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Unlock your DEXP Z355


 Specification DEXP Z355 
 Hard reset DEXP Z355 
 Root DEXP Z355 
 Firmware DEXP Z355 
 Developer Mode DEXP Z355 
 Bypass Lock Screen DEXP Z355 
 DEXP Z355 Factory Reset 
 Secret codes DEXP Z355 
 Screenshot DEXP Z355 

DEXP Z355


OS: Android 8.1 Oreo

CPU: ARM Cortex-A53, 1300 MHz, Cores: 4
RAM: 2 GB, 667 MHz
Display: 5.5 inches
Camera: 7.99 MP (megapixels)
Battery: 2600 mAh, Li-Polymer


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.
  • Press the Remove button in the menu that appears on the PC screen.
  • The program will warn you about deleting all data from the smartphone, to continue working, click OK.
  • 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)
  • 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 up/down 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.
  • 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 left, the phone will report 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.
  • You need to turn off the phone and prepare a memory card.
  • Transfer the Aroma File Manager program using a computer 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, 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 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.
  • 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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