Cross Domain jQuery AJAX request to WCF - 405 Method not allowed - wcf

Question

I am building simple WCF web service for my mobile web app.
I am stack at the point of making the $.ajax request to WCF which comes back with 405 - Method not allow, even though when I do http://http://localhost:35798/RestServiceImpl.svc/json/23 I can see result of the ReturnJSONData() in the browser.
I went through 100's of different post, but none of the answer fixed my problem.
AJAX Request
$.ajax({
type: "GET",
url: "http://localhost:35798/RestServiceImpl.svc/json/34",
contentType: "application/json; charset=utf-8",
success: function(data) {
console.log(data);
},
});
IRestServiceImpl.cs
namespace RestService{
[ServiceContract]
public interface IRestServiceImpl
{
[OperationContract]
[WebInvoke(
Method = "GET",
ResponseFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped,
UriTemplate = "json/{id}"
)]
string ReturnJSONData(string id);
}
}
RestServiceImpl.svs.cs
namespace RestService {
public class RestServiceImpl : IRestServiceImpl {
public string ReturnJSONData(string id) {
return "You requested product " + id;
}
}
}
WebConfig
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
<system.serviceModel>
<services>
<service name="RestService.RestServiceImpl" behaviorConfiguration="ServiceBehaviour">
<endpoint address ="" binding="webHttpBinding" contract="RestService.IRestServiceImpl" behaviorConfiguration="web">
</endpoint>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="ServiceBehaviour">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp/>
</behavior>
</endpointBehaviors>
</behaviors>
<standardEndpoints>
<webHttpEndpoint>
<standardEndpoint name=""
helpEnabled="true"
automaticFormatSelectionEnabled="true"
defaultOutgoingResponseFormat ="Json"
crossDomainScriptAccessEnabled="true"/>
</webHttpEndpoint>
</standardEndpoints>
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>
Any suggestion much appreciated.