How to unlock android phone without passcode

Using ADB (Android Debug Bridge) to unlock Android phone without the passcode is a technical method that may work only if certain conditions are met, such as USB debugging being enabled on the device beforehand. Here's an overview:

Prerequisites:

USB debugging must be enabled on the device before it was locked.
The device must be connected to a computer via USB.
You need to have ADB installed on your computer.

Limitations:

If USB debugging is not enabled, this method will not work.
It requires the device to be connected and recognized by your computer.

General steps to unlock Android phone without the passcode:

1. Connect your device to your computer via USB.
2. Open a command prompt or terminal window.
3. Enter adb devices to ensure your device is detected.
4. Use ADB commands to remove or reset the lock screen, such as:

adb shell rm /data/system/gesture.key

or

adb shell rm /data/system/password.key

5. Reboot your device:

adb reboot

6. The device may now be unlocked, but this method may not work on all devices, especially newer ones with security enhancements.