Hello, Mi Fans!
Here's the full changelog and download links for MIUI 9.5 Global Stable ROM V9.5.4.0.NAMMIFA for Redmi 4.
Full Changelog
System
  • Fix - The icon and battery level weren't always displayed consistently (04-04)
  • Fix - Some devices rebooted unexpectedly after an update (04-09)

Download Links
Redmi 4 V9.5.4.0.NAMMIFA
Recovery ROM | 1277M 858a4ffcc144ecf78b3e2c64bc0f54ef
http://bigota.d.miui.com/V9.5.4.0.NAMMIFA/miui_HM4XGlobal_V9.5.4.0.NAMMIFA_858a4ffcc1_7.1.zip
Fastboot ROM | 1788M 5fac99e033b4800aadd55f864c51fc08
http://bigota.d.miui.com/V9.5.4.0.NAMMIFA/santoni_global_images_V9.5.4.0.NAMMIFA_20180405.0000.00_7.1_global_5fac99e033.tgz