Tips and tricks to fix OPPO K9 PRO problems. This phone work with Android 11 & ColorOS 11.3. We can use 5G connection because it is powered by MediaTek MT6893 Dimensity 1200 5G processor. This processor has dedicated GPU (graphic processor unit) Mali-G77 MC9 for fast graphic rendering.

This phone has colorful display using AMOLED type with 120Hz refresh rate for smooth transitions. The screen size is 6.43 inches Full HD+ resolutions. We will give more information, reviews and solutions about how to solve OPPO K9 PRO (PEYM00) troubles at www.hard-reset.org community.

 

What are Advantages of OPPO K9 PRO Specifications and Features?

  • Network GSM 3G HSDPA or 4G LTE + 5G with Dual simcard slot
  • LCD 6.43 inches 20:9 aspect ratio Full HD+
  • Processor Octa-core 1×3.0 GHz Cortex-A78 & 3×2.6 GHz Cortex-A78 & 4×2.0 GHz Cortex-A55
  • GPU Mali-G77 MC9
  • Bluetooth / GPS / Wifi / NFC
  • Memory Internal 128 GB with 8 GB RAM
  • Memory Internal 256 GB with 12 GB RAM
  • Main Camera Triple 64 MP f/1.7 + 8 MP f/2.2 + 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 4500 mAh

 

 

How to Fix or Problem Solving for Recovery OPPO K9 PRO hang or not responding or malfunctions or stuck or freezing or bricked ?

We can choose to use 128 GB or 256 GB internal storage options. This phone has flagship processor with MediaTek MT6893 Dimensity 1200 5G and Mali-G77 MC9 GPU that support for playing games and work with many applications downloaded from Google Play Store. But we have to be careful before download new or not famous applications. Why?

Because there are some bad applications that contain viruses or malware that can make troubles if installed on our OPPO K9 PRO such as 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. We have to read many users reviews before install that kind of apps.

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 Force Shutdown or Force Soft Reset or Reboot or Restart OPPO K9 PRO ?

As high-end smartphone, there are 8 GB or 12 GB RAM that we can choose. However, 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 K9 PRO turning off or shutdown.

 

Performing reboot or restart is recommended anytime we want, because it can help to make our OPPO K9 PRO 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 K9 PRO ?

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 K9 PRO 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.

 

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 K9 PRO with software menu

  1. Turn on the OPPO K9 PRO
  2. Make sure the battery is not empty
  3. Backup important data at OPPO K9 PRO because all data and applications will be erase or delete
  4. Go to Menu :  Setting 
  5. Choose Tab : General
  6. Press Backup & 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. Choose Reset phone 
  9. The OPPO K9 PRO will do the master reset process.

 

hard reset oppo k9 pro

 

#Option 2, Hard Reset OPPO K9 PRO Factory Default using Hardware Secret Button Key

If we can not go to menu, or OPPO K9 PRO 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 K9 PRO
  2. Make sure the battery OPPO K9 PRO already full or more than 50%
  3. Press together and hold the Power Button + Volume Down Button
  4. If the Logo appear, then release the button, after that we will enter some menu
  5. Choose wipe data / factory reset using Volume Button, and press Power Button to Enter or OK
  6. The OPPO K9 PRO will continue master reset, wait for several minutes until OPPO K9 PRO start like new again.

 

How to Unlock or Fix or Bypass or Solutions for OPPO K9 PRO forgot password code or security lock screen pattern or pin (lost password)?

There are many private data and important applications that will saved inside OPPO K9 PRO. We also will have many personal photos videos that taken from triple rear cameras 64 megapixel for wide + 8 megapixel for 119 degree ultrawide + 2 megapixel macro. We need to secure confidential data from unauthorized people when this phone stolen, lost or away from us.

We can use under-display fingerprint sensor or 16 megapixel front camera for facial recognizing. We must choose secondary protection like password or pin or screen lock pattern for backup. Because the fingerprint or face detection can not work after OPPO K9 PRO restart or soft reset or reboot. We need to unlock using backup protection. 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 K9 PRO 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.

HOW TO FORCE SOFT RESET OR RESTART OR REBOOT OPPO K9 PRO LOCKED SMARTPHONE?

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 K9 PRO ?

There is no secret hidden code for OPPO K9 PRO to make it back to factory default. Do the options above to hard reset it.

 

How to Format or Erase Phone Memory at OPPO K9 PRO ?

When we need to remove or wipe any data and applications from OPPO K9 PRO, 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 K9 PRO.

 

How to Make Battery of OPPO K9 PRO Stronger, Life Longer and Not Fast to Drain?

This phone use 4500 mAh non-removable battery capacity. We can use this phone full one day for doing our activity. But for some users, this phone need to recharge after use for half day. Do not worry, because it has fast charging 60W technology.

Please do some adjustment to make OPPO K9 PRO battery work more longer. We need to disable all not use connections like GPS or Bluetooth or Wifi or NFC. We also have to make LCD screen brightness as low as possible to save battery usage.