When port scanning my iPhone I get an RST, ACK from 'Spytechphone' over port 8192, does anyone know what this port does? I can't find any useful information.
Port 8192 is one of many ports that is used for TCP/UDP. After a little bit of searching it appears that this is a port that, like #INV3NT3D said in his comment, is used by SpyTech Phone Service, among a few others.
I think a better question you need to be asking is:
"This seems like unusual traffic on my phone. Who is SpyTech Phone Service and why are they accessing my phone?"
Hope this helps.
The name of the registrant may be unrelated here. I'm not an iOS user, but isn't there a netstat app in the store you can use to dump the listeners to get some more information?
Port 8192 spytechphone is a multiplayer port used by PC games like GTA vice city multiplayer servers. I just opened that port yesterday for a server. Hope this answer helps you on the long run.