[Q] PLEASE HELP ME, device bricked, no nandroid backup topic

I run a Micromax Canvas Tab P650. I committed an error.

I edited the build.prop file and changed the whole of that to that of Nexus 5. Now, when I rebooted, my GUI became very strange and apps stopped to work. Somehow, I re-edited my build.prop file and pasted the original content. Now, when I reboot, Nothing appears but Canvas Tab(the boot screen).

I do not have any nandroid backup.
I do not have CWM OR TWRP.
Please help