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Unlock your LYF C451


 Specification LYF C451 
 Hard reset LYF C451 
 Root LYF C451 
 Firmware LYF C451 
 Developer Mode LYF C451 
 Bypass Lock Screen LYF C451 
 LYF C451 Factory Reset 
 Secret codes LYF C451 
 Screenshot LYF C451 

LYF C451


OS: Android OS, v6.0.1 (Marshmallow)

CPU: Octa Core, 1.3 GHz
RAM: 1GB
Display: 4.5 inches
Camera: 5MP Primary Camera
Battery: 2800 mAh


1. Use the Tenorshare 4uKey for Android app.
2. Make a hard reset (factory reset).
3. How to use a low battery to unlock a phone locked with a graphic key.
4. Delete 'gesture.key' and 'password.key' using Aroma File Manager.
5. Restore access to your smartphone using your Google Account.

1. Use the Tenorshare 4uKey for Android app.
  • Connect your phone to PC with USB cable and launch Tenorshare 4uKey for Android.
  • In the menu that appears on the PC screen, click Remove.
  • The program will warn you about deleting all data from the smartphone, to continue working, click OK.
  • After the process of removing the lock is completed, put the phone into recovery mode according to the prompts on the computer screen.
  • Click the Next button, then follow the steps recommended by the program to restore the device to factory settings and reboot it. After rebooting the smartphone, the screen lock will be disabled.


2. Make a hard reset (factory reset)
  • To get started, turn off your smartphone.Simultaneously press and hold for about 10-15 seconds one of the button combinations:
    Volume down button + Power button;
    Volume up button + Power button;
    Volume down button + Power button + Home button;
    Volume down button + Volume up button + Power button.

  • Select Recovery by using the volume buttons to move through the menu and confirm the selection by pressing the power button.
  • Select Wipe data/factory reset. using volume buttons to navigate through the menu and confirm selection by pressing the power button.
  • Confirm the hard reset operation.


3. How to use a low battery to unlock a phone locked with a graphic key.
  • You need to wait until the battery of the phone is discharged.
  • When the battery has a few percent left, the phone will report this and open a menu with power settings, that is, it will unlock the phone.
  • You need to quickly go to the security menu and disable the lock.


4. Delete 'gesture.key' and 'password.key' using Aroma File Manager.
  • You need to turn off the phone and prepare a memory card.
  • Copy the Aroma File Manager program to the phone's memory card. Insert the memory card back into the phone.
  • Using a combination of buttons, put your smartphone into recovery mode.
  • In recovery mode, follow the path Install zip -> Install zip from sdcard -> Choose zip from sdcard, go to the archive folder with this program and select it.
  • After starting the program, you will need to go to the folder /data/system and delete the files 'gesture.key' and 'password.key' (for Android 4.4 or lower) or 'getekeeper.password.key' and 'getekeeper.pattern.key' (for Android 5 or higher)
  • Restart your smartphone. The screen lock will be released.


5. Restore access to your smartphone using your Google Account.
  • After several unsuccessful ways to unlock the phone, Forgot password? will appear on the screen. Click on it.
  • Choose the option - recovery with a Google account. You will need to enter your Google Account username and password.
  • Remove the screen lock from the settings.



Thomas Nilan
Smartphone Expert
Thomas Nilan is a mobile phone expert with in-depth knowledge of the Android and iOS operating systems, who understands the settings of various hidden features that allow you to expand the capabilities of your smartphone, as well as get information about what is going on inside the phone for future repairs. He is an authority in his field, which has allowed him to become a ghostwriter for several technology publications, and he enjoys writing small mobile applications for testing smartphones.



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