How to Easily Master Format OPPO A12 with Safety Hard Reset?

Tips and tricks to fix OPPO A12 (CPH2083 / CPH2077) problems. This is non 5G smartphone, but we can get 4G LTE data broadband with dual simcard slot nano-sim. When the first time release in the market, OPPO A12 use Android Pie 9.0 as factory default operating system together with Oppo user interface ColorOS 6.1. The full screen 6.22 inches HD resolutions 720 x 1520 pixels is use at front body with notch drop for 5 megapixel front camera.

OPPO A12 use 64 bit Mediatek processor MT6765 Helio P35 which have dedicated GPU (Graphic Processor Unit) PowerVR GE8320. Some users get issue with their OPPO A12 software or hardware. We will try to give more information about how to solve troubles of OPPO A12 (CPH2083 / CPH2077) at community.

What is Advantage of OPPO A12 Specifications?

  • Network GSM 3G HSDPA or 4G LTE with Dual simcard slot
  • LCD 6.22 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 with 3 GB RAM
  • Memory Internal 64 GB with 4 GB RAM
  • 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

Solutions To Fix Camera Issues On OPPO A12

How to Fix or Problem Solving for Recovery OPPO A12 hang or not responding or malfunctions or stuck or freezing or bricked ?

OPPO A12 is cheap smartphone with Mediatek MT6765 Helio P35 processor and have two options of internal memory, start from 32 GB with 3 GB RAM and more expensive one use 64 GB internal storage with 4 GB RAM. We can install many applications from Google Play Store. If we want to have more storage, then we can extend with external memory MicroSD.

We suggest to install only important and famous applications like WeChat, Skype, Facebook, Instagram, Kakaotalk, Whatsapp, Telegram and something like that, because some not famous or new apps usually may contain viruses or malware that can make our OPPO A12 (CPH2083 / CPH2077) become 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. Please read several user reviews before install that kind of apps.

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 A12. We are not recommended to install APK from unknown resource for safety reasons.

Solutions To Fix Slowly Performance Issues On OPPO A12

How to Force Shutdown or Force Soft Reset or Reboot or Restart OPPO A12 ?

This phone have standard RAM, but installed apps may crash or corrupt that can make troubles at OPPO A12 like 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 A12 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 A12 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 A12 ?

Please use MicroSD to backup all important data inside this phone. We have to choose important data using Android File Manager, then copy that folders and paste to External memory MicroSD.

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 A12 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 / Chat / Photos / Contacts on OPPO A12

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 A12 with software menu

  1. Turn on the OPPO A12
  2. Make sure the battery is not empty
  3. Backup important data at OPPO A12 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 A12 will do the master reset process.

hard reset oppo a12

#Option 2, Hard Reset OPPO A12 Factory Default using Hardware Secret Button Key

If we can not go to menu, or OPPO A12 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 A12
  2. Make sure the battery OPPO A12 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 A12 will continue master reset, wait for several minutes until OPPO A12 start like new again.

How to Unlock or Fix or Bypass or Solutions for OPPO A12 forgot password code or security lock screen pattern or pin (lost password)?

This phone have fingerprint sensor at back side of body. The fingerprint will ask to activate when the first time turn on and open from the box. We should secure all important data inside OPPO A12 from unauthorized users, especially when OPPO A12 lost or stolen or away from us.

After register fingerprint protection, we need to choose secondary protections like screen lock pattern or password pin protection for backup. 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 A12 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 toVerify 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 A12, 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 A12 ?

There is no secret hidden code for OPPO A12 to make it back to factory default. Do the options above to hard reset it.

How to Format or Erase Phone Memory at OPPO A12 ?

If we want to format internal memory phone then we have to do hard reset or reformat the operating system of OPPO A12 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 A12 Stronger, Life Longer and Not Fast to Drain ?

OPPO A12 (CPH2083 / CPH2077) use 4250 mAh non removable battery. This phone does not have fast charging technology. If we want to make OPPO A12 battery work more longer, then please do some adjustment like make LCD screen brightnees as low as possible and disable all not use connections like GPS or Bluetooth or Wifi. Because OPPO A12 sell with cheap price, then NFC data connections is not available.

More FAQ About OPPO A12 (CPH2083 / CPH2077):

  • How to do OPPO A12 Hard Reset Without Password?Security protection is very important to apply at OPPO A12. This phone does not have fingerprint, but we can choose screen lock pattern or password pin protections to make all data secure from unauthorized people. Some users get troubles with OPPO A12 always ask password when we want to do hard reset or master format. What should we do? Please follow steps to hard reset using hardware button combination key like steps at #option 2 above, because it will not ask any security password because the process start from OFF position. Therefore after pressing the combination key, then it will go directly to recovery options menu. It will bypass any screen lock or password protections at OPPO A12.
  • How to bypass face unlock security protections at OPPO A12?Face Unlock can be activate at this phone to protect using front selfie camera. We have to register our face several time to make it recognize to unlock. But the secondary protections will be ask for backup, we can choose screen lock pattern or password pin protection. This backup protection can be use when OPPO A12 Face Unlock can not work or need to bypass. If we Face Unlock can not open and we also forget about other security protections, then please use Google account to bypass by giving several time wrong answer continuously until freezing 30 seconds, then press Forgot Password / Pattern button, then we can type our Gmail username and password. If all steps still can not work, then please do hard reset using hardware button combination key like steps at #option 2 above.
  • How to wipe OPPO A12 Data and Password? First wipe data mean that we will erase all data, we can do this process by doing hard reset to reformat OPPO A12 operating system to factory default, after that our OPPO A12 will refresh like new again. We have to login with Google account to make it work with Google Play Store. Please note, doing reformat will also wipe all security protections or password or also Google account or any other account.
  • When I want to wipe / erase / remove all data from OPPO A12, it always ask password ?This phone will have many importnt data and private photo videos. We have to erase all data when we want to give OPPO A12 to other people. But why OPPO A12 keep ask password protections when we follow Setting menu to wipe data. Please follow steps at #option 2 above to reformat OPPO A12 operating system to factory default using hardware button combination key. It will not ask any security protections answer because first step is start from OFF state.
  • How to Fix OPPO A12 Forgot Passcode Or Unlock OPPO A12 Passcode ?The Passcode is same meaning with Password or PIN that we have chosen when activate security protections. This passcode will protect all important data from unauthorized people. If we can not unlock OPPO A12 passcode then we have to bypass using Google account like information above or hard reset if we can not access Google account.
  • What is Default OPPO A12 Passcode ? OPPO A12 does not have default Passcode.

Leave a Comment