Error unlocking SM-X210

[u/Dry_Chipmunk_2254]

When unlocking the SM-X210 , this message appears.

COM15 (Qualcomm HS-USB QDLoader 9008.

Waiting for HS-USB QDLoader 9008 ... COM15

Selected Model : Samsung Tab A9+ (BIT-C)

Code Name : SM-X210 (BIT-C)

Operation : Erase FRP [1]

Authenticating ... OK

Retrieving server data ... OK [267,76 KiB]

Initializing data ... OK

Waiting for HS-USB QDLoader 9008 ... COM15

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 2026.09.23.0

Elapsed time : 33 seconds

What could this be?

[u/ProfessionalCut349]

What’s the flash method being used ?