The Samsung A21 is a powerful and reliable Android smartphone, but, like all electronic devices, it can sometimes have problems. One of the most common issues that users of the Samsung A21 have experienced is that the phone won’t charge. Thankfully, this is something that can usually be fixed with a few simple steps. In this blog post, we’ll be looking at some of the most common causes of this charging issue and the best ways to fix them.

Assessing the Problem

The first thing to do when your Samsung A21 won’t charge is to assess the situation. Examine the charging port, charger and cable to make sure that they are all working correctly. If the charger is blocked in any way or the cable is frayed or broken, then it won’t be able to connect your phone to the power source. If everything looks fine, try connecting your phone to a different charger, cable and power source.

Checking the Battery

If your Samsung A21 still won’t charge, then the next step is to check the battery itself. Over time, the battery can accumulate debris, dust and dirt which can prevent it from charging. To check the battery, you can use a soft cloth to carefully wipe away any debris that you can see. Additionally, remove the battery and look for any visible damage or corrosion, and if present, contact Samsung Support.

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Charging the Battery

If the battery is clean, use the charger that came with your phone and plug it into a wall outlet. Leave it to charge for a few hours and then try to turn on the phone. If the phone turns on and functions normally, then the problem was just a drained battery.

Rebooting the Phone

Sometimes, the issue could be caused by a software issue, like a bug or an error. To fix this, try rebooting your Samsung A21. To do this, press and hold the power button for 10 seconds until the phone turns off. Then, once the phone is off, press the power button again to turn the phone back on. This can help to clear any errors or bugs that are causing the phone to not charge.

Installing System Updates

If your Samsung A21 still won’t charge, then it could be because it’s running an outdated version of the Android operating system. To check if any updates are available, go to the “Settings” menu, then select “System updates” and follow the on-screen instructions. Installing updates can help to fix any bugs or software issues that are preventing your phone from charging.

Checking for Apps That Drain the Battery

Sometimes, there can be apps running in the background that are draining your battery and preventing it from charging. To check for this, go to the “Settings” menu and select “Battery usage”. This will show you a list of apps that are draining your battery. If there are any apps that you don’t need, you can disable or uninstall them to help save battery power.

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Using Safe Mode

If you continue to experience charging issues, you may want to try using Safe Mode. This will help you to identify any third-party applications that are causing the issue. To put your Samsung A21 into Safe Mode, press and hold the power button until the power menu appears, then press and hold the power off button. When the Reboot to Safe Mode prompt appears, tap OK.

Cleaning the Charging Port

If you’re still having trouble charging your Samsung A21, then you may need to clean the charging port. This can be done with a can of compressed air or with a soft-bristled brush. Be careful not to damage the port, and make sure that all of the debris is removed.

Replacing the Cable or Charger

If the charging port is clean and the problem persists, then it may be a good idea to replace the cable and/or charger. Make sure to buy one that is compatible with your device, and to only buy from a reliable source.

Contacting Samsung Support

If you’ve tried all of the steps above and your Samsung A21 still won’t charge, then it’s time to contact Samsung Support. They can help you to identify the root cause of the problem and provide you with the best solution.


Fixing the problem of a Samsung A21 not charging can be a challenge, but with the right steps it’s usually possible to get your phone back up and running. First, assess the situation and try connecting your phone to a different charger, cable and power source. If the problem persists, then check the battery and charging port for debris, and try rebooting your phone or installing system updates. Additionally, you may want to check for apps that are draining your battery or use Safe Mode. Finally, if all else fails, you may want to replace the cable or charger, or contact Samsung Support.

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No matter what, staying patient and following the steps outlined in this guide can usually help you to get your Samsung A21 up and running again. For more information, be sure to check out Samsung’s official support website and Android Central Forums, where you can get help from other users and experts.