NSURL *url = [NSURL URLWithString:@"http://webservice.net2survey.com/servicejson.svc/basic"];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    [request  setHTTPMethod:@"POST"];
    [request setValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [request setValue:@"http://webservice.net2survey.com/servicejson.svc/basic" forHTTPHeaderField:@"SOAPAction"];

    NSString *soapMessage = [NSString stringWithFormat:
                             @"<SOAP-ENV:Envelope xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope\">"
                             "<ToPostalCode>734301</ToPostalCode>"
                             "<FromPostalCode>700001</FromPostalCode>"
                             "<Weight>Africa</Weight>"
                             "<DeliveryServiceName></DeliveryServiceName>"
                             "</SingaporePostalInfoDetailsRequest>"];

    NSString *messageLength = [NSString stringWithFormat:@"%d",[soapMessage length]];

    [request setValue:messageLength forHTTPHeaderField:@"Content-Length"];
    [request setHTTPBody:[soapMessage dataUsingEncoding:NSUTF8StringEncoding]];

    NSData *data= [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSString *responseStr=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

    NSLog(@"response string is %@",responseStr);