Yep putting in 44 (no plus), worked for me just fine and got my whats app username and password.

I did try to wireshark the whatsapp traffic to no avail. FYI I used hostap (linux app) to setup my laptop as a wireless hotspot and connect the android phone to it.

Didn't pick up any traffic though for some reason - didn't spend much time on it though.

How are you looking at whatsapp traffic?

EDIT::: Just seen I only need a router to sniff traffic.