What happened with System.ServiceModel in Windows Phone 8?

Question

I'm working on cross-platform application for all mobile and desktop platforms. It's all in C#. I'm working in Visual Studio using Xamarin. It's a client-server app, so I use WCF.

Inspired by Miguel Castro: Extreme WCF I divided my solution into WinForms client, Proxy, Contracts, Services and Console server host. But projects like Proxy or Contracts must be created as PCL (Portable Class Library) and here is my problem - I can't use System.ServiceModel in PCL with Windows 10 or Windows Phone. What's going on? Why?

What's the best walkaround?

EDIT: I guess there is no problem with Windows Universal 10, only with Windows Phone 8. When I check Windows 10, it automatically check back to Windows 8. VS says: The following will be automatically targeted because the support the same set of portable APIs: Windows 8

EDIT2: To be even more clear, I'm struggling implementing this (below) in Portable Class Libiray with checked Windows Phone 8:

using System.ServiceModel;

namespace Contracts
{
    [ServiceContract]
    public interface IMyService
    {
        [OperationContract]
        int GetSomething();
    }
}

Answer 1

Take a look here for references on which APIs are supported on the Universal Windows Platform.

You can consume WCF services from Windows Phone 8 (as detailed here) but I am not able to find any documentation that supports hosting WCF services from Windows Phone 8.