Unknow Error, Failed to read flash.and Error: 0xef ReadInfo


hi…cs tool team…my phone have monkey virus infected….and itry to readflash,and remove malware virus in my new cstool dongle but nothing happen…my brand and model of my phone is…myphone a919i duo… please solved this kind of problem. thanks in advance…

Action : Remove Malware/Virus
Tips:
1.Remove Battery, Insert usb cable, Insert battery
2.power off Phone, Remove & Reinsert Battery , insert USB Cable
(In Case Some Phone Required to hold bootkey)
Waiting for Phone Usb…
Phone found [ USB Port:COM5 ]
Connecting…
Connection Done.
Read CPU Info…
CPU_ID: 6583
CPU_SW: 0001
CPU_HW: CA01
uploading boot image to RAM…
Handshake received from Phone.
Detected eMMC FlashType.
Warning: failed to init dram, loading default settings
Waiting for DRAM detection…
Done. Size=0x0000000000000000
Error: 0xef [ReadInfo].

Reading file system, pls wait …

Action completed
Time taken : 00:00:59
Reconnect Battery/USB Cable
CS-Tool Ver 1.38.15

Action : Read Flash
Tips:
1.Remove Battery, Insert usb cable, Insert battery
2.power off Phone, Remove & Reinsert Battery , insert USB Cable
(In Case Some Phone Required to hold bootkey)
Waiting for Phone Usb…
Phone found [ USB Port:COM5 ]
Connecting…
Connection Done.
Read CPU Info…
CPU_ID: 6583
CPU_SW: 0001
CPU_HW: CA01
uploading boot image to RAM…
Handshake received from Phone.
Detected eMMC FlashType.
Warning: failed to init dram, loading default settings
Waiting for DRAM detection…
Done. Size=0x0000000000000000
Error: 0xef [ReadInfo].

Dummping Flash Image Now…
Unknow Error, Failed to read flash.

Action completed
Time taken : 00:01:09
Reconnect Battery/USB Cable
CS-Tool Ver 1.38.15