Description about rooting Android

Rooting lets all user-installed applications run
privileged commands typically unavailable to
the devices in the stock configuration. Rooting
is required for more advanced and potentially
dangerous operations including modifying or
deleting system files, removing carrier- or
manufacturer-installed applications, and low-
level access to the hardware itself (rebooting,
controlling status lights, or recalibrating touch
inputs.) A typical rooting installation also
installs the Superuser application, which
supervises applications that are granted root
or superuser rights. A secondary operation,
unlocking the device's bootloader verification,
is required to remove or replace the installed
operating system. In contrast to iOS
jailbreaking , rooting is not needed to run
applications distributed outside of the Google
Play Store, sometimes called sideloading . The
Android OS supports this feature natively in
two ways: through the "Unknown sources"
option in the Settings menu and through the
Android Debug Bridge . However some
carriers , like AT&T , prevent the installation of
applications not on the Store in firmware , [5]
although several devices (including the
Samsung Infuse 4G ) are not subject to this
rule, [6] and AT&T has since lifted the
restriction on several older devices. [7] As of
2012 the Amazon Kindle Fire defaults to the
Amazon Appstore instead of Google Play ,
though like most other Android devices,
Kindle Fire allows sideloading of applications
from unknown sources, [8] and the "easy
installer" application on the Amazon Appstore
makes this easy. Other vendors of Android
devices may look to other sources in the
future. Access to alternate apps may require
rooting but rooting is not always necessary.
Rooting an Android phone lets the owner
modify or delete the system files, which in
turn lets them perform various tweaks and
use apps that require root access