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 www.hard-reset.org 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. 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 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 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 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?

 

Do not worry about this trouble, because Android already give solutions when we forgot security screen lock pattern or password pin protections using Google account to unlock it. Please turn on this phone, when it ask for security answer, then please try to give several time wrong answer continuously until OPPO F9 (F9 PRO) locked or freezing about 30 seconds. At this situations we can find Forgot Password / Pattern button. Press this button, to give our Gmail username and password account that we have already signed-in before. If we still can not access Gmail account, then we have to do hard reset using hardware button combination key above.

 

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.