What is jail break?
my bad, ‘jailbreak’ one word
Many smartphone, tablet, and game console makers include a layer of Digital Rights Management (DRM) software on their products. This DRM exists either to limit the software you can run on it, or is there for security reasons. Jailbreaking is the process of hacking these devices to bypass DRM restrictions, allowing you to run “unauthorized” software and to make other tweaks to your operating system.