OTG cable for an FRP locked phone(USB-C or micro USB).
USB cable(USB-C or micro USB) for not locked SAMSUNG device.
Removing Google Account on the phone will erase all of your data.
All described operations are done at your own risk.
If you want to saves your data do a backup before you start.
The battery should be at least 50% charged before the start.
Removing Google Account Verification from SAMSUNG Galaxy Quantum 2
To begin turn on the SAMSUNG Galaxy Quantum 2 and connect to WiFi network.