GSM-Forum - vivo y91 Unlock[Answered]

Hi team im trying to unlock vivo y91 show this error can u tell me what problem in there

Code:

    Disconnect Mobile...

    re-input Mobile Battery...

    then connect usb to computer....

    Make Sure your Mobie have power...

>>> Searching Mobile Com Port...

    Get Mobile Port:  COM4

>>> Driver Identifying name: 

    USB Serial Device

>>> ÊÖ»úÁ¬½ÓÕý³£...

    CPU_NAME: MT6765

>>> Reading Mobile Hardware info...Success

    HW_Inf:  8A00    SW_Inf:  CA00

>>> Initializing Mobile Phone...>>> Sending AUTH file...Success

>>> Downloading boot1 to Mobile...Success

    ÊÖ»ú×´Ì¬:SYNC...

    ÊÖ»ú×´Ì¬ÇÐ»»Îª :brom...³É¹¦

    È·ÈÏÊÖ»ú×´Ì¬Îª :brom...

    Initializationing BOOT2 ...

    =====================Flash ÀàÐÍ(eMMC)==============

    Flash Size: 0x0000000000000000 -> 0M

    Flash  ID: 0x0000000000000000

    Flash Name: UNKNOWN_UNKNOWN

    Flash Code: >>> switch hight speed re,wr port...

    Get Com Port is:  COM5

>>> Driver name: 

    MediaTek DA USB VCOM (Android)

>>> Reading Mobile GPT data...Fail

https://b.imge.to/2019/07/17/1URRq.png