To restore the Google Play Store again
- You go in your Android phone in the "settings" to the "security"Option.
- Under "device administration" check "Unknown sources" in order to temporarily the Installation of Non-Market to allow Apps.
- Download the installation file of the Google Play store to download.
- Connect your Smartphone to the PC and save the installation file to a folder on your Android Smartphone.
- Open the file, e.g. the ES-file-Explorer. Click in the ES file Explorer on the .apk file and follow the installation process of the Google Play store.
- Finally, you should disable the Option "Unknown sources" again.

Allow unknown sources
In a further practical tip, you will learn how you incompatible Apps on your Android device and install.
