Unknown error code during application install: "920" while installing Google Keyboard Unknown error code during application install: "920" while installing Google Keyboard on Android ver. 4.0.4
Possible solutions:


Clear the cache several times. Settings &gt; Apps &gt; All &gt; Google Play Store: Force Stop, Clear Data, Clear Cache
Re-add Google account.  Settings &gt; Accounts &gt; Google &gt; Click on your Gmail email address &gt; Remove account. Then, add it again.
Restart Wi-Fi connection. Turn off Wi-Fi on your phone, and reconnect.


Sources: 


Could not be downloaded due to an error (920)
Android Fix for error 920 or App could not be downloaded due to an error 920