Xiaomi has released a new update MIUI 8 Global Beta ROM 7.7.20 for all the supported Xiaomi devices. The MIUI 8 Global Beta ROM 7.7.20 brings multiple improvements and new features in Lock screen, Status Bar and Notification Bar. You can also download MIUI 8 Global Beta ROM 7.7.20 for all these devices including Redmi 2, Redmi 2 Prime, Mi 3/Mi 4, Redmi Note 3 Qualcomm, Redmi Note 3 Special Edition, Redmi Note 4 MTK, Mi 4i, Redmi Note 2, Redmi Note 4G, Redmi Note Prime, Mi Max 32G, Mi Max 64G/128G, Mi 2/2S, Mi 5, Mi 5s Plus, Mi Note, Redmi 3/Prime, Redmi 3S/Prime, Redmi Note 4, Qualcomm/Redmi Note 4X, Mi Note 2, Mi 5s, Mi MIX, Redmi 4/4X and Redmi 4A.
MIUI 8 Global Beta ROM 7.7.20 Change log:
New – Switch for turning Battery saver automatically when charged (07-19)
New – 20 new themes, 94 new wallpapers, 64 new ringtones (07-13) (India)
New – 20 new themes, 44 new wallpapers (07-13)
Download the MIUI 8 Global Beta ROM 7.7.20 for all the above mentioned Xiaomi devices from here
You can follow this guide to see the installation process via fastboot or recovery.