k790i no signal and bad audio after upgrade.the phone was having plain white lcd.after flashing with kulenkendi server it asked for the phone code i logged to reset phonecode now phone menu has come but it says no network and the audio is very much worst it sound like a torn speaker no voice no music.i changed the antenna set which includes the ringer.but no result.the one with the mobile is working fine with other mobile.is this software problem please help me.thanks.