Okay, so when it comes to the iPhone standard, there is no .NET support…so this means no networking support, right? Or is there a work-around?
No, there is no support and no workaround.
With iPhone Basic you have the WWW class for HTTP POST requests, but thats all networking you have in the basic version. If you want full socket support, you must buy iPhone Advanced
Be careful with terminology please. 
(a) It’s Unity iPhone Basic, not Standard.
(b) It’s not that there is no “.NET support”, it’s that you must be using Advanced to utilize .NET sockets in particular. Saying “.NET” is very broad, yet it’s really .NET sockets that you’re discussing.