4.1 - Kingroot

: Rooting can trigger a factory reset or "brick" the device if the exploit fails.

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In some cases (especially on Samsung devices), Kingroot 4.1 will ask permission to reboot halfway through. Allow it. After reboot, the app automatically resumes. kingroot 4.1

While modern versions of Android (version 6.0 and above) have largely patched the vulnerabilities used by KingRoot, version 4.1 was specifically optimized for devices running Android 4.2.2 through Android 5.1. Key Features of Version 4.1 : Rooting can trigger a factory reset or