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Unlock your BenQ T55


 Specification BenQ T55 
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BenQ T55


OS: Android 5.1 Lollipop

CPU: MediaTek MT6735, Processor clock: 1.30 GHz, Number of cores: 4, GPU: ARM Mali-T720 MP2 @600 MHz
RAM: 1 GB, 2 GB
Display: Color / IPS TFT, 16M colors, 720 x 1280 px (5.50") 267 ppi, ~71.5% screen-to-body ratio
Camera: 13 Mpx
Battery: Li-Ion 2900 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.
  • First, connect your phone to PC and launch 4uKey for Android.
  • A menu will open on the PC screen, press Remove.
  • Smartphone screen lock removal will start.
  • Wait until the lock is removed, and then put your smartphone 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)
  • First, turn off your phone.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.
  • Using the volume up/down buttons to navigate through the menu, select Wipe data/factory reset. and press the power button.
  • Confirm the reset.


3. How to use a low battery to unlock a phone locked with a graphic key.
  • You need to wait for the battery to drain.
  • 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 open the menu with security settings and turn off the phone lock.


4. Delete 'gesture.key' and 'password.key' using Aroma File Manager.
  • You need to turn off the phone and remove the memory card from it.
  • Copy the Aroma File Manager program to the phone's memory card. Insert a memory card into your smartphone.
  • Using the combination of volume and power buttons, put the 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.
  • 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 block will be removed.


5. Restore access to your smartphone using your Google Account.
  • After unsuccessful attempts to unlock the phone, Forgot password? will appear on the phone screen. Click on it.
  • 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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