what is Rooting
Rooting is the process of allowing users of smartphones, tablets and other devices running the Android mobile operating system to attainprivileged control (known as root access) over various Android subsystems. As Android uses the Linux kernel, rooting an Android device gives similar access to administrative (superuser) permissions as on Linux or any other Unix-like operating system such as FreeBSD or OS X.
How to root your Android device
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