First go to More>>Auto forward>>Remote control log in and input password and set Remote control recipient's phone. And send code by the instruction. After this phone receive the code you can enable Use instruction to control app. After that you can use the controling phone to compose a message in a specific format and send to this phone, then the app will automatically forward the message from your phone to any number using the controling phone. For details info please refer to the following video.
