Have you ever wondered, what does your smartphone do, when you sleep and it lies beside the bed?
Well I did. So I have mapped the connections of one dummy android device as a security research.
This is just PoC, more detailed study is on the road map.
It seems that it is rather quite busy. Connecting to several well known installed app -related servers like google, maps and so on.
Usually connects using port TCP 443 and 80.