OOT is the highest authority. Let me give you an example. If you buy a mobile phone, you can only play some basic applications without ROOT permission. If you want to delete unnecessary system software on the mobile phone, such as the old version of UC that comes with the system, you can't delete it. In fact, all the functions on Android are realized by one software, such as SMS (mms.apk). If you have ROOT permission, you can kill it. Then your SMS function is gone. In order to ensure the normal use of these functions, the general official system is not ROOT, but some software is even ROOT. Like the root file manager, if you want to change the font of the system, the second screen animation, modify some system settings. Everyone needs roots, but you can't mess around.

Jailbreak refers to opening the user's operation authority, so that the user can erase the running state of any area at will. Only after the successful jailbreak, the file system of iphone (1) will be in a read-write (rw) state, and third-party programs and plug-ins without official certification can be installed and run. These softwares were either rejected by Apple Store for some reason (usually because they violated Apple's rules and regulations), or the developers didn't have a MAC system, or the authors refused to pay $65,438+000 to publish their works. After jailbreaking, you can use these softwares.

The biggest difference between iPhone's iOS and other mobile phone systems (such as Nokia's Symbian and Google's Android). ) that is, the latter two are open user rights, while the iOS user rights are extremely low. Simply put, the user rights of the latter two are RW (read and write), while the user rights of iOS are only R (read only). Therefore, users of iOS can only use Apple-verified applications (purchased in the Apple Store), and other behaviors cannot change the system.