sorry to reply on this TS first page post..

but, Mi3 ROM is given rooted by Miui.. just go to Miui site, download "developer rom", then click "security" app icon, enable root permission.. now you have root access.. you can try to install any app that require root access to test, also install supersu app from Play Store

This post has been edited by click2me: May 15 2014, 03:11 PM