Tips and tricks to fix SAMSUNG GALAXY M21 2021 Edition problems. This is the other M21 version that release with same screen size using Super AMOLED 6.4 inches Full HD+ resolutions at 1080 x 2340 pixels. It is use same processor Exynos 9611, therefore we can not work with 5G LTE for Internet access. However, we can use 4G LTE at dual simcard slots standby together.

The main improvement is about the default operating system using Android 11 with One UI 3.1. While the previous version use Android 10. However, the 2020 version now already get firmware upgrade to Android 11. Some users get issues when using SAMSUNG GALAXY M21 2021 software or hardware, therefore we will try to give more solutions, review and information about how to solve SAMSUNG GALAXY M21 2021 troubles at community.


What are Advantages of SAMSUNG GALAXY M21 2021 Specifications and Features:

  • GSM 3G HSDPA with 4G LTE, Dual Simcard
  • LCD 6.4 inches
  • Internal memory 64 GB with 4 GB RAM
  • Internal memory 128 GB with 6 GB RAM
  • Main Camera Quad 48 MP f/1.8 + 8 MP f/2.2 + 5 MP f/2.4
  • Main Camera Features autofocus, LED flash
  • Front Camera 20 MP for video conference & selfie photography
  • Processor Octa-core 4×2.3 GHz Cortex-A73 & 4×1.7 GHz Cortex-A53
  • GPU Mali-G72 MP3
  • Operating system Android 11
  • Battery Li-Ion 6000 mAh



How to Fix or Problem Solving for Recovery SAMSUNG GALAXY M21 2021 hang or not responding or malfunctions or stuck or freezing or bricked ?

Big internal memory is very important for download many applications. We can download with games and apps from Google Play Store. But we have to be careful before download new or not famous apps, because some of them may contain bad apps or viruses or malware or spyware.

They can work as fake games or security applications. That apps can make troubles at our SAMSUNG GALAXY M21 2021 such as become slowly or stuck or bricks or hang or LCD touch screen not responding or frozen. Google will not give Verified by Play Protect information when the applications are not safe.

When we get this problems we need to remove any temporary files and caches from SAMSUNG GALAXY M21 2021 by process the reboot or restart. We need to install good antivirus like NORTON or AVAST to scan all applications and bad settings inside this phone.

If the problems still happen, then we have to force hard reset or master format to factory default reset with one of the options above. Please note, doing hard reset will remove all important data and installed applications. We need to backup all important data before performing hard reset. For safety reasons, we suggest to stay away from unknown APK, because some of them are not dangerous.


How to Force Shutdown or Force Soft Reset or Reboot or Restart SAMSUNG GALAXY M21 2021 ?

We can choose 4 GB or 6 GB RAM options. After installed many applications, some of them may crash or corrupt that can make SAMSUNG GALAXY M21 2021 frozen or hang or LCD touch screen not responsive. We have to force soft reset or reboot or restart to clean temporary files.


Please press and hold POWER BUTTON + VOLUME DOWN BUTTON to shutdown or restart. We can turn it on again by pressing POWER BUTTON. Do not worry with our data and applications, because soft reset process will not remove any important files. We can do this process anytime we want, especially when some strange situations happen on SAMSUNG GALAXY M21 2021.

We also can do soft reset procedure when our phone still at ON positions, by press and hold POWER BUTTON for several seconds, then the pop-up menu will appear for Shutdown / Reboot / Power off.


Solutions and Tricks For Reset Forgot Samsung Account


How to backup data or Contact at SAMSUNG GALAXY M21 2021  ?

This phone has external memory MicroSD slot. We can copy all important data from internal memory to MicroSD using Android file manager applications. Do not forget to backup photos and videos from internal memory for backup.

We can use USB data cable for connect SAMSUNG GALAXY M21 2021 with computer PC. After our computer can recognize our phone, then use computer File Manager for browse important files inside internal memory and copy to our computer.

If our SAMSUNG GALAXY M21 2021 has already signed in with Google account, by default our contact will be synchronize in the background to Google server. Please make sure we check all contact at Google contact server using Internet browse to make sure backup is done.


#Option 1, How to Hard Reset SAMSUNG GALAXY M21 2021 with software menu:


  1. Turn on this phone
  2. Make sure SAMSUNG GALAXY M21 2021 battery already charge properly
  3. Go to menu: Setting > General tab > Backup & Reset > Factory data reset > Reset device
  4. Choose Erase Everything
  5. SAMSUNG GALAXY M21 2021 will do the process to Master Reset to Factory Default


hard reset samsung galaxy m21 2021 edition

#Option 2, How to Hard Reset SAMSUNG GALAXY M21 2021 with Hardware key button:

  1. Make sure the battery of SAMSUNG GALAXY M21 2021 charge properly or battery have more then 50% capacity
  2. Turn off SAMSUNG GALAXY M21 2021
  3. Press and hold together : Power Button + Volume Up until Logo appear, then release all button
  4. Please wait until we see the menu at LCD screen, choose Wipe Data/Factory Reset with Volume Button to select and use Power Button to ok or enter.
  5. The SAMSUNG GALAXY M21 2021 will do the process of restoring to factory default without any password or passcode (hard reset).


How to Unlock or Fix or Bypass or Solutions for SAMSUNG GALAXY M21 2021 forgot password code or security lock screen pattern or pin (lost password)?

Why we have to activate security protection? Because this phone will have many important data, photos and videos that taken from quad rear camera with 48 megapixel for wide + 8 megapixel for 123 degree ultrawide + 2 megapixel DoF or Bokeh blur effect. By using protection, unauthorized users can not access anything from this SAMSUNG GALAXY M21 2021 when lost or stolen or away from us.

Fingerprint is recommended to use and front camera also can use for facial recognizing. This phone will ask for secondary protection for backup like screen lock pattern or pin or password. Because fingerprint and face detection will not work after SAMSUNG GALAXY M21 2021 reboot or soft reset. We have to unlock using secondary protections. However, the problems will be happen when we forgot all security protection answer, including fingerprint or face detection, what should we do?

If we forgot the security protection, then we have to force hard reset or reformat to factory default by using hardware button combination key like steps at #option 2 above. This phone has FRP (factory reset protection) for secure our phone when stolen or lost. After reformat procedure finish, then we have to bypass the FRP by verified using previous Google account / Gmail account username and password.

We also recommended to activate or create SAMSUNG ACCOUNT at SAMSUNG GALAXY M21 2021, because it can help us to bypass forgotten security protections.


When SAMSUNG GALAXY M21 2021 turn ON but the screen locked then follow this steps: 

  1. Mare sure the battery is not empty or more then 50%
  2. When Screen ON but locked, please press and hold POWER BUTTON + VOLUME DOWN button about 5 seconds until the screen off
  3. When the screen off, please directly continue press POWER BUTTON + VOLUME UP button about 4 seconds and release all button
  4. Then you will go to recovery button, choose Wipe data / Factory Reset, then all data will be wipe or the operating system will be reformat to factory default
  5. Please note, this process need us to use previous Google account for authentication after hard reset finish. For bypass FRP: Verify your account with previous Google Account.



This is the way to help for unlock or bypass forgotten security protection at SAMSUNG GALAXY M21 2021. Although we are sure about our security protection, but sometime we may forget about the right answer. Please note, when we give security protection at our SAMSUNG GALAXY M21 2021, it also give step to put our own PIN / PASSWORD as BACKUP PASSWORD / PIN. This backup PIN use to bypass or unlock forgotten security code later. Use above steps to unlock forgot password or screen lock pattern security protection using Google account or Gmail username and password or Samsung Account.


Is That Any Secret Code for Doing Format SAMSUNG GALAXY M21 2021 ?

We can try to use secret code for doing hard reset SAMSUNG GALAXY M21 2021 is *2767*3855# (some Samsung hardware or firmware update will not work with this code). But please remember to always be careful typing that code, because the SAMSUNG GALAXY M21 2021 will do hard reset and remove all data also installed applications.


How to Format or Erase Phone Memory at SAMSUNG GALAXY M21 2021 ?

If we want to erase all data, files and installed applications from SAMSUNG GALAXY M21 2021, we have to do hard reset or reformat using menu like #option 1 above. We need to choose the checkbox mark for erase or remove data at internal / external memory. All data will be clean up from our SAMSUNG GALAXY M21 2021 including Google account and Samsung account.


How to Make Battery of SAMSUNG GALAXY M21 2021 Stronger, Life Longer and Not Fast to Drain ?

SAMSUNG GALAXY M21 2021 use big battery at 6000 mAh. Many users can use this phone more then 1 day for standard activity. It is already have Fast Charging 15W technology. Some users need to use this phone more longer. Please do some adjustment such as make LCD screen brightness not too bright and disable all not use connections like GPS or Wifi or Bluetooth. SAMSUNG GALAXY M21 2021 still does not have NFC connection.