sniffing

I am trying to log the traffic that instagram send through their mobile applications. I am already tried fiddler2, charles and an android phone. I am trying use mitmproxy.org to android. but I have problem In-app I am getting a network error. Help me, pls

I know Instagram rate limits(sandbox mode) only coming to public api endpoint calls. But what about private one(genunie api). Sniffed mobile network but couldn't able to find any good result. Any help with good sources on this? (Especially on .NET)

I am running ettercap normally as root. And sometimes it crashed when I scan for hosts. Anybody has the same problem and did anybody fix it?