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Unlock your TCL 40L


 Specification TCL 40L 
 Root TCL 40L 
 Firmware TCL 40L 
 Developer Mode TCL 40L 
 Bypass Lock Screen TCL 40L 
 TCL 40L Factory Reset 
 Secret codes TCL 40L 
 Screenshot TCL 40L 

TCL 40L


OS: Android v13

CPU: Qualcomm Snapdragon 662
RAM: 6 GB
Display: 6.67 inches
Camera: 48 MP 8 MP 2 MP 2 MP
Battery: 5000 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 and launch Tenorshare 4uKey for Android.
  • A menu will open on the PC screen, press Remove.
  • The program will warn you about deleting all data from the smartphone, to continue working, click OK.
  • After finishing the lock removal process, put your phone into recovery mode.
  • Click the Next button and follow the instructions on the screen. After starting 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 using volume buttons to navigate through the menu and confirm 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.
  • Finally, confirm the reset operation.


3. How to use a low battery to unlock a phone locked with a graphic key.
  • You need to make sure that the battery of the phone is discharged.
  • When the battery has a few percent charge left, the phone will notify about this and open the 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.
  • Turn off your phone and prepare a memory card.
  • Copy the Aroma File Manager program to the phone's memory card. Insert a memory card into your smartphone.
  • Using a combination of buttons, put your smartphone into recovery mode.
  • In recovery mode, select the option Install zip -> Install zip from sdcard -> Choose zip from sdcard, go to the archive folder with this program and select it.
  • You need to find the /data/system folder and delete the files 'gesture.key' and 'password.key' (if you have Android 4.4 or lower) or 'getekeeper.password.key' and 'getekeeper. pattern.key' (if you have 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.
  • You will need to enter your Google Account username and password.
  • Delete in the lock screen 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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