Obviamente, a resposta foi sim.
poderia ser alcançado usando um plugin especial:
Capture setup is possibly not ready for wifi/wlan capturing. Please read the wiki about capturing traffic in such an environment: http://wiki.wireshark.org/CaptureSetup/WLAN
I am NOT able to detect the VoIP call being made on these smartphones (using the smartphone app Viber).
well, even if see the wifi/wlan traffic of the phones, you may not be able to capture 'voip' calls made via viber.com. I don't know for sure, but I'm pretty confident, that they will use their own protocol and I hope they will use encryption, otherwise I would consider viber.com a security failure and not a service ;-). Unfortunately both issues (own protocol and encryption) will make it hard/impossible to extract any valuable information from the captured packets. Anyway, you will see how far you get, as soon as your wlan/wifi capture setup works.
HINT: wifi monitoring mode (see wiki) is not supported on Windows with WinPcap, so if you want to capture the wifi/wlan traffic of your android phones you either have to use a special adapter on Windows (AirPcap) or use Linux as the platform for Wireshark.
UPDATE
Please read the following paper regarding viber security. It explains some concepts (protocol,'encryption/scrambling', etc.)
https://www.os3.nl/2011-2012/students/jeffrey_bosma/courses/ssn/assignments/project
Além disso, havia muitos plugins espiões disponíveis para detectar ele , Além de acima, dê uma olhada aqui tutorial detalhado como o administrador do sistema irá espiar u