Tips and tricks to fix OPPO A12S problems. This phone still use Android Pie 9.0 when the first time release in the market and hope to get Android 10.0 soon. ColorOS 6.1 is the bundling user interface together with Android Pie. It work with Mediatek MT6765 Helio P35 processor and dedicated GPU (graphic processor unit) PowerVR GE8320 for support playing games with less lag.

OPPO A12S comes with full screen 6.2 inches HD resolution at 720 x 1520 pixels. At the top of the screen, we will see small notch drop for 5 megapixel front camera. At back body, we can find dual horizontal camera. Some users get issue when using OPPO A12S software and hardware. Therefore, we will try to give more solutions, reviews and information about how to solve OPPO A12S troubles at community.



What is Advantage of OPPO A12S Specifications?


  • Network GSM 3G HSDPA or 4G LTE with Dual simcard slot
  • LCD 6.2 inches 19:9 aspect ratio
  • Processor Octa-core 4×2.35 GHz Cortex-A53 & 4×1.8 GHz Cortex-A53
  • Bluetooth / GPS / Wifi
  • Memory Internal 32 GB
  • RAM 3 GB
  • GPU PowerVR GE8320
  • Main Camera Dual 13 MP f/2.2 + 2 MP f/2.4
  • Main Camera Features autofocus, LED flash
  • Front Camera 5 MP for video conference and selfie photography
  • Operating System Android Pie 9.0
  • Battery Li-Po 4230 mAh


How to Fix or Problem Solving for Recovery OPPO A12S hang or not responding or malfunctions or stuck or freezing or bricked ?

OPPO A12S is entry level smartphone with standard internal memory size as 32 GB. We can not install too many applications easily, because the storage will get insufficient after use several months. Therefore we need too choose very important apps from Google Play Store for daily activity.

Please do not install new or not famous apps before read many user reviews, because some of them may contain viruses or malware that can make our OPPO A12S get troubles such as 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 / icon.

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 A12S. We are not recommended to install APK from unknown resource for safety reasons.


Easy Solutions To Fix Lagging Slowly Issues On OPPO A12S


How to Force Shutdown or Force Soft Reset or Reboot or Restart OPPO A12S ?


OPPO A12S standard 3 GB RAM, it still can work for some multitasking apps. Sometime installed applications may crash or corrupt. Our OPPO A12S 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 A12S 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 A12S 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 A12S ?

We can use external memory MicroSD to backup all important data inside internal memory to external 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 A12S 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 / Photos On OPPO A12S


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 A12S with software menu

  1. Turn on the OPPO A12S
  2. Make sure the battery is not empty
  3. Backup important data at OPPO A12S 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 A12S will do the master reset process.


hard reset oppo a12s

#Option 2, Hard Reset OPPO A12S Factory Default using Hardware Secret Button Key

If we can not go to menu, or OPPO A12S 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 A12S
  2. Make sure the battery OPPO A12S 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 A12S will continue master reset, wait for several minutes until OPPO A12S start like new again.


How to Unlock or Fix or Bypass or Solutions for OPPO A12S forgot password code or security lock screen pattern or pin (lost password)?

This phone have dual camera for daily activity with 13 megapixel + 2 megapixel. We will have many private photos videos and important data after several period of time. Please secure all confidential data from unauthorized people, especially when OPPO A12S away from us or lost or stolen.

First protection that suggested to use is fingerprint, because it is easy and fast to access. After register our fingerprint, OPPO A12S will ask to activate secondary protections such as screen lock pattern or password or pin for backup. Because fingerprint will not work after this phone reboot or restart. 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 A12S 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 A12S, 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 A12S ?

There is no secret hidden code for OPPO A12S to make it back to factory default. Do the options above to hard reset it.


How to Format or Erase Phone Memory at OPPO A12S ?

If we want to format internal memory phone then we have to do hard reset or reformat the operating system of OPPO A12S 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 A12S Stronger, Life Longer and Not Fast to Drain ?

OPPO A12S battery is 4230 mAh capacity. It is not removable battery. Many users can use this phone full one day without need to recharge. If we are use this phone very active for many social media group chat or playing games several hours continuously, then the battery will not enough. We need to do some adjustment to make OPPO A12S battery work more longer by make LCD screen brightness not too bright and disable all not use connections like GPS or Bluetooth or Wifi. OPPO A12S does not have NFC.

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