[Miscellaneous Android Development] kank_fraud:
I am gonna keep this short as I am posting this from a tablet and I dont have a physical keyboard.

Download all the files below

Extract the recovery on your C:\ drive so that its short to type

Put the phone in fastboot mode and type the following in the command window

After successful flash, disconnect, take out the phone battery, put it back and press volume down+power button untill Karbonn splash screen to boot into TWRP recovery. Go to youtube to check how to change language to english.(Sorry I made this on a windows tablet and in half an hour, didnt check properly)

Now the first thing you want to do is make a backup.

Select only boot, system, data(if you want to) to make a backup.

Please refrain from messing with any other partition in your phone.

Flash the SuperSU zip file to root your phone.

Install Root Explorer and delete all the crapware the phone comes with(specially Tap n Buy which you cant disable) and Google Apps that you dont require.

You can use the light weight versions of some of the Google Apps called Go Apps. Some I have provided along, like the Maps Go, Youtube Go.

You can install the Pixel Launcher if you want. Also if you delete the google photo app, please install the lineage gallery apk.

Although it has 1GB RAM, its still not enough. Specially with Android 7 and the google apps installed. Specially the Google search app consumes a lot of RAM. Multitasking is not possible. Delete the gboard keyboard and install the lightweight keyboard I provided along. Do not update it in playstore

For this device Android Oreo Go is more suited with Google Go Apps.

Thank the original developers of the apps

I modified the TWRP of another phone to work with this phone. I didnt originally make the recovery. It is made for an older chipset SC8830 and not for this phones chipset SC9832. I just modified it so that it would work. If you find any problem, please report and I will try to solve it. I dont know who is the original porter btw.

Backup and restore of the rom, flashing zip files work(thats all I have tested cuz thats all I need).

I am unable to flash the stock rom with the flash tool so I am not gonna mess with any other partitions(search the web for it)

IMEI can be restored with the IMEI tool(please do not ask for it)

Please only backup, format, flash and modify only boot, recovery, system, data and sdcard partitions

If you do not know and you modify the other partitions that relate to the basebands, wifi, mac address, IMEI, etc.... then I am not responsible for your stupidity.

With supersu powers, comes greater responsibilities

If your device bricks, then dont blame me

Link to my stock firmware TWRP backup. Restore from TWRP http://www.mediafire.com/file/tf0enb455nafp6n/Rooted_stock_without_crapware_and_replaced_GApps.zip

Only boot and system partition backups

Extract the files to your TWRP backups folder in your sdcard.

Its not a zip flash file.

I made this as a test. So any issues, please report.

Tap n Buy was annoying me as I cant disable or uninstall. And due to large apps like google app and gboard, whatsapp, even messaging was closing down. Very important to me both.

So I found a workaround and its working pretty good.

I'll try to post a proper recovery once I have time.