Here are the bugs which i found:
1) no proper boot animation only black screen appears and kernel image is also crashed
2) Shows 'No Service' in statusbar even when sim is working
3) Why no play store support?
4) the settings application crashes when selected display-->launcher/Proximity calibration
5) Volume rocker option in settings-->button doesn't work(my power button isn't working too hard to press so I need it)
Reat all is great but bit laggy...
1) Micromax A89 Ninja - LEWA v13.12.06