Please forgive the basic nature of this question. Android is based on Linux, and Linux is a multi-user OS. As I understand it, every version or distribution of Linux must have at least one admin account that provides file system root access and other heightened privileges. So my question is, if I buy an Android device directly from an OEM, and not through a service provider like AT&T, what happens to the account with admin rights? Do OEMs never provide the admin account credentials to consumers, or does it vary by OEM?
I'm trying to understand issue. If I'm buying a device outright, shouldn't I have admin rights to it without having to "break-in" to my own device? It this a stated policy of the OS vendor (Google) that OEMs cannot give consumers admin rights? If not, why wouldn't they provide the admin account credential as a matter of course? Is there a safety issue or other technical issue that supports this apparent policy, or is it simply a business decision? Thanks for your insight.