http://webtrickz.com/how-to-install-stock-mi-recovery-2-0-1-on-redmi-1s/
Recently, we shared a guide on “How to install CyanogenMod 11 (Android 4.4.4 KitKat) ROM on Redmi 1S”. The procedure required the installation of ClockworkMod Recovery (CWM) to flash custom CM11 ROM. Apparently, several Redmi 1S users have flashed CWM recovery on their phone in order to install a custom ROM for improved performance or for other reasons. Perhaps, if you’ve switched back to MIUI ROM on Redmi 1S but are still running the CWM recovery, then you won’t be able to install the official MIUI OTA updates. That’s because, OTA updates are installed through MIUI Updater app that uses stock Mi-Recovery to update the device to latest version. Also, you might not be able to install the OTA update via CWM too.
Although, the OTA updates such as the latest one (JHCMIBH41.1 Stable) for Redmi 1S will be downloaded to downloaded_rom folder on internal storage but its installation will fail due to the absence of stock recovery. To overcome this problem, you can simply revert back to stock recovery on Redmi 1S by installing it through CWM recovery. Steps below:
Requirements: Xiaomi Redmi 1S WCDMA with a SD card inserted.
2. Transfer the downloaded .zip file to the root directory of your SD card.
3. Reboot into CWM recovery – To do so, go to Updater app, press menu button and then click “Reboot to recovery mode”. Alternatively, power off the phone and then press “Power + volume up” button simultaneously to boot into recovery mode.
4. Select ‘Install zip’ > ‘choose zip from sdcard’ and then choose ‘signed_stock_recovery_update.zip’ file and install it.
Now go back and Reboot your phone by selecting ‘reboot system now’. That’s it!
~ Next time you reboot into recovery, you will find the Stock Mi-Recovery 2.0.1. You’ll now be able to install OTA updates normally. Hope you found this post useful. 
Update – Apparently, OTA updates can be installed even if you’ve CWM recovery installed on Redmi 1S. You can choose ‘Yes – Disable recovery flash’ option in CWM during OTA update installation, to prevent the update from flashing stock recovery on boot.
