Error 920
issue:
You can not install any application
solution:
* Method 1
Disable your Wi few seconds and re-enable the connection again
* Method 2
Settings> Accounts> delete the Google account that is synchronized with Google Play
Reset the terminal and add new Google account from Settings> Accounts
You can also, if you prefer, create a new Google Account
* Method 3
Settings> Applications> Google playstore all, clean cache, data, uninstalling updates
Restart the terminal and reopen the playstore