https://wccftech.com/xiaomi-drops-miui-updates-six-phones/

After updating most of its devices with dated hardware with fresh software, Xiaomi has finally dropped the mic and announced that it is suspending six of its popular smartphones from getting any further software updates. The six Mi devices that have suffered the fate are the Mi 2/2S, Mi 4i, Redmi Note 4G, Redmi 2, Redmi 2 Prime, and the Mi Note. This means that the MIUI 9 Global ROM is their last stable update from Xiaomi.

Xiaomi took to the forum for announcing its latest move and also mentioned that the old devices will not even get any closed beta and public beta versions after November 17. The MIUI Global Beta ROM 7.11 has surfaced as the last beta version for all those six Mi devices. Xiaomi, however, is set to roll out MIUI 9 Global Stable ROM for these phones. The devices will be getting an OTA starting this December.