I installed CWM Recovery 5.x.x.x(I don't remember the exact number).
Then I wiped the cache, data and Dallvik Cache.
After that I tried to "Install from SDCard" > then selected the Nokia X. Zip file
The CWM says, looking for Update.zip and tries to install Update.zip
after 1 min it says update has been installed, after rebooting I can't see the nokia look and feel.
Should I use only twrp Recovery, or CWM is fair enough.
Why does he search for update.zip, can't it install everything inside the ZIP file?.
I did tried to install the TWRP through the fastboot but after that my recovery mode stopped working. I may have to fall back to the CWM recovery now.
Finally, let me know anyone who tried to install this on Karbonn A21 and succeded.