You need Board Firmware flash tool!
IMAGE Download Software - IDT_V2.0.0.9 -
DOWNLOAD
You have to open Phone, Connect the Test Point! And flash with this tool.
HAVE SAME ERROR WIH SAME MODEL
how did u manage to fix it
usb1:Load DownLoadBoot Version 2.0.0.9
usb1:Opening COM2 Success
usb1:download mode enter:31
usb1:Downloading xloader begin.
usb1:Writing xloader...
usb1:Write delay = 3000 ms.
usb1:Download xloader end.
usb1:download mode enter:0
usb1:Downloading uce begin.
usb1:Writing uce...
usb1:Write delay = 3000 ms.
usb1:Download uce end.
usb1:download mode enter:0
usb1:Downloading fastboot begin.
usb1:Writing fastboot...
usb1:Write delay = 3000 ms.
usb1:Download fastboot end.
usb1:VCom download successfully.
then nothing happend (no fastboot device)