
You are now locked out. This is , a mandatory security feature introduced with Android 5.1 Lollipop. While FRP is excellent for deterring thieves, it is a nightmare for legitimate owners who forget their old credentials, buy a used phone from an uncooperative seller, or inherit a device from a family member.
Solution: On the locked phone, swipe down the notification bar. Change USB mode from “Charging” to “File Transfer” or “MTP”. If you cannot access the notification bar, you must use the Emergency Call code method first. Samsung A20 Frp Unlock Tool
Flash a "Combination ROM" (factory test firmware) that disables FRP, then flash back stock ROM. You are now locked out
ADB & Fastboot installed, Samsung driver. Samsung A20 Frp Unlock Tool