[Q] Trying to flash official stock rom for my T999 samsung galaxy S3 ? please help ?

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http://forum.xda-developers.com – I am trying to flash stock rom for my samsung galaxy S3 T999 with T mobile. I bought it from someone it had cynagog mod in it. I am not sure what exactly is it. So i am trying to bring it to original state by adding official stock rom for Tmobile from this link http://www.sammobile.com/firmware/?p...ype=1#firmware These are the steps i followed please let me know if i am missing some thing or doing something wrong 1) downloaded md5 file from this link and unzip it 2) put my s3 in download mode my pressing volume down, home button and power button together 3) start odin and attac (HowTos)