Xiaomi is about to begin rolling out MIUI 8 alpha/experimental ROM.
MIUI ROM has three variant named beta, developer, and stable ROM. MIUI Alpha/Experimental ROMS are the very early builds and the most unstable version but with latest features.
Eligible devices for China Alpha/Experimental ROM:
First batch devices support MIUI 8 China Alpha ROM are Mi 3 / Mi 4 / Mi Note. More device will be added soon.
Eligible devices for Global Alpha/Experimental ROM:
First batch devices support MIUI Global Alpha ROM are Mi 2 / Mi 2S / Mi 3 / Mi 4 / Mi 5 / Mi Note. More device will be added to the list soon.
How to Apply:
You need to be an active Mi forum user to test the china and global alpha ROM. Senior forum users will get preference on China Alpha ROM meanwhile all forum users will get Global Alpha ROM. Apply from the below link to be enlisted.
Application Procedure for China Alpha ROM: Apply Here