To understand the utility of GSMPlusVIP, one must understand the FRP architecture. When a Google account is added to an Android device, a specific token is stored in the /data/system partition. Upon a factory reset, the bootloader checks for this token. If present, the Setup Wizard demands authentication.
If the manual settings method fails, users often download specific APKs directly from the GSMPlusVIP site: gsmplusvip frp best