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guys how do i add dvd movies to xperia u ??is there any app that can play avi file
sony people pls respond to this ??
Use MX Player..
I tried to edit config file for buil-in video player, but after adding there .AVI support it's still not playing AVI files. As Ryden said, use MX Player 
you can use formatfactory on your PC (its free) and change it to any format that you want
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unrelated topic, if you have some time please check this thread