Xiaomi has released MIUI 8 Global Stable ROM 7.7.6 for all the supported Xiaomi devices. The MIUI 8 Global Stable ROM 7.7.6 brings multiple improvements and new features in Lock screen, Status Bar and Notification Bar. These are the device that got MIUI 8 Global Stable ROM 7.7.6, 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.
Download the MIUI 8 Global Stable ROM 7.7.6 for all the above mentioned Xiaomi devices from here
You can follow this guide to see the installation process via fastboot or recovery.