Some older apps specifically require this version of the account manager to authenticate correctly on Marshmallow-based hardware. Google Account Manager 6.0.1 - APKMirror

If viewed strictly as a software component:

There are three primary scenarios where downloading this specific version is necessary:

Google Account Manager is a system app that helps Android devices handle Google account authentication and sign‑in flows. Different Android versions use different Account Manager builds (e.g., 4.x for KitKat, 5.x for Lollipop, 6.x for Marshmallow). Mismatched or missing versions can block sign‑ins, especially after flashing custom ROMs or wiping data.

: Users often download the APK file from third-party sites like to install it on a locked device. Safety Note

It allows your device to securely communicate with Google to manage account data. FRP Bypass: