Galaxy S6 :: Can Install Original Stock ROM?

I am using samsung s6 with mtk 6589 cpu. What i did is i wanted to root it but failed because odin cannot detect the phone.So,i hard reset the phone and reboot it.After reboot it, my imei is gone ,wifi mac address is gone, bluetooth address also gone.

And also, my phone doesn't show its model number it put there ''Android''. Before i hard reset it, the model number is SM-G9200.

What I am planning to do is downloading the stockrom from samMobile and flash it :/ i wonder if this will work since it is an MTK phone. Odin cant detect my phone.