepaid SIMs in a drawer. If you won't use them again, there's no reason to keep them.
Not sure what's on your old card? See what information is stored on a SIM card.
What to do before you destroy a SIM card
Destroying the card is the last step. Do these first, so you don't lose anything you need.
1. Save the contacts and texts stored on the SIM
Most phones today save contacts to your phone or your cloud account, not to the SIM. Older phones sometimes saved them on the SIM card. To empty the SIM into your phone before you throw it away:
- iPhone: put the old SIM in, then go to Settings > Apps > Contacts > Import SIM Contacts. Your iPhone doesn't save contacts to the SIM itself (Apple: Import contacts from your SIM card to your iPhone).
- Android: open the Contacts app and look for Import or Manage SIM in the menu or under Fix & manage. Menu names vary by brand and Android version.
2. Move your accounts off the number, if you're giving it up
Many banks, email accounts and apps send login codes by text message. If you're giving up the number for good, change it in those accounts first. If you're keeping the number on a new SIM or eSIM, the codes keep coming to you.
3. Cancel or move the number with your carrier
This is the step that really protects you. Ask your carrier to cancel the line, or transfer your number to your new carrier or SIM. Once the line is deactivated, the old card can't make calls, send texts or receive your codes anymore. That's also the answer if you want to make a SIM unusable without breaking it: have your carrier block or deactivate it.
Just switched to a new SIM or an eSIM? Keep the old card for a short while, until you're sure the new one works. AT&T, for example, says to keep the physical SIM for at least 14 days after you convert it to eSIM before you discard it (AT&T: Convert a physical SIM to an eSIM).
4. Take the SIM card out of your phone
Turn off your phone. Find the small hole next to the SIM tray, push the SIM eject tool or a straightened paper clip into it, towards the phone, without forcing it. The tray pops out (Apple: Remove or switch the SIM card in your iPhone). On some older Android phones, the SIM sits under the back cover. If your SIM is dirty and you want to keep using it, see how to clean a SIM card instead.
No SIM tray at all? iPhone 14 and later models bought in the US, and iPhone Air, only use eSIM (Apple: iPhone Air specs). Then there's no card to destroy, see the eSIM section below.
How to destroy a SIM card safely
The data sits in the small chip under the gold contact area. The gold contacts are only how your phone talks to the chip. So the goal is simple: break the chip.
Cut it with scissors
- Pop the SIM out of its plastic frame if it's still in one.
- Cut straight through the middle of the gold area with ordinary household scissors.
- Cut the card again, crosswise, so the chip area ends up in several small pieces.
- Throw the pieces away in different bins, or bring them to an electronics recycling point (see below).
Cut on a table, away from your eyes, as small bits can fly off. Keep the pieces away from children and pets.
No scissors? Break it
You can also bend the SIM back and forth across the chip until it snaps, or crush the chip area with a hammer on a hard surface, covered with a cloth. Check afterwards that the chip itself is cracked or split, not just the plastic around it.
Don't forget the SIM packaging
The plastic card the SIM came in often shows the PIN, the PUK code and the SIM number. Cut that part up or tear it to pieces too.
Methods to avoid
- Burning it: burning plastic and electronics releases toxic fumes and can cause burns or a fire. Scissors do the job better.
- Chemicals or salt water: they're messy, they may not reach the sealed chip, and you can't tell if they worked.
- Burying it or throwing it in nature: the card stays readable for a long time and it's electronic waste.
How to recycle old SIM cards
A SIM card is a small piece of electronics, so it's better not to just drop it in the trash. You have a few options:
- Ask your carrier or phone shop. Some carriers take old SIMs back with old phones. giffgaff in the UK, for example, lists SIM cards among the products it takes back for recycling (giffgaff: How to recycle old phones and SIMs).
- Use an electronics collection point. Drop the cut pieces in a box for small electronics, often found in supermarkets, electronics stores or your local recycling center.
- Recycle the phone with it. Selling or recycling your phone? Take the SIM out first, destroy it, and recycle the pieces along with other small electronics.
Cut the SIM before you recycle it. Then nobody can use it, even if the pieces get sorted by hand.
Got an eSIM? Delete it instead
An eSIM is built into your phone, so there's nothing to cut. You remove the eSIM profile in your phone's settings instead. Do it when you sell your phone, or when you no longer need a travel plan.
- iPhone: see how to delete an eSIM on iPhone.
- Android: see how to delete or remove an eSIM on Android.
Selling or trading in an iPhone? Apple says to choose the option that erases the device and the eSIM profile (Apple: What to do before you sell, give away or trade in your iPhone). If you want to keep your number, move it to your new phone before you delete anything. Deleting an eSIM doesn't cancel your plan, so ask your carrier to cancel the line if you're giving it up.
Thinking about leaving physical SIMs behind? Your carrier may be able to convert your physical SIM to an eSIM. If you travel, a travel eSIM gives you data abroad with nothing to keep or throw away afterwards. You install it with a QR code and delete it when your trip is over. Find the eSIM for your destination.
FAQs
What happens if I break my SIM card?
Your phone can't read it anymore, so you lose service on that line. Your number isn't lost, though. It's linked to your account, so your carrier can give you a new SIM or an eSIM with the same number. Only contacts or texts saved on the broken card are gone.
Can someone get information from a destroyed SIM card?
Not if the chip itself is cut or cracked. That's why you cut through the gold area, not just the plastic around it.
How can I make a SIM card unusable without breaking it?
Ask your carrier to deactivate or block it. Once the line is cancelled or moved to another SIM, the old card doesn't work anymore, even in one piece.
Does destroying my SIM card cancel my number or plan?
No. The line stays active with your carrier until you cancel it or move it. If you're giving up the number, contact your carrier.
Can water destroy a SIM card?
Don't count on it. The chip is sealed in plastic, so water or salt water is not a reliable way to destroy a SIM. Scissors are.
Can I burn a SIM card?
Please don't. Burning plastic and electronics gives off toxic fumes and you risk burns. Cutting the chip with scissors is safer and works.
What should I do if I lose my SIM card?
Call your carrier and ask them to block the SIM. Otherwise, someone could put it in a phone and use your line, including the text codes for your accounts. A SIM PIN helps too: with it, the SIM asks for a code each time it's put in a phone or the phone restarts. On iPhone, go to Settings > Cellular > SIM PIN (Apple: Use a SIM PIN for your iPhone or iPad).
Should I take the SIM card out before selling my phone?
Yes. Take out the SIM card and any memory card, and erase the phone. If you have an eSIM, erase it too.
