Samsung Galaxy S3

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http://forums.androidcentral.com – Hiiii... i have a Samsung galaxy S3. Last day it showed to update the software. While the updating was going on i accidentally touched the screen, and thereafter it started to display "Unfortunately, factory test has stopped". I did the factory test reset, but again after all the processes it shows the same complaint again. Also, i have to give an input on the screen more than once and after each time after touching the screen , it shows the same display regarding the factory test. If i tap OK only, it will show the next screen. And that takes a long time too... Can anyone sugges (HowTos)