I found that it is uploading my docs , zip files, .jpg files to web server.Not only this , it is extracting all the mails and its attachment from my email boxes (particularly Gmail and my company).
Earlier when of my friend disclosed it to me , then I put a setup and found that indeed it is stealing all the attachment from all the mail boxes.
I put pen drive in OTG, my MI3 secretly copied all the data and uploaded to Chinese web-server.
I found this alarming and to double check the status I re-downloaded the MIUI ver 6 form original site. and still it is the same .As on today I can say it is secretly uploading my data in encrypted format.
Even after blocking everything from "Security App"( A firewall app), Mi3 still uploads documents in background.
You all are requested to view and alert all developer to check the matter more deeply.
And send a alert to all users