, if the phone is reset via hardware buttons (Recovery Mode) without first removing the Google account, the system triggers a lock that requires the original Google credentials to proceed. Why "Unlock Tools" Exist
Hardware-level UART/EDL (chip-level)
A grey hardware test menu with squares (Red, Green, Blue, Receiver, etc.) will appear. Keep the phone on this screen. Step 3: Execute the Bypass Connect your Samsung A20 to the PC using the USB cable. Open the SamFw Tool software on your computer. Samsung A20 Frp Unlock Tool