How to Update App to Android 9

[communicate2richi (Richi V)]

Cool Jetpack Pro

Gaming App

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play.google.com

Cool Jetpack PRO : Play Store

Cool Jetpack PRO is the New 3+ Game Arcade in Play Store for your Smartphone or Tablet! How to Play & Fly :- Once you downloaded the free android game app from google play store, to start just tap or double tap on your screen and your Cool Jetpack pro Jumps & lift-off's. Simply touch the screen again to ascend and release to descend. Dodge the flying angry birds . Grab the Powerful magnets to attract more coins. You fly towards higher and higher scores which also gives you Jetpack 3plus Joy.  ...

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I tried to update my update to android 9…but just getting blank flash screen ?
uploaded the apk in kodular … then made change to android version…got message to wait for 48 hrs…then i download the apk…but not working…?

Can anyone please help out…

Thanks!

[communicate2richi (Richi V)]

any one can please suggest… ?

thanks!