[T-Mobile, Samsung Galaxy SIII] maradamc:
I did some digging and found I need to pull data from:

/sdcard/callrecorder/

/storage/emulated/0/sounds/

I'm trying to decipher if I need to dump any additional partitions. No luck finding much useful information on S3 partitions - this was the closest I found - http://xdaforums.com/galaxy-s3/general/galaxy-s-iii-partition-layout-basic-efs-t1689623

In ADB, I retrieved the following, but none of them obviously map to sdcard or storage/emulated.

ls -l /dev/block/platform/*/by-name/

lrwxrwxrwx root root 1969-12-31 22:16 aboot -> /dev/block/mmcblk0p5

lrwxrwxrwx root root 1969-12-31 22:16 backup -> /dev/block/mmcblk0p20

lrwxrwxrwx root root 1969-12-31 22:16 boot -> /dev/block/mmcblk0p7

lrwxrwxrwx root root 1969-12-31 22:16 cache -> /dev/block/mmcblk0p17

lrwxrwxrwx root root 1969-12-31 22:16 efs -> /dev/block/mmcblk0p11

lrwxrwxrwx root root 1969-12-31 22:16 fota -> /dev/block/mmcblk0p19

lrwxrwxrwx root root 1969-12-31 22:16 fsg -> /dev/block/mmcblk0p21

lrwxrwxrwx root root 1969-12-31 22:16 grow -> /dev/block/mmcblk0p23

lrwxrwxrwx root root 1969-12-31 22:16 modem -> /dev/block/mmcblk0p1

lrwxrwxrwx root root 1969-12-31 22:16 modemst1 -> /dev/block/mmcblk0p12

lrwxrwxrwx root root 1969-12-31 22:16 modemst2 -> /dev/block/mmcblk0p13

lrwxrwxrwx root root 1969-12-31 22:16 pad -> /dev/block/mmcblk0p9

lrwxrwxrwx root root 1969-12-31 22:16 param -> /dev/block/mmcblk0p10

lrwxrwxrwx root root 1969-12-31 22:16 persist -> /dev/block/mmcblk0p16

lrwxrwxrwx root root 1969-12-31 22:16 recovery -> /dev/block/mmcblk0p18

lrwxrwxrwx root root 1969-12-31 22:16 rpm -> /dev/block/mmcblk0p6

lrwxrwxrwx root root 1969-12-31 22:16 sbl1 -> /dev/block/mmcblk0p2

lrwxrwxrwx root root 1969-12-31 22:16 sbl2 -> /dev/block/mmcblk0p3

lrwxrwxrwx root root 1969-12-31 22:16 sbl3 -> /dev/block/mmcblk0p4

lrwxrwxrwx root root 1969-12-31 22:16 ssd -> /dev/block/mmcblk0p22

lrwxrwxrwx root root 1969-12-31 22:16 system -> /dev/block/mmcblk0p14

lrwxrwxrwx root root 1969-12-31 22:16 tz -> /dev/block/mmcblk0p8

lrwxrwxrwx root root 1969-12-31 22:16 userdata -> /dev/block/mmcblk0p15

root@android:/ # mount

mount

rootfs / rootfs ro,relatime 0 0

tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0

devpts /dev/pts devpts rw,relatime,mode=600 0 0

proc /proc proc rw,relatime 0 0

sysfs /sys sysfs rw,relatime 0 0

none /acct cgroup rw,relatime,cpuacct 0 0

tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0

tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0

none /dev/cpuctl cgroup rw,relatime,cpu 0 0

/dev/block/platform/msm_sdcc.1/by-name/system /system ext4 ro,relatime,user_xattr,barrier=1,data=ordered 0 0

/dev/block/platform/msm_sdcc.1/by-name/userdata /data ext4 rw,nosuid,nodev,relatime,user_xattr,barrier=1,journal_async_commit,data=ordered,noauto_da_alloc,discard 0 0

/dev/block/platform/msm_sdcc.1/by-name/cache /cache ext4 rw,nosuid,nodev,relatime,user_xattr,barrier=1,data=ordered 0 0

/dev/block/platform/msm_sdcc.1/by-name/persist /persist ext4 rw,nosuid,nodev,relatime,user_xattr,barrier=1,data=ordered 0 0

/dev/block/platform/msm_sdcc.1/by-name/modem /firmware vfat ro,relatime,gid=1000,fmask=0006,dmask=0006,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0

/dev/block/platform/msm_sdcc.1/by-name/efs /efs ext4 rw,nosuid,nodev,relatime,user_xattr,barrier=1,data=ordered 0 0

/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0

/dev/fuse /storage/sdcard0 fuse rw,nosuid,nodev,noexec,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

Additionally, the DD for userdata is 12GB while the whole device is 16GB... still trying to figure out how to capture the remaining 4GB. And to complicate things, I've gotten data recovery software to recognize the image dump and scan it, but the files I want have uncommon file extensions (*.m4a, *.3ga) or no extensions at all. <sigh>... it's gonna be a long week...