xplay mate8 mtk 6580 imei rebuild failed-help me

Action : Android Repair IMEI(DownloadBoot Mode)
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:COM97 ]
Connection Done.
Read CPU Info…
CPU_ID: 6580
CPU_SW: 0000
uploading boot image to RAM…
Handshake received from Phone.
Detected eMMC FlashType.
Warning: failed to init dram, loading default settings
Waiting for DRAM detection…
New id found, testing…
ID: A80111303546484D42
Error: failed to init DRAM ?.
Error: 0xef [ReadInfo].

Action completed
Time taken : 00:00:28
Reconnect Battery/USB Cable
CS-Tool Ver 1.49

tried in miracle-infinity and volcano–all r can not

imei rebuild success-but still invalid imei

help me