I have already written a blog on how to install a custom ROM on your android device.
Click here to check that out first !

I hope you guys have read that first because i'm skipping the backing-up and wiping part in this blog.
But those two steps are also VERY IMPORTANT so don't skip those! Watch my YouTube Video for more info!



Resurrection Remix v5.8.1 - https://forum.xda-developers.com/zuk-z1/orig-development/rom-resurrectionremix-m-v5-6-2-20160122-t3299543

Gapps - http://opengapps.org/


INSTALLATION -



1) Go to the location where you have downloaded the zip file of the ROM and select it. 
2) Make sure zip signature verification is unchecked.
3) Swipe.
4) Then go flash the Gapps, and do the same as above.
5) Again go to wipe > check cache and dalvik cache > swipe.
(This ROM needs the cache and dalvik cache wiped before and after installation)
5) Reboot your phone.

<< The first boot may take some time. So wait. >>

You'r all done. Now you have your Zuk Z1 ruuning the latest Resurrection Remix v5.8.1 based on android 7.1 (Nougat) ENJOY !!