FRP removal usually requires a complex sequence of keyboard evasions or account logins. The 4.0.1.0 version automates this via a "Meta Mode" for MediaTek devices. It uses a bootrom exploit that forces the device into a pre-loader state, wiping the FRP partition directly.
Most unlock tools rely on a live server connection. When the server is down, you cannot unlock phones. Version 4.0.1.0 ships with a significant local database of unlock codes for older chipsets (MediaTek MT65xx/67xx, Spreadtrum, and some Qualcomm MSM89xx). For 2014–2018 Android devices, this tool can generate unlock codes without an internet connection. global unlocker tool 4.0.1.0