I am using Indian ver. of A780. While I am through with call, sometimes it so heppens at the screen to blank. WHen I close the flap, it behas as normal, but on openingthe flap agsin, the touchscreen does not respond .The Home button at bottom of phone work, but the touch screen does not.

FOrmware on my phone is
R52_G_0D.50.AEP.BP:D39.B1PFlex:
GCOA780000SA061 DSP:62252500