How to Easily Master format OPPO A9 (2020) / A11X with Safety Hard Reset?

Tips and tricks to fix OPPO A9 (2020) / A11X with CPH1937 / CPH1939 models. This is mid end smartphone with 6.5 inches LCD screen HD 720 x 1600 pixels resolutions. It is comes with Android Pie 9.0 as factory default operating system together with ColorOS 6.1. thi sis mid end smartphone with Qualcomm SDM665 Snapdragon 665 processor and already have dedicated GPU graphic processor unit Adreno 610. OPPO A9 (2020) / A11X have good sound quality because use Dolby Atmos sound system technology. Front camera is located at small notch drop at the top of the screen. Quad cameras are good features at OPPO A9 (2020) / A11X, with 48 MP + 8 MP + 2 MP + 2 MP. Find more review and information about how to solve OPPO A9 (2020) / A11X (CPH1937 / CPH1939) problems at community.

What is Advantage of OPPO A9 (2020) / A11X Specifications?

Network GSM 3G HSDPA or with 4G LTE Dual simcard
LCD 6.5 inches 20:9 aspect ratio
Processor Octa-core 4 x 2.0 GHz Kryo 260 Gold & 4 x 1.8 GHz Kryo 260 Silver
Bluetooth / GPS / Wifi
Memory Internal 128 GB
RAM 4 GB or 8 GB
GPU Adreno 610
Main Camera Quad 48 MP f/1.8 + 8 MP f/2.3 + 2 MP f/2.4 + 2 MP f/2.4
Main Camera Features autofocus, LED flash
Front Camera 16 MP for video conference and selfie photography
Operating System Android Pie 9.0
Battery Li-Po 5000 mAh

How to Fix or Problem Solving for Recovery OPPO A9 (2020) / A11X hang or not responding or malfunctions or stuck or freezing or bricked ?

OPPO A9 (2020) / A11X try to give privileged for active users how have many social media group chat, with big battery 5000 mAh. With big internal memory 128 GB, there are many applications that we can install from Google Play Store like Facebook, WeChat, Skype, Kakaotalk, Whatsapp, Instagram and some other more.

Because this phone have big internal memory, we will have free storage left after install important apps, therefore some users will interested to try new or not famous applications, because the apps title are very interesting. Some new or not famous apps can make troubles at our OPPO A9 (2020) / A11X like hang or stuck or broken or frozen or LCD touch screen not responsive, because they may contain viruses or malware. Therefore we have to read as many user review as possible before download new or not famous apps, especially apps without Verified by Play Protect information / icon.

If we get this problem, we have to try remove temporary files and caches inside this phone, because some troubles can be solve with this steps. If we are suspected infected by virus, then please install one good antivirus like Avast or Norton, then scan all content inside this phone. However, if the problems still happen, then we have to do hard reset to reformat our phone. Please remember, doing hard reset or master format can make our important data removed or wiped from this phone, this is also happen with all Google account which will remove from OPPO A9 (2020) / A11X. We are not recommended to install APK from unknown resource for safety reasons.

How to Force Shutdown or Force Soft Reset or Reboot or Restart OPPO A9 (2020) / A11X ?

Having big internal memory make this phone have free space to install many applications. Sometime they may crash or corrupt, OPPO A9 (2020) / A11X will get some problems like hang or LCD touch screen not responding with any finger touch. We need to do soft reset or reboot to remove temporary files and caches. Please press and hold POWER button until OPPO A9 (2020) / A11X shutdown or turn off by itself. After this phone totally off, then we can press again POWER button to turn it ON. This process will not remove any important data, therefore we can do this process anytime we want. If our OPPO A9 (2020) / A11X still can work properly, but we want to clear temporary files and caches from some applications, then please press and hold POWER button until pop-up menu appear, continue choose Shutdown / Power off / Reboot menu.

How to backup data or Contact at OPPO A9 (2020) / A11X ?

Please use MicroSD to backup all important data inside this phone. We have to choose important data using Android File Manager, then copy that folders and paste to External memory MicroSD.

If our OPPO A9 (2020) / A11X 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, Hard Reset OPPO A9 (2020) / A11X with software menu

  1. Turn on the OPPO A9 (2020) / A11X
  2. Make sure the battery is not empty
  3. Backup important data at OPPO A9 (2020) / A11X because all data and applications will be erase or delete
  4. Go to Menu : Setting
  5. Choose Tab :General
  6. PressBackup & Reset > Restore factory setting
  7. Better you not check anything at the option if you do not want to erase data at data partition at internal memory
  8. ChooseReset phone
  9. The OPPO A9 (2020) / A11X will do the master reset process.

hard reset oppo a9 2020 a11x

#Option 2, Hard Reset OPPO A9 (2020) / A11X Factory Default using Hardware Secret Button Key

If we can not go to menu, or OPPO A9 (2020) / A11X can not turn on or hang or stuck or frozen so we can not access the menu setting or nothing happen while touch the screen, then try to factory reset with secret button and hardware key

  1. Turn off the OPPO A9 (2020) / A11X
  2. Make sure the battery OPPO A9 (2020) / A11X already full or more than 50%
  3. Press together and hold thePower Button + Volume Down Button
  4. If the Logo appear, then release the button, after that we will enter some menu
  5. Choosewipe data / factory resetusingVolume Button, and pressPower Buttonto Enter or OK
  6. The OPPO A9 (2020) / A11X will continue master reset, wait for several minutes until OPPO A9 (2020) / A11X start like new again.

How to Unlock or Fix or Bypass or Solutions for OPPO A9 (2020) / A11X forgot password code or security lock screen pattern or pin (lost password)?

OPPO A9 (2020) / A11X have big internal memory, it mean we can install many applications. Many applications will produce important data. This phone also have great camera with 48 megapixel for wide + 8 megapixel for ultrawide + 2 megapixel + 2 megapixel for tele + 2 megapixel for deep of field. We will have many private pictures. All data inside OPPO A9 (2020) / A11X (CPH1937 / CPH1939) should be secured from unauthorized people. Therefore we have to activate fingerprint which located at back side of body or using 16 mp face unlock detection. After register our fingerprint, we have to choose secondary protections like screen lock pattern or password pin protections. The problems will start happen when we can not unlock this phone or fingerprint can not work for unlock. What should we do?

Don’t worry because we can unlock or bypass forgotten screen lock pattern or password pin protections at OPPO A9 (2020) / A11X use registered Google account. Previous Google account is very important because it can use to make this phone work after force from Hard Reset or Master Format to Factory Default.

New OPPO smartphone already use latest Android version already implement FRP (Factory Reset Protection). FRP is important to secure our phone when it is stolen or lost. Android will ask for previous pin. At some Android version, we can bypass using previous installed Google account username and password after finish performing hard reset or master format. But at some other version update, we still have to type our screen lock pin or password protections. We can bypass using software at personal computer, but these steps are complicated for many users. Therefore we suggest to ask OPPO service center for bypass protections.


If we can not turn off our OPPO smartphone, then please force soft reset or reboot by press POWER BUTTON + VOLUME UP BUTTON for several seconds (usually less then 10 seconds) until this phone reboot by itself.

Is That Any Secret Code for Doing Format OPPO A9 (2020) / A11X ?

There is no secret hidden code for OPPO A9 (2020) / A11X to make it back to factory default. Do the options above to hard reset it.

How to Format or Erase Phone Memory at OPPO A9 (2020) / A11X ?

If we want to format internal memory phone then we have to do hard reset or reformat the operating system of OPPO A9 (2020) / A11X as well. Please use menu setting to do hard reset or reformat using #option 1 above, but make sure to give checkbox mark at Erase Internal SD card / Internal storage. Then it will reformat the factory default operating system and remove or erase any data inside internal memory.

To reformat or wipe or erase all data at external memory, we can use menu Setting > Storage > Erase Internal Storage / SD Card. Please always make sure all data has already backup before reformat or wipe everything, because it is hard to recover formatted / wiped data at internal or external storage.

How to Make Battery of OPPO A9 (2020) / A11X Stronger, Life Longer and Not Fast to Drain ?

As we know one important features of OPPO A9 (2020) / A11X is big 5000 mAh battery, we can use this phone more then two days. Unless we are very heavy users who use this phone several hours continuously for playing games or watch movie, then we OPPO A9 (2020) / A11X battery will not enough. We have to do some adjustment to make it work longer. Please disable all not use connections like GPS or Bluetooth or Wifi. Please make LCD screen brightness as low as possible to save battery life. OPPO A9 (2020) / A11X does not have NFC.

10 thoughts on “How to Easily Master format OPPO A9 (2020) / A11X with Safety Hard Reset?”

    • Hi, please try to follow steps at #option 2 above to do hard reset using hardware button combination key. This steps should hard reset or reformat your OPPO A9 operating system to factory default without PC.

    • Hi, you have to do hard reset using hardware button combination key like steps at #option 2 above. Please do it carefully. After your Oppo A9 operating system finish reset to factory default, then this phone will ask to verified using previous Google account to make sure this phone is belong to you.

    • Hi, please try to do hard reset using hardware button combination key like steps at #option 2 above to reformat your Oppo A9 because forgotten security pattern protection. After your Oppo A9 finish reformat operating system to factory default then you must verified using previous Google account for bypass FRP (factory reset protection). This is to make sure this phone is really belong to you.

    • Hi, please follow steps at #option 2 above to reformat your Oppo A9 operating system to factory default using hardware button combination key. After finish reformat, Oppo A9 will ask for verified with previous Google account to make sure this phone is really belong to you.

    • Hi, you can try to choose one following steps to hard reset using two option above. But you should sign in with previous Google account to bypass FRP after finish reformat your Oppo A9


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