To prevent bad situations from happening, now activate USB Debugging on your device.
To enable USB Debugging on devices running Android 4.0 and above, go to Settings> Developer Options. Check the box USB Debugging.
For devices running an older version of Android, go to Settings> Applications> Development. Then also tick the USB Debugging box.
Your computer must be installed with ADB.
You will need a USB cable to connect your Android device to your computer.
- Make sure your phone / tablet battery must be over 75% or more to avoid power collapse during processing.
- Back up all personal data on your phone to avoid data loss (for example, contacts, SMS, MMS, Internet Settings, Wi-Fi passwords .).
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Start troubleshooting:
1. Connect your Android device and computer with a USB cable.
2. Open the command prompt window on the computer (for Windows operating system, the Command Prompt command-line interpreter application).
3. You begin to enter the following command line into the opened window.
Note: Press Enter after each line:
adb shell cd /data/data/com.android.providers.settings/databases sqlite3 settings.db update system set value = 0 where name = 'lock_pattern_autolock'; update system set value = 0 where name = 'lockscreen.lockedoutpermanently'; .quit exit adb reboot
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4. After the device restarts, continue to enter the following commands:
5. Your device will restart again. After it has finished booting, it will ask you to enter a string password model, which you can optionally enter any model you want and the device will be unlocked completely.
6. After regaining access to the device, if you are a forgetful person, it is best to set up a new string or numeric password and remember it in a notebook.
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If you apply the same steps as above, the success rate is very high while the risks that the device faces are extremely small. This will be a trick that you can take care of when you need it.