Setting up the Rummy APK. You might need to turn on the "install apps from unknown sources" feature in your device's settings before proceeding with the installation. This step is crucial slots bitcoinbecause it enables apps that you haven't downloaded from the official app store to run on your device. After the download is finished, find the downloaded APK file in the file manager on your device, tap on it to start the installation process. Introduction to Rummy. The Rummy game will be at your fingertips in a matter of seconds if you follow the on-screen instructions.