How to Easily Master format OPPO A11 with Safety Hard Reset?

Tips and tricks to fix OPPO A11 problems. Cheap mid end smartphone with 6.5 inches LCD screen, using HD resolutions at 720 x 1600 pixels. This phone use full screen smartphone and having small notch drop for 8 megapixel front selfie camera. OPPO A11 is powered by Qualcomm SDM665 Snapdragon 665 with dedicated GPU graphic processor unit Adreno 610. Android Pie version 9.0 is available by default at OPPO A11 together with ColorOS 6.0 Oppo user interface. OPPO A11 have 2 models code with PCHM10 or PCHT10. Find more review and information about how to solve troubles of OPPO A11 (PCHM10 / PCHT10) at community.

What is Advantage of OPPO A11 Specifications?

Network GSM 3G HSDPA or with 4G LTE Dual simcard
LCD 6.5 inches 20:9 aspect ratio
Processor Octa-core 4 x 2.0 GHz Kryo 260 Gold & 4 x 1.8 GHz Kryo 260 Silver
Bluetooth / GPS / Wifi
Memory Internal 64 GB or 128 GB with 4 GB RAM
Memory Internal 128 GB or 256 GB with 6 GB RAM
GPU Adreno 610
Main Camera Quad 12 MP f/1.8 + 8 MP f/2.3 + 2 MP f/2.4 + 2 MP f/2.4
Main Camera Features autofocus, LED flash
Front Camera 8 MP for video conference and selfie photography
Operating System Android Pie 9.0
Battery Li-Po 5000 mAh

How to Fix or Problem Solving for Recovery OPPO A11 hang or not responding or malfunctions or stuck or freezing or bricked ?

The internal memory is important to keep all installed data. RAM is important for multitasking applications. We can choose the best combination between RAM and internal storage when buy OPPO A11 (PCHM10 / PCHT10). Cheaper price have 64 GB storage and 4 GB RAM. Actually 4 GB RAM has been enough, but of course having more bigger RAM will give better multitasking experience. If we want to add more storage, then please use microSD external card that use deciated slot, therefore we still can use dual network provider although we use external mircoSD.

We can install many applications from Google Play Store like Facebook, WeChat, Instagram, Whatsapp and some other more. But some new or not famous apps may contain viruses or malware that can make troubles at our OPPO A11 like hang or stuck or broken or frozen or LCD touch screen not responsive. We have to read as many user reviews as possible. 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 A11. 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 A11 ?

Some installed applications can be crash or corrupt that can make our OPPO A11 (PCHM10 / PCHT10) 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 A11 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 A11 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 A11 ?

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.

If our OPPO A11 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 A11 with software menu

  1. Turn on the OPPO A11
  2. Make sure the battery is not empty
  3. Backup important data at OPPO A11 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 A11 will do the master reset process.

hard reset oppo a11

#Option 2, Hard Reset OPPO A11 Factory Default using Hardware Secret Button Key

If we can not go to menu, or OPPO A11 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 A11
  2. Make sure the battery OPPO A11 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 A11 will continue master reset, wait for several minutes until OPPO A11 start like new again.

How to Unlock or Fix or Bypass or Solutions for OPPO A11 forgot password code or security lock screen pattern or pin (lost password)?

Although the price of OPPO A11 (PCHM10 / PCHT10) is not expensive, but we still can get quad camera at back side of body. The camera have 12 megapixel for standard wide + 8 megapixel for ultrawide + 2 megapixel for macro + 2 megapixel for Depth of Field or BOKEH. We will have many private photos and videos after use OPPO A11 several months. Please secure all data at OPPO A11 (PCHM10 / PCHT10) when our phone away from us or lost or stolen. Fingerprint will suggest to activate when the first time setup this phone. We can choose face unlock detection options. We have to activate secondary security protections like screen lock pattern or password pin protections. The problems will start happen when we can not unlock this phone or fingerprint can not work for unlock. What should we do?

Don’t worry because we can unlock or bypass forgotten screen lock pattern or password pin protections at OPPO A11 use registered Google account. Previous Google account is very important because it can use to make this phone work after force from Hard Reset or Master Format to Factory Default.

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 for previous pin. 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. We also recommended to activate or create OPPO ACCOUNT at OPPO A11, 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 A11 ?

There is no secret hidden code for OPPO A11 to make it back to factory default. Do the options above to hard reset it.

How to Format or Erase Phone Memory at OPPO A11 ?

If we want to format internal memory phone then we have to do hard reset or reformat the operating system of OPPO A11 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 A11 Stronger, Life Longer and Not Fast to Drain ?

This phone have big non removable battery at 5000 mAh. It can work full one day or more. But we have to know that many heavy users will use their phone continuously several hours for watch movie or playing games. The battery of OPPO A11 (PCHM10 / PCHT10) will not enough. We have to so some adjustment to make OPPO A11 battery work more longer. Please make LCD screen brightness as low as possible. Please disable all not use connections like GPS or Bluetooth or Wifi. OPPO A11 (PCHM10 / PCHT10) does not have NFC sensor.

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