How to take Backup and Flash Any Custom ROM with twrp recovery

Please Read whole post before applying any step

This guide is for user with rooted android phone and twrp recovery.

If you are not rooted and want to root your redmi 1s  check this How to Root Redmi 1s

If you don't have Custom Recovery Check this How to Flash Custom Recovery

Please don't play with System more your device may brick with more tweaks don't worry there's only 1per cent chance use it just for flashing this rom if you are new in rooting.

What to do Before Flashing Custom ROM ?

Always take backup of your stock rom
Boot into Recovery you will see backup option just create a backup make sure you have enough space available.
Select System + Data + Boot and Swipe backup.

How to Flash?

So after downloading rom desired rom copy it to internal memory.

1. Go to Recovery just by pulling out your Battery and insert it again press volume up + power button untill 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 + Data + System

    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.