You can easily check the server monitor. If an error occurs on the server you're managing, you can easily see from the terminal Android. Restriction: - You're using your ISP or Telecommunications Carrier, because the port is not allowed to connect, you may be able to connect to arbitrary ports. - That security software is installed on Android devices If you could not connect. - The configuration changes that you are using your ISP or Telecommunications Carrier, you may be able to connect to the port. Restriction of Free version: The connecting server is to three.