Due to recent issues related to Google
Play, some players have been experiencing an error message (Error:
963 or 907, etc.) when trying to update Castle Clash. Please try
un-mounting your SD card and then download and install Castle Clash
from the following link: http://bit.ly/1Ro3I3P If un-mounting your
SD card does not resolve the issue, please uninstall updates for
Google Play Store via Settings on your device.