Post

...
http = (HttpConnection)Connector.open(url);
			os = http.openOutputStream();
            
            //tipo de pedido
            http.setRequestMethod(HttpConnection.POST);
            
            //Envia informacoes de cabecalho, exigido no POST
            http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            
            //Envia dados.
            byte data[] = "nome=thiago".getBytes();
            os.write(data);
            
            data = "&idade=21".getBytes();
            os.write(data);
            os.flush();
...