HI, I am using Modaco r12 version... and I have a problem when I try to make a call... as soon as I stick the phone to my ear... the screen goes black and I can not do anything i.e. disconnect the call... I have to wait until call is finished and someone disconnect himself... then screen comes back. Factory reset did not help. Does anyone know how to fix this? Or maybe three is better ROM to install that r12??