How to Easily Master Format NOKIA C21 with Safety Hard Reset?

Tips and tricks to fix NOKIA C21 problems. We can not use 5G because this phone powered by Unisoc SC9863A that work with 4G for broadband Internet access. Because it use low end processor and limited RAM 2 GB or 3 GB, then it use Android 11 Go Editions. Find more review and information about how to solve troubles of NOKIA C21 at www.hard-reset.org community.

What are Advantages of NOKIA C21 Specifications & Features:

GSM 3G HSDPA & 4G LTE dual simcard
LCD 6.52 inches with 720 x 1600 pixels
Processor Octa-core 4×1.6 GHz Cortex-A55 & 4×1.2 GHz Cortex-A55
Internal memory 32 GB with 2 GB or 3 GB RAM
Internal memory 64 GB with 3 GB RAM
Main Camera 8 MP
Main Camera Features LED flash
Front Camera 5 MP for selfie photography and video conference
Operating system Android 11
Battery Li-Po 3000 mAh

How to Fix or Problem Solving for Recovery NOKIA C21 hang or not responding or malfunctions or stuck or freezing or bricked ?

Because it has limited processor, RAM and internal storage, then we suggest to install only important applications. We have to read many user reviews before download new or not famous apps, because sometime they may contain viruses or malware that can make troubles on our NOKIA C21 such as become slowly or hang or stuck or bricks or bootloop or frozen or LCD touch screen not responsive with our finger touch. Google will not give Verified by Play Protect icon for these kind of applications.

What should we do if this problem happen? First we have to try do soft reset or reboot or restart to remove temporary files or caches that can make some trouble at this phone. If our NOKIA C21 can boot again, then please try to download one good antivirus application from Google Play Store like AVAST or NORTON, please install only one antivirus. The antivirus will try to scan all installed applications and give recommendation setting for our phone.

If the problems still happen, then next step is doing hard reset or master format. Please note, doing hard reset will remove or erase all important data, therefore we have to backup all data first before doing master format. Doing hard reset will remove all Google account from NOKIA C21. For safety reasons, please do not install any unknown APK files, because they are very easy to make our phone getting trouble.

How to Force Shutdown or Force Soft Reset or Reboot or Restart NOKIA C21 ?

With 2 GB or 3 GB RAM, we suggest to install only important app. Because when it run with many apps, then sometime they may crash or corrupt that can make troubles at our NOKIA C21 or become stuck or LCD touch screen not responsive with our finger touch. We have to remove temporary files and caches to fix this troubles.

Please press and hold POWER button until NOKIA C21 shutdown or turn off by itself. After it 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.

How to backup data or Contact at NOKIA C21 ?

We can backup important data to external memory if we already insert external memory at MicroSD slot. We can transfer some files to external memory manually using File Manager inside this phone or we can download from Google Play Store.

If our NOKIA C21 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, How to Hard Reset NOKIA C21 with software menu:

Turn on this phone
Please Make sure NOKIA C21 (Android) battery already charge properly or minimum have 50% capacity
Go to menu: Setting > Backup & Reset > Factory data reset > Reset device
Choose Erase Everything
NOKIA C21 (Android) will do the process to Master Reset to Factory Default

#Option 2, How to Hard Reset NOKIA C21 with Hardware key button:

Turn off NOKIA C21
We have to connect power charger to our phone right now
Press and hold together : Power Button + Volume Up (about 10-20 seconds or more and the LCD while screen show Nokia Logo and command)
Release All button once we see Android Recovery with several menus at our phone
If we see the menu at LCD screen, choose Wipe Data/Factory Reset with Volume Button to select and use Power Button to ok or enter.
The NOKIA C21 will doing the process of restoring to factory default. And if we go back to Recovery menu, choose Reboot to start this phone from beginning.

How to Unlock or Fix or Bypass or Solutions for NOKIA C21 forgot password code or security lock screen pattern or pin (lost password)?

We can use fingerprint that located at back side body. We also can use 5 megapixel front camera for facial recognizing. We have to choose secondary protections, because after NOKIA C21 reboot or restart, the fingerprint or face detection will not work. However, problems will start happen when we can not unlock this phone or forgot protection password or pattern or pin or fingerprint can not work. 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. But because this Nokia phone already use latest Android version, then it have FRP (factory reset protections) to protect from stolen or lost. We have to hard reset our phone using hardware button combination key like steps at #option 2 above.

After finish reformat, NOKIA C21 screen will show Verify your account page to make sure this phone is belong to us. We need to sign in with previous Google Account that was previously synced on this device. Therefore we have to remember carefully our Google / Gmail username and password.

Is That Any Secret Code for Doing Format NOKIA C21 ?

There is no secret hidden code for NOKIA C21 to make it back to factory default. Do the options above for performing hard reset.

How to Format or Erase Phone Memory at NOKIA C21 ?

If we want to format internal memory phone then we have to do hard reset or reformat the operating system of NOKIA C21 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 NOKIA C21 (Android) Stronger, Life Longer and Not Fast to Drain ?

NOKIA C21 has limited battery capacity with 3000 mAh. Please do some adjustment to make this phone work more longer. We suggest to set the LCD screen brightness as low as possible and turn off all not use connections like GPS or Bluetooth or Wifi . NFC is not installed on NOKIA C21.