Samsung Galaxy A21s Common Problems – HOW TO FIX IT?

Hello, how are you? I hope you are having a fantastic day. Today in this article, I have come up with a guide on common problems in Samsung Galaxy A21s smartphone.

If you are facing any type of issue or problem with Samsung Galaxy A21s smartphone, then you can quickly fix those problems by following our guide.

Samsung has recently launched its brand new smartphone called Samsung Galaxy A21s. This device offers the best features in its price range.

But many users are facing problems after using this Samsung Galaxy A21s phone. But don’t worry today. I will show you a proven solution to all questions and issues.

Samsung Galaxy A21s Common Issues and Problems

I have discussed various common issues and problems on the Samsung Galaxy A21s. All the solutions that I have shown below are tested and proven methods.

Please read this article till the end, and be sure to understand every method before applying it to your Samsung Galaxy A21s device. let’s see the Quick specifications of Samsung Galaxy A21s.

Quick Specs Of Samsung Galaxy A21s

Display 6.5 inches Super AMOLED capacitive touchscreen Display. Its pixel resolution is 720 x 1600.
Color Black, Blue, White,  Red
Processor Exynos 850
Octa-core 2.0 GHz CPU
Storage Variants 3GB+32GB
4GB+64GB
6GB+64GB
Rear Camera Quad – 48 MP+ 8 MP+ 2 MP+ 2 MP
Front Camera Single – 13 MP Camera
Battery 5000 mAh Li-Po battery
15W Fast charging
Operating System Android 10, One UI 2.0
Sensors Fingerprint (rear-mounted), accelerometer, proximity

Below I have shared various common issues problems and their solutions. These problems are most common on almost every smartphone.

But if you are facing any problem with your phone, then I am sure that today you will definitely get your solution in this guide.

common problems in Samsung Galaxy A21s

A Laggy or Slowly User interface on your Samsung Galaxy A21s

Do you feel a slow and sluggish user interface while using your smartphone? If yes, then here is the complete solution for your device.

This problem is something that almost everyone experiences. This is the most common smartphone issue and is more common with older phones.

Also this problem occurs in new phones, because your RAM (Random-access memory) is full of apps and files that you don’t use or need.

Please read all the steps carefully and then apply them on your phone.

How to Fix Lag on the Samsung Galaxy A21s device?

  1. If you use any type of antivirus app on your smartphone or use any junk cleaning app, then uninstall it.
  2. One thing is universal: when is the phone slow? In 90% of the cases, if your internal storage is Running out or has come to an end, then your smartphone will be slow. So simply free some storage, and your Samsung Galaxy A21s phone will be back to normal.
  3. Simply uninstall the app you don’t use.
  4. Use the Fast Class 10 Micro SD card on your phone.
  5. Sometimes using a custom theme on the phone makes the phone slow.
  6. If you use the Third Party Launcher, then this may be the cause of this problem. You should uninstall the Third Party Launcher and use the System Launcher.
  7. Use the lite version application like Facebook Lite, Twitter Lite, YouTube Go, etc.
  8. Update your phone to the latest OS available.
  9. Update all your apps whenever an update is available in the Play Store.
  10. Following all these steps, if you feel that your phone is still slow, then you try Hard Reset your phone.

With the help of all the steps above, I have discussed all possible solutions so that you can quickly fix the Lag or slow user interface problems on your Samsung Galaxy A21s device.

Fast Battery Drain on your Samsung Galaxy A21s

If your Samsung Galaxy A21s battery is draining drastically, then you can follow the steps given below. By following the below steps, you can be sure that what is causing the Fast Battery Drain problem on your smartphone.

How to fix fast battery drain on the Samsung Galaxy A21s device?

  1. If you have installed apps like Phone Cleaner, uninstall it. Because these apps run in the background and consume your phone’s battery.
  2. Download the app from the play store itself. Because third-party apps can contain malware that runs on the phone background and consumes a lot of battery.
  3. If GPS is not needed, always turn off GPS.
  4. Keeping the phone in power saving mode for a long time also drains the battery quickly.
  5. If you have installed an app that claims to increase your phone’s battery backup, then uninstall this type of app.
  6. Using high screen brightness settings on the Samsung Galaxy A21s can drastically reduce your battery. So use the phone with average brightness.
  7. Clear all your recently used apps from the recent app tab because it drains the battery quickly.
  8. If NFC, Bluetooth, Wi-Fi are not needed, always keep them turn off.
  9. Following all these steps, if you feel that your phone is still Fast Battery Drain, then you try Factory Reset your Samsung Galaxy A21s.

After following the above steps, I am sure that you will not have to face the battery draining issue again. If you are still experiencing this problem, then contact your smartphone customer support and follow the instructions.

Related Article Common Problems In Samsung A51 And Fix Them!

Cellular Network Issue Or Mobile Data Problem On The Samsung Galaxy A21s.

If you face cellular network issues on your Samsung Galaxy A21s. And if your phone is not getting the proper signal or the mobile data network is not working, and you see fluctuations on the phone network, then you should try the below steps.

How To Fix Cellular Network Issue Or Mobile Data Problem On The Samsung Galaxy A21s?

  1. Remove SIM card from your Samsung Galaxy A21s device and insert the SIM again.
  2. Turn ON airplane mode for 30 seconds, and after a few seconds, turn it OFF again.
  3. Reset your network settings.
  4. Be sure to restart your Samsung Galaxy A21s once and check if your problem is fixed.

This is a common problem, and you can troubleshoot this problem by following all these steps. If you still have a network problem with your Samsung Galaxy A21s, Then be sure to leave a comment, I will guide you further.

Heating Problem On your Samsung Galaxy A21s

There are two primary reasons for a smartphone to heat up, one is the phone’s SoC (System On Chip), and the second one is the phone battery. If you are facing a heating problem in your Samsung Galaxy A21s, then you can fix it with few changes.

How to fix heating Problem On your Samsung Galaxy A21s?

  1. While charging the phone, remove the phone case.
  2. Do not play games while charging your phone, and do not use the phone too much.
  3. Charge your Samsung Galaxy A21s with the original charger only.
  4. Heating problems are also caused by playing games for a long time on your phone.
  5. Do not install third-party apps. Always download apps from the play store.
  6. Do not overcharge your phone, and this can also cause heating problems.
  7. Always keep your Samsung Galaxy A21s updated and keep updating all your apps.

I hope all these steps will reduce your phone’s heating problem and temperature if your phone still has a heating problem, then go to the service center and resolve it.

Must See – Common Problems In LG W30 Pro And Fix Them!

Apps Opening Slowly On The Samsung Galaxy A21s

This problem is very common because this problem is found in all Android phones, and this problem is basically due to improper RAM management of the phone. If the app in your phone is opening slowly, then follow the steps given below, so that you can solve this problem.

How To Fix Apps Opening Slowly On The Samsung Galaxy A21s?

  1. First, check if your phone’s internal storage has enough storage. If not, uninstall the apps you don’t use.
  2. Use the lite version application like Facebook Lite, Twitter Lite, YouTube Go, etc.. This can reduce more RAM usage on your phone.
  3. If you have installed any type of Mod Apps in your Samsung Galaxy A21s, uninstall it immediately.
  4. Following all these steps, if you feel that your apps are still opening slowly, then you try Factory Reset Samsung Galaxy A21s.

Related – Common Problems In Samsung M30S And Fix Them!

Samsung Galaxy A21s Phone unexpectedly shutting down

This problem is common because this problem occurs in all Android phones. In this problem, your phone suddenly turns off. If you are facing this type of problem with your Samsung Galaxy A21s smartphone, then definitely consider the steps given below.

How to fix sudden shutdown in Samsung Galaxy A21s?

  1. If the temperature of the phone rises to the maximum level, then it can also be the reason for the sudden shutdown of your phone, so take care of heating issues.
  2. Do not use a heavy back cover as this may cause heating problems.
  3. Following all these steps, if you feel that your phone is still sudden shutdown, then you try Factory Reset your Samsung Galaxy A21s.

I hope all these steps will solve the sudden shutdown issue on Samsung Galaxy A21s. But you still encounter this issue, then go to the service center and resolve it.

Samsung Galaxy A21s Screen frozen or stuck

You may face this problem while doing a task, playing a game, or making a call. Follow the steps given below to fix this problem.

How to fix screen froze or stuck on Samsung Galaxy A21s?

  1. Update your phone to the latest OS available.
  2. Simply uninstall, and Force stops the app you don’t use.
  3. If you are experiencing this problem while using an app, then you go to Settings> Application Manager Then clear the cache of the app you are facing problems.
  4. In the last step, perform a factory reset your Samsung Galaxy A21s smartphone. It can solve all your problems.

Screen flickering Issue In Samsung Galaxy A21s

If the screen of your Galaxy A21s is flickering, then first you need to find out whether the problem is related to software or hardware.

Don’t worry, screen flicker is a common problem, and it is usually caused by a software issue that can be caused by a glitch in the software bug.

How to Fix Screen flickering Issue In Samsung Galaxy A21s?

  • First of all, make sure that your device is updated with the latest software version.
  • Once, Restart your Samsung A21s.
  • Disable adaptive brightness in Galaxy A21s.
  • Clear the cache on your Samsung device, then see if your screen flickering problem is fixed or not.
  • Check your device in Safe Mode.
  • That’s It 🙂

If you have followed all the steps mentioned above and your smartphone’s screen is still flickering, please contact your nearest Samsung service center for further assistance.

Apps and Games Crashes Suddenly or Unexpectedly on the Samsung Galaxy A21s

If you open an app or game, and that app suddenly closes, then this is a common problem and follow the steps below to solve this problem.

How to fix sudden app crashes on Samsung Galaxy A21s?

  1. Update your apps to the latest version.
  2. Uninstall and reinstall the app. This will fix the app’s sudden crashes problem.
  3. If your phone has Power Saving Mode Enabled, then Disable it.
  4. If you are experiencing this problem while using an app, then you go to Settings> Application Manager Then clear the cache of the app you are facing problems.

The above steps can be used to solve this problem. If you are still facing this problem, then leave a comment mentioning your problem.

If you are looking for a guide on how to Root Samsung Galaxy A21s, then make sure to check out that article as well.

Apps not downloading from the Play Store on Samsung Galaxy A21s

How to Fix Apps not downloading from the play store on Samsung Galaxy A21s?

Sometimes this problem occurs due to the new update of the Play Store. This is a common problem that you may have to face. You can find a solution to this problem with the steps given below.

  1. First of all, reboot your phone and see if your problem is resolved or not.
  2. Clear the Play Store local search History.
  3. Go to Settings then go to App Manager and clear Play Store Cache.

Must Read: Keeps showing the ‘Camera Failed’ error on your Galaxy A10e: How to Fix It?

Screen flickering Issue In Samsung Galaxy A21s

If your smartphone’s screen is flickering, then the first thing you need to do is to find out whether the problem is related to software or hardware.

Screen flickering is a common problem, and it is usually caused by a software problem that may be caused by glitch in a software bug.

What to do if your Galaxy A21s screen is flickering?

  • First of all, make sure that your device is updated with the latest software version.
  • Once, Restart your Galaxy A21s.
  • Also, Disable adaptive brightness in Galaxy A21s.
  • Clear the cache on your Samsung device, then see if your screen flickering problem is fixed or not.
  • Boot your device into Safe Mode and check your problem is fixed or not.
  • That’s It 🙂

If you have followed all the steps mentioned above and your smartphone’s screen is still flickering, please contact your nearest Samsung service center for further assistance.

Here I have covered all the issues and problems regarding the Samsung Galaxy A21s smartphone and try to fix them.

If you still have any other problems with your Samsung Galaxy A21s, then leave a comment below, and I will update the article.

Conclusion

So, I have shown you the complete guide on how to fix common problems in Samsung Galaxy A21s. I hope you find this article useful and you are able to solve the problem on your Samsung Galaxy A21s device.

If you have any doubts or questions related to this guide, then make sure to drop a comment, and I will try to resolve your issue as soon as possible.

43 thoughts on “Samsung Galaxy A21s Common Problems – HOW TO FIX IT?”

  1. Hello,
    Unfortunately, We tried following the above on how to fix Cellular network or Mobile data problem on the Samsung Galaxy A21s and it did not work. Can you please advise?
    thank you!

    Reply
    • Even if you follow all the steps, your problem is not solved.

      So you must showing your smartphone once at the nearest Samsung service center, because this problem also arises from hardware problems.

      Thanks for your valuable comment….!

      Reply
  2. I’m having a problem with if I turn my A21s off , on start up it goes into flight mode and safe mode , even trying a reset doesn’t solve the problem and I’m left with the phone in safe mode that won’t switch off , is this a common problem and does anyone have a solution ?

    Reply
  3. My Samsung A21s has frozen, it turns on and my fingerprint opens it, but after that I cannot do anything with it. Used my partners phone to call me but it would not let me answer. Don’t know wat to do.

    Reply
  4. Hi,

    My apps have stopped working and keeps coming up with a box with 3 options, close app, send info and I can’t remember last one sorry. How do I rectify this cos I desperately need to be in one of the apps.

    Thank you in advance.

    Reply
  5. Hi I’ve got an A21s and have started having the same problem since about midnight last night. Gmail just freezes and crashes as soon as I open it and other apps the same. Comes up with 3 options but when you click send feedback that crashes too. I’ve tried uninstalling and installing, clearing cache and data but no joy. I thing my fiancées phone is now also having the same problems

    Reply
  6. Apps crashing or not openeing.

    Tried the advice and still not working, any further help gratefully received as I need to be able to use my emails

    Reply
  7. Regarding apps crashing according to samsung online help you need to update Andriod System webview, things will be ok after that

    Reply
  8. Any application i try opening opens then still suddenly closes and gives an error code stating “google play keeps stopping”, can anyone help me with this as any app i try opening does this? Thanks in advance.

    Reply
  9. I am having same issues as people have said this in forum, get 3 options one to wait, one to close and one to report. When doing report it just closes, please can I get some help, thanks in advance.

    Reply
    • First, thank you for the clear straight forward suggestions! My question is how to make the screen stay on no matter how long a call is. I know I can push the power button to bring back the screen from dark, but it I do that more than once, the call gets cut off. Sometimes I am on hold for a long time, then someone answers so I click TBE power button, talk a bit, screen does dark, then I need the key pad for something, click the power button and poof, the call is gone. Thank you!

      Reply
    • Thanks for Your Valuable Comment and Feedback!

      You have to turn off autoplay, so that automatic next episode will not start automatically.

      To do this follow the steps given below:

      1. First, go to your Account Page.
      2. Then open the Profile & Parental Controls settings of the profile you want to manage.
      3. Now change the playback settings, and uncheck it Autoplay next episode in a series on all devices.
      4. Last step, choose Save.
      5. That’s It 🙂
      Reply
  10. Since two days I am facing a problem that after changing two sim my A21s doesn’t support it constantly showing not registered on network.
    But the same sim card is working properly on other mobile phones.
    Can you please advice?

    Reply
  11. I have a charging problem. Occasionally it will charge fine. Most of the time it’s telling me 8-10 hours for a full charge. I’ve tried the obvious, different chargers, resetting the phone but neither has helped
    Any idea?
    It’s only about 4 months old

    Reply
  12. My A21s has now deleted everything on my SD card (mostly photos) TWICE, from two different, purchased new and previously unused, Samsung-branded SD cards. I get a notice (System UI) that an SD card was removed unsafely (it wasn’t) ,and to restart my phone, but by that time (before restarting), the card appears to have been wiped. Is this a known glitch, a virus, or a flaw with my phone? Is there a fix?

    Reply
  13. My Samsung Galaxy A21s won’t stop flickering!! I can’t turn it off as it’s flickering all the time. Please help?

    Reply
      • As above – Samsung A21s
        Ran update and now have FLASHING not FLICKERING screen, it actually flashes on and off between the home screen display and black off screen. I cannot swipe, cannot turn off, cannot get it to do anything the except flashing. I’ve removed and replaced sim card, but cannot get into the device to remove the battery or into the phone to run a factory reset
        If you can get the phone to show the power off screen (still flashing) holding the off icon does nothing…

        Reply
  14. I found my phone screen suddenly stop when I started to play a game. The screen didn’t response to touch. pressing any button effects nothing. I can’t managed to resolve this. I ‘ve waited for 6 hours. it stays still.

    Reply
  15. I had problem on android galaxy a 21, my gifs search quit working, and could only choose from certain categories; This was easily fixed by downloading free g-board keyboard, way better than Samsung keyboard anyway. I tried lots of ways to fix the problem, when the answer was easy, quick and simple. Sheesh. I read and tried so many ways before this solution, wasting time and getting frustrated.

    Reply
  16. my a21s is very dark and only when I am in the sun it becomes a little bright, I have tried all the brightness options in settings but nothing seems to be working. what do you think might be the problem and what can I do to fix it

    Reply
  17. Hi
    When I wake my A21s up the home screen flashes on and off rapidly. I press the button to turn it off and the screen with the on/off, restart and emergency appears but it is still flashing on and off rapidly so I cannot turn the phone off to restart

    Reply
  18. Hi,
    I have A21s On/off button to bring back the screen from dark, it’s not coming back. I can hear the sound but tried many times not coming back. Can you advise me next option.
    If, I want to change as it is still on guaranteed is that possible.

    Reply
  19. After a couple of minutes on a call my A21 audio starts to break-up so the person on the other end can’t hear me or miss bits of what I am saying, it is a lso difficult to hear on speaker phone. As I can then ring the person back on my second phone A20e without any issues it is clear that the phone is the problem.

    What are the options

    Reply

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