CN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US Google Account Manager 8.9.10 APK is not a consumer app—it’s a silent workhorse that enables seamless Google authentication on Android. For 99% of users, you should never need to manually install it; Google Play Services handles updates automatically.
Also verify the certificate fingerprint: google account manager 8.9 10 apk
adb install -r com.google.android.gsf.login_8.9.10.apk Note: This only works if the existing version is from the same signing key. Most stock ROMs block this. CN=Android, OU=Android, O=Google Inc