Seemed kind of silly to me. The point of a casual pass phrase is that a non-operative should think nothing of it. So, you know she isn't your contact. You keep looking. To disappear makes no sense. It also makes no sense that there is no protocol if itdoesn't work. Or, maybe it made no sense for Auggie to say there is no protocol, because then he explained the protocol.
And the idea shouldn't have been to find a way out of the country as soon as possible, but to hide, in any of a million places, like some random unoccupied office, or store basement. Don't just stand on the street looking confused.
That phone display case made no sense and was much too convenient. Was it not really enclosed? Annie had zero trouble getting them to all sound. Why did they have batteries? And in a crowded train station, there must be lots of phones ringing. Why would Dani's be so noticible.
When they got to the cottage, that would be a perfect place to ambush the killer. Rather than hiding, Annie should have been prepared to catch him approaching.
And why would the Swedes have nixed a helicopter rescue?
It seems to me that driving out of town in a common car model on a main road would be the simple way to escape.