You are downloading the official, secure APK file for version
Google Sign-in: Google officially stopped supporting sign-ins for Android 2.3.7 and older in 2021. Download APK File -Android 2.3.3- v3.6.6-512
Settings > Applications > Unknown Sources and check the box. On some Gingerbread builds, it is under Settings > Security.In the case of Android 2.3.3 and version v3.6.6-512, it's essential to ensure that the APK file you download is compatible with your device and meets your needs. You are downloading the official, secure APK file