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Unlock your HTC U21


 Specification HTC U21 
 Bypass FRP HTC U21 
 Root HTC U21 
 Firmware HTC U21 
 Developer Mode HTC U21 
 Bypass Lock Screen HTC U21 
 HTC U21 Factory Reset 
 Secret codes HTC U21 
 Screenshot HTC U21 

HTC U21


OS: Android v10 (Q)

CPU: Qualcomm SDM765 Snapdragon 765G (7 nm)
RAM: 8 GB
Display: 6.8 inches
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.
  • Press the Remove button in the menu that appears on the PC screen.
  • fter verifying the data, the removal of the smartphone screen lock will begin. Confirm the deletion, click OK.
  • Wait until the end of the operation, and put the 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.

  • Using the volume buttons to navigate through the menu, select Recovery and confirm by pressing the power button.
  • Select Wipe data/factory reset. by using the volume up/down buttons to move through the menu and confirm the selection by pressing the power button.
  • Confirm the hard reset and reboot the phone.


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 you and open a menu with power settings, that is, the lock will be removed.
  • You need to quickly find the page with security settings in the 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 Aroma File Manager to your phone's memory card. Insert a memory card into your smartphone.
  • Put your smartphone into recovery mode using the button combinations that are suitable for your particular model.
  • In recovery mode, find the item Install zip. Then go to 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)
  • Reboot your device.


5. Restore access to your smartphone using your Google Account.
  • When you try to unlock the phone several times, Forgot password? will appear on the screen. Click on it.
  • Choose to regain access by entering your Google Account login 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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