Last night on one of the chinese microblogging site a user leaks the news about Millet Note that they will officially rollout Android 6.0 for Millet Note. The source also confirmed that this will be the MIUI 7 developer edition update.
It got confirmed when the user share the screenshot. This Android 6.0 update will be released for MRA58K version. This update will remove battery issues and stability issue. This update will be released for rest of the Millet Note device sooner after the Spring fest in 2016.
There is no confirmation about the update on rest of the countries, but it is expected to be released soon in other countries too.