If you have flashed custom roms on your unite 2 and want to go back to original stock firmware.Here,is the recovery flashable stock kitkat 4.4.2 rom from XDA.You need to follow simple steps to install stock firmware using CWM Recovery.If you have not flashed CWM recovery then first read this post:Install CWM Recovery in micromax A106 without PC
This guide is for both the models of Micromax A106(4GB & 8GB).
Do at your own risk because flashing sometimes bricks your device if not done properly.
Follow the steps to flash recovery flashable stock kitkat rom:
1.Downlaod the Stock kitkat4.4.2 firmware(Download)
2.Put the downloaded zip file in external sdcard.
3.Flash CWM recovery if yet not flashed(Read Here)
4.Reboot to recovery (press vol up + vol down + power button to reboot to recovery).
5.Wipe data/factory reset.
6:Wipe dalvik cache too.
7:Select install zip from sdcard.
8:Select choose zip from sdcard.
9:Select downloaded Stock Rom.
If you find any problem feel free to ask…i will help you.