If you'd like to make sure you get the right file, let me know:

Go to Settings > Apps > Google Play Store > Storage > Clear Cache.

Because you aren't downloading this from the store itself, you need to tell your phone to trust the file. Go to . Tap on Security (or Lock Screen and Security). Find Unknown Sources and toggle the switch to On . 2. Find the Right Version

Ensure you have at least 500MB of free internal space for the installation to "set" properly. Is it Safe?