My Mi4 was bought from honorbuy.com and the "about phone" says:
Model number: Mi 4LTE-CE
Android version: 4.4.4 KTU84P
MIUI version MIUI 7 by xiaomi.eu 5.12.11 | Beta
I understand that a recent update merged the two partitions in readiness for Android 6? I'm not getting any updates currently...