SYSTEM NOTICE: Just a heads up, we are doing routine system maintenance on the site. Uploads will be disabled during this time. The maintenance may take up to 24 hours. Thank you for your understanding and patience.
The mmcblk0.img is a file used to unbrick 816w (A5_DUG) which is bricked due to BL corruption and the phone stuck at emergency download mode (9008),
To use this file you'll need an 8GB SD Card (8GB as the phone's internal),
Then you should write this file to the SD Card using Win32DiskImager,
After that you'll put that SD Card into the phone and make sure the battery is charged well,
Now try to enter Fastboot mode by Vol- and Power,
Phone will enter Fastboot now, and you maybe able now to flash it with the Official Firmware,