How to generate the 8660_msimage.mbn 8660_msimage.mbn is released in SW by default, actually, it includes the all the boot images and partition table there. MPRG8660.hex will download this image and reset to mass-storage mode. If customers have different HW settings, such as GPIO/DDR, the default 8660_msimage.mbn may not work for them, so customers need build their own 8660_msimage.mbn by themselves with following ways. 1. Have the QPST 2.7.366 or higher version installed. 2. Make a local folder, copy sbl1/sbl2/sbl3/rpm/tz images to this folder. 3. copy the emmcswdownload.exe from C:\Program Files\Qualcomm\QPST\bin to this folder. 4. Prepare the partition_boot.xml as below and copy the partition_boot.xml to the same folder as above. 5. Run the emmcswdownload.exe tool to create OEM boot image with a command below. emmcswdownload.exe -f 8660_msimage.mbn -x partition_boot.xml -s 1G -g 4M 6. The 8660_msimage.mbn will be generated in the folder.