Tips and tricks to fix OPPO RENO4 PRO problems. This is non 5G smartphone with model code CPH2109. This phone is different with OPPO RENO4 PRO 5G, especially at processor type. This OPPO RENO4 PRO use Qualcomm processor SM7125 Snapdragon 720G with dedicated GPU (graphic processor unit) Adreno 618. For give better color, it use Super AMOLED screen type with 6.5 inches width at FHD+ resolutions.

OPPO RENO4 PRO (CPH2109) has been installed with Android 10.0 together with ColorOS 7.2 user interface. At right top front screen, there are small punch hole for single front camera and this phone has four vertical rear camera. Some users get issue when using OPPO RENO4 PRO software and hardware. We will try to give more solutions, reviews, and information about how to solve OPPO RENO4 PRO troubles.


What are Advantages of OPPO RENO4 PRO Specifications and Features?

  • Network GSM 3G HSDPA or 4G LTE with Dual simcard slot
  • LCD 6.5 inches 20:9 aspect ratio
  • Processor Octa-core 2×2.3 GHz Kryo 465 Gold & 6×1.8 GHz Kryo 465 Silver
  • Bluetooth / GPS / Wifi / NFC
  • Memory Internal 128 GB and 256 GB
  • RAM 8 GB
  • GPU Adreno 618
  • Main Camera Quad 48 MP f/1.7 + 8 MP f/2.2 + 2 MP f/2.4 + 2 MP f/2.4
  • Main Camera Features autofocus, LED flash
  • Front Camera 32 MP for video conference and selfie photography
  • Operating System Android 10.0
  • Battery Li-Po 4000 mAh



Solution To Fix Camera Issues On OPPO RENO4 PRO


How to Fix or Problem Solving for Recovery OPPO RENO4 PRO hang or not responding or malfunctions or stuck or freezing or bricked ?

OPPO RENO4 PRO comes with Qualcomm SM7125 Snapdragon 720G processor. We can choose to have 128 GB or 256 GB internal storage. External memory can be use with MicroSD or MicroSDXC. We can install many applications from Google Play Store like WeChat, Facebook, Instagram, Zoom, Line messenger or something like that.

We are not suggest to install any applications without read many user reviews, especially new or not famous apps. Because some of them may contain viruses or malware that can make OPPO RENO4 PRO (CPH2109) work not normal like become slowly or hang or stuck or broken or frozen or LCD touch screen not responsive. These kind of apps will not get Verified by Play Protect information or notification.

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 RENO4 PRO. 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 RENO4 PRO ?

8 GB is enough RAM capacity for multitasking performance. But some installed apps may crash or corrupt. Our OPPO RENO4 PRO will run not normal such as become 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 RENO4 PRO 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 RENO4 PRO 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 RENO4 PRO ?

This phone has external memory slot for backup any data from internal storage to external memory by using Android file manager.

we also 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 RENO4 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 RENO4 PRO with software menu

  1. Turn on the OPPO RENO4 PRO
  2. Make sure the battery is not empty
  3. Backup important data at OPPO RENO4 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 RENO4 PRO will do the master reset process.



hard reset oppo reno 4 pro

#Option 2, Hard Reset OPPO RENO4 PRO Factory Default using Hardware Secret Button Key

If we can not go to menu, or OPPO RENO4 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 RENO4 PRO
  2. Make sure the battery OPPO RENO4 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 RENO4 PRO will continue master reset, wait for several minutes until OPPO RENO4 PRO start like new again.


How to Unlock or Fix or Bypass or Solutions for OPPO RENO4 PRO forgot password code or security lock screen pattern or pin (lost password)?

The minimum internal storage is 128 GB and the biggest version use 256 GB. This phone will has many important data and photos videos which taken from 48 megapixel wide + 8 megapixel ultrawide + 2 megapixel macro + 2 megapixel DOF. We need to secure all confidential data from unauthorized people when OPPO RENO4 PRO away from or lost or stolen.

Fingerprint is located under display. We need to register our finger or face when using face unlock recognizing. Fingerprint and face unlock detection will not work after finish restart or reboot, we need to choose secondary protection for backup like screen lock pattern or password or pin. The problems will start happen when we can not unlock this phone or fingerprint can not work. What should we do?

Don’t worry because we can unlock or bypass forgotten screen lock pattern or password pin protections at OPPO RENO4 PRO use registered Google account. But we have to force hard reset or master format using hardware button combination key like steps at #Option 2 above. 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 to Verify your account with previous Google Account. This procedure target is to make sure that this phone is really belong to us.

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, but we have to proof that this is our phone. We also recommended to activate or create OPPO ACCOUNT at OPPO RENO4 PRO, because it can help us to bypass forgotten security 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 RENO4 PRO ?

There is no secret hidden code for OPPO RENO4 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 RENO4 PRO ?

If we want to format internal memory phone then we have to do hard reset or reformat the operating system of OPPO RENO4 PRO 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 RENO4 PRO Stronger, Life Longer and Not Fast to Drain ?

OPPO RENO4 PRO use 4000 mAh battery with fact charging 65W SuperVOOC 2.0 technology. Basically this battery is enough for make it work full one day. But some heavy users who use this phone for playing games or watching movie several hours continuously will need to do some adjustment to make battery work more longer. Please disable all not use connections like NFC or GPS or Bluetooth or Wifi and make LCD screen brightness as low as possible for battery power saving.