The Stable update V18.104.22.168.KHCMIDL has been officially released for Redmi 1S (codename is armani). Before updating, please make sure you have downloaded the exact ROM matching your Xiaomi phone/tablet. In Fastboot mode, you can check model code by typing
fastboot getvar product in cmd/shell.
The firmware files posted here are all official Xiaomi ROM, xiaomiROM.com do not own and never modified those firmwares，you will always download the file from Xiaomi server.
You may interest in those contents: Redmi 1S ROM Topics Xiaomi Devices Index
Download Redmi 1s (armani) Global MIUI 8 V22.214.171.124.KHCMIDL Fastboot ROM with Android 4.4. Firmware size is 1.0 GB.
Download Redmi 1s (armani) Global MIUI 8 V126.96.36.199.KHCMIDL Recovery ROM with Android 4.4. Firmware size is 828.2 MB.