Check the file size; a standard GAM file is usually very small (a few megabytes). If the file is unusually large, it likely contains malware.
: Installing an incorrect version of a system component can lead to "bootloops" or constant application crashes. Conclusion android 8-9-10 gam.apk
Tap Install and wait for the system to replace or update the existing account manager stub. Check the file size; a standard GAM file
: Handling your username and password when you sign in. Check the file size