01Cable, charger or port: the two-minute swap test
When a USB-C cable is not charging your phone, the cable is the most likely culprit, but not the only one. Change one part at a time and the result tells you exactly what failed.
Cables take the most abuse. They get bent at the same spot by the plug every night, yanked out sideways, run over by desk chairs and chewed by pets. Chargers fail less often, and phone ports fail least of all, though they do fill up with lint. Borrow a cable and charger you know work (from another phone in the house is fine) and use this table.
| What you swap | Phone starts charging? | What it tells you |
|---|---|---|
| Your charger + a known-good cable | Yes | Your cable is the problem. Replace it. |
| Your cable + a known-good charger | Yes | The charger or that outlet is the problem. Try another outlet before replacing the charger. |
| Known-good cable + known-good charger | No | Look at the phone's port, then software and heat. |
| Your cable, wiggled at the plug end | Only at certain angles | Broken wire inside the strain relief. The cable is done. |
| Your cable into a laptop USB port | Yes, but slowly | Cable works. Laptops supply far less power than a wall charger, so this only rules out a dead cable. |
02Fixes, cheapest first
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Push the plug all the way in
A USB-C plug should click in flush with the phone's frame. If it sits a millimeter proud, or it wobbles, something is in the port. Thick cases with a narrow cutout can also stop the plug seating. Try once with the case off.
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Flip the plug
USB-C is reversible, but a cable with one damaged contact can work one way round and fail the other. If flipping it fixes things, that cable is on borrowed time.
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Change the outlet and the brick
Power strips with switches, USB ports on cheap extension cords and car ports all fail quietly. Plug straight into a wall outlet with a USB-C charger you trust.
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Clean the port
Power the phone off, shine a light in and gently lift out lint with a wooden or plastic toothpick. Details in the next section.
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Restart the phone
A software hang can stop charging from starting. On iPhone, hold the side button and a volume button and slide to power off. On Android, hold the power button (or power and volume down on Galaxy phones) and pick Restart.
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Let it cool
A hot phone pauses charging to protect the battery. If it's warm from gaming, sun or a car dashboard, unplug it and give it 15 minutes. iPhones may show a Charging On Hold alert when this happens.
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Check for a moisture warning
Galaxy phones and iPhones can block charging when they detect liquid in the port. Let the phone dry fully, port facing down, and don't use heat or compressed air to speed it up.
If nothing above works and the phone won't charge on any known-good cable and charger, including wirelessly if it supports it, book a repair. That points to the charging port or the battery, which no accessory will fix.
03Lint in the port is more common than you'd think
Every time you push a plug into a phone that lives in a pocket, you pack a little more fluff into the bottom of the port. After a year or two it builds into a felt pad that stops the plug from reaching the contacts. The phone might charge only if you hold the cable at an angle, or it might not charge at all.
- Turn the phone off completely.
- Shine a flashlight into the port. Lint looks gray and matted at the very back.
- Use a wooden or plastic toothpick. Slide it along the back wall and lift outward, gently. Don't scrape the center tongue where the contacts are.
- Tip the phone and tap it lightly on your palm to drop loose bits out.
- Plug in again. You should feel a firmer click than before.
Pins, paper clips and SIM tools can short or bend the contacts. Skip cleaning sprays and don't blow into the port: breath carries moisture. If the port looks corroded or a pin is bent, that's a repair job.
04It charges, just slowly: when the cable caps your speed
A cable can be working perfectly and still be the reason charging feels broken. Not every USB-C cable carries the same power, and some charger-and-cable combinations can't do fast charging at all.
| Cable type | Max power it carries | Good for |
|---|---|---|
| USB-A to USB-C | Depends on the charger; no USB Power Delivery | Overnight charging, older bricks and car ports |
| USB-C to USB-C, standard (3A) | 60W | Fast charging every iPhone and most Android phones |
| USB-C to USB-C, 5A with e-marker | 100W or 240W | Samsung 45W and 60W modes, laptops |
| USB-C to Lightning | Enough for fast charging on iPhone 8 to 14 | Older iPhones with a USB-C charger |
The usual trap is a USB-A to USB-C cable plugged into an old cube. It works, but it can't negotiate USB Power Delivery, so you're stuck at a slow trickle. The other trap is on Galaxy phones: Samsung's 45W mode (and 60W on the S26 Ultra) needs a 5A cable, so a normal 60W cable drops you to 25W. Our e-marker cable explainer covers how to tell them apart, and why is my phone charging slowly covers the non-cable causes.
05Signs a cable has reached the end
A frayed cable isn't only annoying. Exposed wires can short and heat up, so retire it rather than wrapping it in tape. When you buy a replacement, a braided jacket and a decent strain relief at each plug make the biggest difference to how long it lasts. If you charge in the car too, see car charger not working.
USB-C to USB-C for modern phones, plus a Lightning option for iPhone 14 and earlier.
Questions people ask
Why does my USB-C cable only work at certain angles?
Either a wire is broken inside the cable near the plug, or lint in your phone's port is stopping the plug seating fully. Try a different cable. If the new one is fine, the old cable is broken. If the new one does the same, clean the port.
Can a USB-C cable stop working suddenly?
Yes. The thin wires inside break from repeated bending near the plug, and that often happens with no visible damage. One day it works, the next it doesn't. Swapping in a known-good cable is the fastest way to confirm it.
Why is my phone charging but not fast charging with a USB-C cable?
Check the charger first: it needs USB Power Delivery and enough watts for your phone. Then the cable: USB-A to USB-C cables can't do Power Delivery, and Samsung's 45W mode needs a 5A cable rated 100W or more.
Is it safe to clean my phone's charging port with a toothpick?
Yes, if you're gentle and the phone is off. Use wood or plastic, never metal, and work along the back wall rather than scraping the contacts in the middle. If you can't shift it or the port looks damaged, ask a repair shop.
Does the cable that came with my phone work with any charger?
A USB-C to USB-C cable works with any USB-C charger. It will charge at whatever speed the charger, cable and phone all agree on. Many newer phones ship without a charger, so check you're not pairing that cable with an old 5W cube.