Hello, Mi Fans!
Here's the full changelog and download links for Redmi 1S V9.2.3.0.KHCMIEK.

Full changelog
System
Optimization - Filter risky message in push notifications. (04-19)

Download Links
Redmi 1S (WCDMA 3G) V9.2.3.0.KHCMIEK
Recovery ROM | 480M fb8976a498875c6ebb958417780b9dfc
http://bigota.d.miui.com/V9.2.3.0.KHCMIEK/miui_HM1SWCGlobal_V9.2.3.0.KHCMIEK_fb8976a498_4.4.zip
Fastboot ROM 879M 1757bfb6f6c019d31ce2fd8fc4de3c8f
http://bigota.d.miui.com/V9.2.3.0.KHCMIEK/armani_global_images_V9.2.3.0.KHCMIEK_20180406.0000.00_4.4_global_1757bfb6f6.tgz