(adsbygoogle = window.adsbygoogle || []).push({}); 1.go to setting then security
2.scroll down to unknown sources and click it
3. go to this link You must login or register to view this content.
4. click the middle download button (it should say download and is the smallest of them all)
5. one ad will pop up exit out of that then a file should be downloaded called com.dotgears.flappybird apk
6. accept and install then you should have it