How to Easily Master Format OPPO K9X with Safety Hard Reset?

Tips and tricks to fix OPPO K9X problems. This is mid-end smartphone that use Android 11 when the first time release at the market. We can use dual simcard slot with different network number using 5G connection for broadband Internet access. It is use 6 nm FitFET processor MediaTek Dimensity 810 5G with dedicated GPU (graphic processor unit) Mali-G57 MC2 for graphic rendering.

OPPO K9X use 90Hz IPS sscreen 6.49 inches size at 1080 x 2400 pixels resolutions. The screen is protected with Aluminosilicate glass. Front camera located on top right screen with 16 megapixel resolutions. We will give more solutions, review and information about how to solve troubles of OPPO K9X at community.

What are Advantages of OPPO K9X Specifications and Features?

  • Network GSM 3G HSDPA or 4G LTE + 5G with Dual simcard slot
  • LCD 6.49 inches 20:9 aspect ratio
  • Processor Octa-core 2×2.4 GHz Cortex-A76 & 6×2.0 GHz Cortex-A55
  • GPU Mali-G57 MC2
  • Bluetooth / GPS / Wifi
  • Memory Internal 128 GB with 6 GB or 8 GB RAM
  • Memory Internal 256 GB with 8 GB RAM
  • Main Camera Triple 64 MP f/1.7 + 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 11
  • Battery Li-Po 5000 mAh

Solutions To Fix Camera Issues on OPPO K9X

How to Fix or Problem Solving for Recovery OPPO K9X hang or not responding or malfunctions or stuck or freezing or bricked ?

We will use internal memory to keep all installed applications and games that downloaded from Google Play Store. This phone has external memory slots for MicroSDXC memory card. Please note, there are many new or not famous apps or games that may contain viruses or malware. Therefore we have to read many user reviews before install that kind of apps.

If we install that kind of apps, then our OPPO K9X will get some troubles like hang or freezing or become slowly or stuck or broken or LCD touch screen not responsive. These kind of apps will not get Verified by Play Protect information / icon.

What do we have to do? Please try to remove temporary files and caches from internal memory by performing soft reset or reboot. We might get some help from antivirus applications like AVAST or NORTON to find suspected application and fix some bad setting options.

We also can clean temporary files and caches anytime by performing reboot or restart. This procedure will not remove any installed applications and important data, therefore we can do this process anytime we want. Please do not install APK from unknown resource for safety reasons.

How To Make Faster OPPO K9X Performance – Fix Slowly Issues?

How to Force Shutdown or Force Soft Reset or Reboot or Restart OPPO K9X ?

OPPO K9X has two options of RAM to choose with 6 GB or 8 GB. Having bigger RAM will give better performance when we run multitasking applications. Some other installed applications also can get hang or make LCD touch screen not responding. We have to force reboot or soft reset or restart by press and hold POWER button until OPPO K9X turning off or shutdown.

Performing reboot or restart is recommended anytime we want, because it can help to make our OPPO K9X become faster. It will remove any temporary files and caches. All applications and data will not removed or wipe because of soft reset or reboot or restart.

How to backup data or Contact at OPPO K9X ?

This phone has external memory slot for MicroSDXC memory card. We can copy and paste all important files, photos, videos from internal memory using Android file manager.

We can use USB data cable to connect with computer. After our phone recognize by computer, then choose important files using computer file manager and copy to safety location at our computer.

If our OPPO K9X 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.

More Complete Solutions To Backup & Restore Data / Contacts / Photos on OPPO K9X

Please note: These options bellow may not work for some devices because of firmware update version or hardware troubles or some other possibilities.

#Option 1, Hard Reset OPPO K9X with software menu

  1. Turn on the OPPO K9X
  2. Make sure the battery is not empty
  3. Backup important data at OPPO K9X 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 K9X will do the master reset process.

hard reset oppo k9x

#Option 2, Hard Reset OPPO K9X Factory Default using Hardware Secret Button Key

If we can not go to menu, or OPPO K9X 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 K9X
  2. Make sure the battery OPPO K9X 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 K9X will continue master reset, wait for several minutes until OPPO K9X start like new again.

How to Unlock or Fix or Bypass or Solutions for OPPO K9X forgot password code or security lock screen pattern or pin (lost password)?

This phone has 128 GB or 256 GB internal memory options. After use this phone for several months, we will have many important applications and data. We also will have many private photos videos that shoot with three rear cameras 64 megapixel for wide + double 2 megapixel for macro and DoF or bokeh blur effect. We have to make sure all data are protected from unauthorized people when OPPO K9X away from us or stolen or lost.

We can use 16 megapixel front camera for facial recognizing or side body fingerprint. The next step is choose the secondary protection like screen lock pattern or pin or password for backup. Because OPPO K9X fingerprint or face detection will not work after restart or reboot or soft reset. However, the problems will start happen when we can not unlock this phone or fingerprint can not work. What should we do?

If we forgot or can not unlock OPPO K9X security protection, then nothing we can do unless doing hard reset or master format using hardware button combination key like steps at #option 2 above. For more security protection, latest Android version has FRP (factory reset protection), therefore it will ask for previous Google account username and password to bypass FRP question.


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 K9X ?

There is no secret hidden code for OPPO K9X to make it back to factory default. Do the options above to hard reset it.

How to Format or Erase Phone Memory at OPPO K9X ?

When we need to remove or wipe any data and applications from OPPO K9X, then please performing hard reset or reformat. Please choose Erase all data / Internal storage when our phone has that menu. Performing hard reset or reformat will remove any registered Google account from OPPO K9X.

How to Make Battery of OPPO K9X Stronger, Life Longer and Not Fast to Drain ?

Having big battery is one good advantages when using OPPO K9X. It has 5000 mAh non removable battery. Some users can use this phone more then one day without recharge. However, if we use this phone too much for playing games or watching movie several hours continuously, then the battery will not enough.

We have to do some adjustment to make OPPO K9X battery work more longer or not fast to drain. Please set the LCD brightness as low as possible, because it can reduce the battery power usage. We also have to disable all not use connections like GPS or Bluetooth or Wifi. NFC is not available on OPPO K9X.

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