The creator of Flappy Birds have called it quits and the game is no longer available on iOS AppStore and Android Google Play. If you’re using an Android device, there’s still hope thanks to a couple of users that have kept the original APK file prior of its demise on Google Play.
To install an APK file, just download it through desktop or directly to your mobile phone. Before installing, you would need to enable “Unknown Sources” under Security Settings, to allow installation of apps outside of Google Play.
Note: These are not official sources and please proceed at your own risk. At least this beats paying a premium for a Flappy Bird pre-installed device.