Go to Settings > Security > Check "Unknown Sources."
If you own a flagship phone from 2023, you already have a much newer version (likely 13.x or 14.x) bundled with Google Play Services. You will never need to think about 6.0.1. google account manager 6.0 1
Allows users to add, remove, and manage several Google accounts on a single device, which is useful for separating personal and work data. Go to Settings > Security > Check "Unknown Sources
The "FRP bypass" method utilizing Google Account Manager 6.0.1 became a standard procedure for technicians and enthusiasts. The process typically involved accessing the device’s settings or browser through convoluted workarounds—often using accessibility features or keyboard glitches—to install the Account Manager APK. Once installed, the application allowed users to "Add Account" without verifying the previous owner’s credentials. It acted as a bridge, tricking the operating system into accepting a new Google account, effectively stripping the previous security layer and resetting the device to a usable state. The "FRP bypass" method utilizing Google Account Manager 6
Learn More About Google's Secure and Protected Accounts - Google