[EDL] ERASE FRP Selected Model : Samsung Galaxy S21 Ultra 5G Code Name : SM-G998U Operation : Erase FRP [1] Authenticating... OK Retrieving data... OK [416,92 KiB] Initializing data... OK Waiting for HS-USB QDLoader 9008... COM28 Connecting to device... OK Writing flash programmer... FAIL [Sahara] Firehose verification failed! Trying to connect to FIREHOSE Mode! Connecting to flash programmer... FAIL Waiting for response timeout! UNLOCKTOOL 2023.12.25.0 Elapsed time : 13 seconds em làm lại nhiều lần vẩn lỗi vậy, nhờ mấy anh chỉ giúp em, big thanks ae trước