My version of busybox ( the one from the play store) doesn't output the type or label. Is yours a special build?
[email protected]:/ # busybox blkid --help
BusyBox v1.22.1-Stericson (2014-01-25 17:27:18 CET) multi-call binary.
Usage: blkid [BLOCKDEV]...
Print UUIDs of all filesystems...