How do I fix a Samsung Galaxy S21 that will not charge?
Answer
If a Galaxy S21 will not charge, start with a known-good wall charger and cable, clean the USB-C port gently, and try charging while the phone is powered off. If the battery percentage still does not rise, test another charger and cable before considering service.
Before you start: stop right away if…
- Stop using a frayed cable, damaged charger, or wet charge port. Those can create a safety risk.
Follow these steps
Try a wall charger and known-good cable
Unplug any wireless pad or PC USB port. Plug the S21 into a wall charger with a different USB-C cable if possible, and leave it connected for at least 10 minutes.
You should see: A charging indicator appears, or you confirm the phone still will not charge with known-good power.
Inspect and clear the USB-C port
Look into the charge port with a light. If you see lint, gently remove it with a wooden or plastic toothpick. Do not use metal tools.
You should see: The cable seats firmly and stays in place without wobbling.
Force restart, then charge powered off
Force restart the phone, then power it fully off and connect the wall charger again for several minutes before turning it back on.
You should see: The battery percentage is higher after the powered-off charge, or charging begins on the lock screen.
Rule out accessory and software issues
Remove any thick case that blocks the port, try another outlet, and if the phone still never charges, contact Samsung or your carrier for hardware service rather than repeating random resets.
You should see: You either restore charging with a different accessory setup or have a clear hardware service next step.
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Extra tips
What to look for: Whether the charging icon appears, whether the battery percentage increases after several minutes, and any moisture or debris warnings in the port.
Before you change anything: Use only undamaged USB-C cables and a wall charger rated for phone charging. Avoid metal objects inside the charge port. Do not force the cable if it will not seat cleanly. Never share account passwords or one-time codes with unexpected callers.