The method of using ADB to delete PIN or pattern lock files was primarily effective on older Android versions. As Android evolved, security was significantly bolstered, especially from Android 5.0 Lollipop onward, with the introduction of features like Factory Reset Protection (FRP). This means the ability to bypass the lock screen using ADB methods has become progressively more challenging with newer versions.
Here's a general breakdown:
Android 4.4 KitKat and Older:
These versions are more vulnerable to the ADB method. Most devices running on Android 4.4 KitKat and older can have their PIN or pattern files deleted using ADB, provided USB Debugging is enabled.
Android 5.0 Lollipop to 6.0 Marshmallow:
The introduction of Factory Reset Protection (FRP) in Android 5.0 made devices more secure. While the ADB method might still work on some devices, it's less reliable due to enhanced security measures. Moreover, after resetting the device, you would need the previously synced Google account credentials to set up and access the device, thanks to FRP.
Android 7.0 Nougat to 9.0 Pie:
Security was tightened even more during these versions. The ADB method is largely ineffective on devices with these Android versions. Additional encryption layers and security patches were consistently rolled out, further closing vulnerabilities.
Android 10 and Newer:
The ADB method is almost certainly ineffective from Android 10 onward. The platform's security features, such as improved biometrics, scoped storage, and further encryption enhancements, make bypassing the lock screen using conventional methods, like ADB, highly unlikely.
Keep in mind that these are general observations based on the core Android OS. Manufacturers sometimes apply their own security measures or modifications, which can influence the effectiveness of methods like ADB bypasses.
Always remember that attempting to bypass security features can result in data loss or compromise device functionality. It's crucial to proceed with caution and ideally seek professional help if unsure.