Gave up after half an hour, partly because of the hopelessly nonsensical behaviour of the characters (why, when his ex wife turns up, does he not explain the situation and use her to get help? Why instead does he leave it so long that she enters the house and tries to make a call?), but also because to compensate for the poor writing and unrealistic behaviour of the characters the director chose to have such loud music playing over the phone calls that I couldn't hear a word that was being said. Didn't watch any more than that.
Review of Unknown Caller
