Top questions to look at before re-asking them:
- How can I install the Google Apps Package (Play Store, …) on my Android device?
- How can I circumvent regional restrictions in Google's Play Store?
- How can I download an APK file from the Play Store?
- How to search the Play Store by permissions?
- How to change the account for Android Market?
- Can I use multiple Android devices with a single Google account?
- Can there be malicious apps on Google Play? (including: "What red flags should I look for")
- Android and antiviruses
- Google play fails to install application with RPC:S-5:AEC-0
- Can't I install or update Apps from Play Store: Error 905. How to fix?
- How do I fix “Unknown reason -110”?
- Server Error! Play Store failing
- Error 504 when downloading apps from Play Store?
- Sometimes Market update gets stuck downloading. How can I cancel?
- Market App Downloads always fails/never starts
- Google Play: Error downloading app - insufficient space
- Package Install via Market sometimes fails and gives seemingly random error message
For more, please see the most frequented questions.