It's pretty straight forward. There are some you tube videos, it would be good to watch. The glass sits inside the chrome trim, that's not real easy to see in the videos or instructions. Don't over heat it, that will mess up the digitizer. I replaced the glass on my wife's S3.
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XX ~ Stay thirsty my friends ~ XX
Galaxy S4 - Current
Galaxy S3 - R.I.P.
EVO 3D - Stand by
EVO 4g - Stand by
Hero - Retired
HTC Vogue - Retired