How to Easily Master Format OPPO F9 (F9 PRO) with Safety Hard Reset?

Tips and tricks to fix OPPO F9 or OPPO F9 PRO problems. This is Android smartphone from Oppo which have 6.3 inches LCD screen width using LTPS IPS with 19.5:9 aspect ratio. The first operating system use Android Oreo 8.1. This phone powered by Mediatek MT6771 Helio P60 with Octa Core processor, enough to play 3D HD games without lag because it have dedicated GPU (graphic processor unit) Mali-G72 MP3. Oppo have their own user interface, OPPO F9 (F9 PRO) use ColorOS version 5.2 user interface. Find more review and information about how to solve troubles of OPPO F9 (F9 PRO) at community.

What is Advantage of OPPO F9 (F9 PRO) Specifications?

Network GSM 3G HSDPA or with 4G LTE Dual simcard
LCD 6.3 inches 19.5:9 aspect ratio
Processor Octa-core 2.0 GHz Cortex-A73 & 2.0 GHz Cortex-A53
GPU Mali-G72 MP3
Bluetooth / GPS / Wifi
Memory Internal 64 GB with 4 GB or 6 GB RAM
External memory 256 GB microSD with own slot
Main Camera 16 MP f/1.8 + 2 MP f/2.4, autofocus, LED flash
Front Camera 25 MP for video conference and selfie photography
Operating System Android Oreo 8.1
Battery Li-Ion 3500 mAh

How to Fix or Problem Solving for Recovery OPPO F9 (F9 PRO) hang or not responding or malfunctions or stuck or freezing or bricked ?

Some users need to use Android smartphone for playing games or doing some office work or other usage. But we need to download applications to support all works. OPPO F9 (F9 PRO) have big internal memory as 64 GB. If we need more storage, then we still can add additional external memory MicroSD maximum 256 GB. Install all applications at internal memory will have many advantages for st abilities or faster speed. We can install many applications from Google Play Store like Snapchat, Skype, Whatsapp, WeChat, Line Messenger, Facebook, Instagram, Viber, Telegram, Blackberry Messenger (BBM). Please understand that we also have to read user review when we want to install new or not famous applications, because some of them may contain viruses or malware that can make our OPPO F9 (F9 PRO) become crash or hang or stuck or bricks or LCD touch screen not responding or not responsive. Usually they are not verified by Play Protect information when we want on the process of download.

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 F9 (F9 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 F9 (F9 PRO) ?

Big internal memory and big 4 GB RAM or 6 GB RAM will make OPPO F9 (F9 PRO) users can run more applications for multitasking. But sometime installed apps can be crash and make some problems such as hang or LCD touch screen not responsive with our finger hand. We need to do soft reset or reboot to remove temporary files and caches. Please press and hold POWER button until OPPO F9 (F9 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 F9 (F9 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 F9 (F9 PRO) ?

We can use microSD external card to copy or move important files using File Manager applications. If our OPPO F9 (F9 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.

#Option 1, Hard Reset OPPO F9 (F9 PRO) with software menu

  1. Turn on the OPPO F9 (F9 PRO)
  2. Make sure the battery is not empty
  3. Backup important data at OPPO F9 (F9 PRO) 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 F9 (F9 PRO) will do the master reset process.

hard reset oppo f9 / f9 pro

#Option 2, Hard Reset OPPO F9 (F9 PRO) Factory Default using Hardware Secret Button Key

If we can not go to menu, or OPPO F9 (F9 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 F9 (F9 PRO)
  2. Make sure the battery OPPO F9 (F9 PRO) 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 F9 (F9 PRO) will continue master reset, wait for several minutes until OPPO F9 (F9 PRO) start like new again.

How to Unlock or Fix or Bypass or Solutions for OPPO F9 (F9 PRO) forgot password code or security lock screen pattern or pin (lost password)?

After use several month, OPPO F9 (F9 PRO) will have many private pictures because this phone have good selfie camera as 25 megapixel and good dual rear camera with 16 mp + 2 mp for deep of field or bokeh effect. We do not want unauthorized people can access our confidential important data. We have to activate security protections. OPPO F9 (F9 PRO) already have fingerprint sensor, it will ask to scan our fingerprint to activate this security protections. OPPO F9 (F9 PRO) will also ask for alternative protections like screen lock pattern or password pin protections. This is important when we can not use fingerprint or use gloves for daily activity. The problems will start happen when we can not unlock this phone or fingerprint can not unlock. What should we do?

Don’t worry because we can unlock or bypass forgotten screen lock pattern or password pin protections at OPPO F9 (F9 PRO) use registered Google account. Please follow steps for hard reset or master format using hardware button combination key above. Previous Google account is very important because it can use to make sure this phone is belong to us after force from Hard Reset or Master Format to Factory Default. New Oppo smartphone already use latest Android version which already implement FRP (Factory Reset Protection). FRP is important to secure our phone when it is stolen or lost. Android will ask for previous same Google account username and password after finish performing hard reset or master format. Therefore we have to remember carefully our Google / Gmail username and password. We also recommended to activate or create OPPO ACCOUNT at OPPO F9 (F9 PRO), because it can help us to bypass forgotten security protections.

Is That Any Secret Code for Doing Format OPPO F9 (F9 PRO) ?

There is no secret hidden code for OPPO F9 (F9 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 F9 (F9 PRO) ?

There are two phone memory type at OPPO F9 (F9 PRO), one is internal memory and the other one is external memory. If we want to format internal memory phone then we have to do hard reset or reformat the operating system of OPPO F9 (F9 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 F9 (F9 PRO) Stronger, Life Longer and Not Fast to Drain ?

As 6.3 inches LCD screen smartphone, OPPO F9 (F9 PRO) will need big battery to support work full one day. This phone already have enough battery capacity 3500 mAh. However, some heavy users maybe need to have more bigger battery for playing games or watch movie several hours. But we have to know that OPPO F9 (F9 PRO) battery is not removable, therefore we can not replace OPPO F9 (F9 PRO) battery with bigger one. We have to do some adjustment like make LCD screen brightness as low as possible, and also disable all not use connections like GPS or Bluetooth or Wifi. Some users need to know our locations like main camera apps, then please activate GPS battery saving mode.


  • How To Force Hard Reset OPPO F9 Without Password ?

    To secure our data, we usually give security protections or password to protect our important data. But when some trouble happen, we should do hard reset or master format. But the problems appear when our OPPO F9 (F9 PRO) ask for password before hard reset or reformat. Do not worry, because we can easily hard reset OPPO F9 without password by using hardware button combination key like steps at #option 2 above. Because the process will start the procedure when OPPO F9 (F9 PRO) at OFF positions, therefore we do not need to give any answer of password protections to force hard reset. But for security reasons, we have to declare that this phone is really belong to us by login with previous Google username and password account after finish hard reset.

  • How To Wipe Password / Remove Password From OPPO F9 (Remove Pattern)?

    Although using protection is important at this phone, but many users does not know how to remove password protections or screen lock pattern protections at OPPO F9 (F9 PRO). First we have to know that removing password protections using normal procedure will need to know the password answer first, otherwise we can not remove or erase or wipe OPPO F9 (F9 PRO) password. If we know the password then we can use menu Setting > Security and follow the steps to remove. However, if we forgot the answer, then we have to bypass OPPO F9 (F9 PRO) using Gmail account or using reformat with hardware button combination steps like what we already wrote above.

  • How To Remove Google Account From OPPO F9 ?

    When we activate this phone, we have to add Google account or some other account. How about to remove the account ? We can remove Google account from OPPO F9 without doing reformat or hard reset. please remove Google account from menu Setting > Account and choose Google or other account to remove. But if our OPPO F9 (F9 PRO) will be use by other people, than we suggest to do hard reset or master format whether using menu Setting like steps at #option 1 or using hardware button combination key like steps at #option 2 above.

  • How to Switch OFF OPPO F9 (F9 PRO) ?

    Please press and hold POWER button until menu appear and choose pop up POWER OFF menu, then press that OFF menu, wait several second until OPPO F9 (F9 PRO) totally OFF.

2 thoughts on “How to Easily Master Format OPPO F9 (F9 PRO) with Safety Hard Reset?”

  1. My oppo f9 is stuck on logo and hard reset is not working, whenever I try the power+down botton it just goes back to the logo again. How to fix this?

    • Hi, usually after performing hard reset with hardware button combination key, your Oppo F9 operating system will reformat to factory default. IF the boot loop or stuck at logo happen because software or OS troubles, then that phone will work again after finish hard reset. But if the problem still happen, then maybe there are some other hardware troubles. Please consult with Oppo authorized service center.


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