I know this is an old device, I just got one, well a few of them so I had to tinker a bit.
it is a Qualcomm MDM9x07 device containing 15 basic partitions, nothing fancy here.


dev: size erasesize name
mtd0: 00140000 00020000 "sbl"
mtd1: 00140000 00020000 "mibib"
mtd2: 00c00000 00020000 "efs2"
mtd3 ...