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Similarly, the ability to sideload applications is typically permissible on Android devices without root permissions. Many vendors such as HTC, Sony, OnePlus, Asus, Xiaomi and Google explicitly provide the ability to unlock devices, and even replace the operating system entirely. However, these are different concepts: Jailbreaking is the bypass of several types of Apple prohibitions for the end user, including modifying the operating system (enforced by a "locked bootloader"), installing non-officially approved (not available on the App Store) applications via sideloading, and granting the user elevated administration-level privileges (rooting). Root access is sometimes compared to jailbreaking devices running the Apple iOS operating system.
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On some devices, rooting can also facilitate the complete removal and replacement of the device's operating system, usually with a more recent release of its current operating system. Thus, rooting gives the ability (or permission) to alter or replace system applications and settings, run specialized applications ("apps") that require administrator-level permissions or perform other operations that are otherwise inaccessible to a normal Android user. Rooting is often performed with the goal of overcoming limitations that carriers and hardware manufacturers put on some devices. Because Android is based on a modified version of 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 macOS. Rooting is the process by which users of Android devices can attain privileged control (known as root access) over various subsystems of the device, usually smartphones. Not to be confused with bootloader unlocking or SIM unlocking.
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