https://www.sammobile.com/samsung/galaxy-a20/firmware/SM-A205F/TUR/download/A205FXXSABUB1/1520908/
https://www.sammobile.com/samsung/galaxy-a20/firmware/SM-A205F/TUR/download/A205FXXU7BTD3/347086/
Şu ikisini deneyebilirsin olmazsa mecburen Android 11 ROM yüklemen gerekecek.