Starting from April 4th, the Redmi team will stop providing updates to the developer ROM for Redmi released in 2016, including: Redmi 3S/3X, Redmi Note 3 SE, Redmi Pro, Redmi 4 series, Redmi Note 4, Redmi 4A.The normal upgrade for other devices will not be affected for the time being. If there are any changes for other devices, we will keep users informed.
Notice regarding Developer ROM for Redmi devices
https://in.c.mi.com/thread-1816813-1-0.html