E' stata rilasciata solamente per alcuni dispositivi, e tra questi non figura il Redmi Note 3 Pro Qualcom.
MIUI 8 Global Beta ROM 6.7.5 Released: Full Changelog & Download Links - MIUI General - Xiaomi MIUI Official ForumMIUI 8 global beta ROM for the following devices will be released progressively in the near future: Mi 2/2S, Mi 3, Mi 4, Mi 4i, Mi 5, Mi Note, Redmi 1S, Redmi 2 Prime, Redmi Note 2, Redmi Note 3 Qualcomm. Please stay tuned!