oppo a3s flashing error Scanning for Qualcomm HS-USB QDLoader 9008 device...
Download Port: Qualcomm HS-USB QDLoader 9008 (COM9)
USB Driver: [Qualcomm Incorporated] qcusbser, version: 2.1.2.7, date: 8-2-2017
Initializing...
MSM Serial number: 0x7dae9fb2
MSM HW ID: 0x0009a0e1
OEM Public Key Hash: 0x2440693284962ae0dc5f8534d2e131c3252c1c42f8e89019b9f1b4188731ca6f
SBL SW version: 1
Sending prog_emmc_firehose_8953_ddr.mbn, size: 432.29 KiB... Done.
Attempting to run firehose... Done.
Sending ping... ERROR: Failed to authenticate Digital Signature
Resetting validation state
ERROR: Failed to authenticate Digital Signature
Resetting validation state
failed