Version 3.3.1 was particularly notable for its high success rate on older ARMv7 devices. During its lifecycle, it was one of the few tools capable of bypassing the security layers of manufacturers like Samsung and Sony, which were beginning to implement more robust bootloader protections. It effectively "democratized" rooting, making it available to millions of users in emerging markets who used budget-friendly devices with limited official support. The Security and Privacy Trade-off
KingRoot 3.3.1 is a version of the KingRoot family of Android rooting tools—an app designed to obtain root (superuser) access on a wide range of Android devices without requiring a PC. It packages exploit routines, device-specific scripts, and an automated workflow that attempts to elevate privileges and install a persistent su binary and a root-management interface. Kingroot 3.3.1
This version will not work on Android 7.0 Nougat or later due to SELinux enforcements. Version 3