Cintreuk

So Finally Wait is over here it is MIUI 7 Stable version for Redmi 1s with 10% More Battery and 30% Faster System Response.
MIUI 7 Global STABLE ROM 7.2.3.0 Full Change-Log 
[whats New]
New Music App UI
New File Manager UI
Improved Security App and new UI
Improved Mi Drop and UI
XS Text Size Added
New Weather App
New UI Layout For Sending Files
Improved Cleaner
[Whats Fixed]
Bug Fixes & System Improvements
Android Security Patch level is shown
Updates to Battery Usage Settings: Settings>Additional settings> Battery> Manage apps battery usage
Phone Can Now Shutdown in blink of eye.

Downloads
OTA LINK V7.1.1.0 -  v7.2.3.0
Direct
Direct2
RECOVERY ROM Stable LINK Mirror v7.2.3.0
Direct
Direct2
OTA LINK V7.0.50 -  v7.1.1.0
Direct
Direct2
RECOVERY ROM Stable LINK Mirror v7.1.1.0
Direct
Direct2
RECOVERY ROM Stable LINK Mirror v7.0.5.0 
Direct
Direct2
Flashing Method is Same [if you got problem checkout some links given below]
Simplest Method with stock recovery : 
1. Connect your phone to the computer.
2. Copy the ROM file to the folder downloaded_rom in the internal memory.
3. Open Updater on the launcher
4. Press the Menu button ? Select installation file.
5. Choose the ROM zip you want to flash and select Update now.
6. After updating is completed, select Reboot now to enter the new system.
OR Rename the downloaded file to update.zip and go to recovery just by pulling out your Battery and insert it again press volume up + power button until your device boot in stock recovery.
Now Clear cache and Flash update.zip
If you got any problem try this
How to Flash MIUI Rom with Stock Recovery
If you have twrp recovery you can try this
1. Go to Recovery just by pulling out your Battery and insert it again press volume up + power button until your device boot in twrp recovery.
2. First press Setting then press screen now uncheck Enable Screen Timeout.
3. Now go back to main option screen and select Wipe option.
    Now select Advance wipe and Select Dalvik Cache + Cache only.
    Now Swipe the arrow at bottom saying Swipe to Wipe. Wait
4. Now go back to main option screen and select Install option and choose Rom file just downloaded.
5. Now Swipe to install.
6. After Flashing Done Press wipe dalvik and cache [see bottom left hand side.]
7. Reboot your device and wait for 15Min.