mt6739 only dump bootrom but not Protection disabled

[ghost]

I'm testing this tool on MT6739 but I receive only dump bootrom

[2021-09-27 20:19:23.926875] Waiting for device
[2021-09-27 20:19:33.989230] Found device = 0e8d:2000

[2021-09-27 20:19:34.057909] Device hw code: 0x699
[2021-09-27 20:19:34.057999] Device hw sub code: 0x8a00
[2021-09-27 20:19:34.058033] Device hw version: 0xcb00
[2021-09-27 20:19:34.058060] Device sw version: 0x2
[2021-09-27 20:19:34.058088] Device secure boot: True
[2021-09-27 20:19:34.058115] Device serial link authorization: False
[2021-09-27 20:19:34.058141] Device download agent authorization: False

[2021-09-27 20:19:34.058176] Found device in preloader mode, trying to crash...

[2021-09-27 20:19:34.059344] status is 7024

[2021-09-27 20:19:36.032828] Waiting for device
[2021-09-27 20:19:36.033289] Found device = 0e8d:0003

[2021-09-27 20:19:36.100812] Device hw code: 0x699
[2021-09-27 20:19:36.100911] Device hw sub code: 0x8a00
[2021-09-27 20:19:36.100948] Device hw version: 0xcb00
[2021-09-27 20:19:36.100978] Device sw version: 0x2
[2021-09-27 20:19:36.101016] Device secure boot: True
[2021-09-27 20:19:36.101046] Device serial link authorization: False
[2021-09-27 20:19:36.101081] Device download agent authorization: False

[2021-09-27 20:19:36.101116] Disabling watchdog timer
[2021-09-27 20:19:36.101762] Insecure device, sending payload using send_da
[2021-09-27 20:19:36.148062] Found send_dword, dumping bootrom to bootrom_699.bin

I tried to force but doesn't work, flash_tool got error

Connecting to BROM...
Connect BROM failed: STATUS_ERR(-1073676287)
Disconnect!
BROM Exception! ( ERROR : STATUS_ERR (-1073676287) , MSP ERROE CODE : 0x00. 

[chaosmaster]

The device is already insecure, there is no need for bypass

[chaosmaster]

There should be no need for a custom DA, since your device is insecure. Make sure to use the proper scattter file and preloader for your device.