Before you get start with the installation, keep in mind that the below given installation instruction is for Lenovo ZUK Z1 with Cyanogen OS. Do not try it with ZUK Z1 with ZUK UI. In addition, your device should have root access and latest version of TWRP (3.0+) custom recovery installed on it.

Android 7.1.1 Nougat (LineageOS 14.1) brings various new features to Zuk Z1. Users can experience multi-window mode, enhanced notification system, data saver mode, night mode, one-handed mode, better battery life, latest security patches and more. However, note that the status of the ROM is nightly, so it might have many bugs that have not been fixed yet. So do not install on a regularly using device. Important: Before proceeding with below steps, back up all data you have on the phone to a safe location. Also, ensure at least 50% battery charge remaining on the phone. Note: Once again we remind you that the below method is for Lenovo ZUK Z1 with Cyanogen OS. Do not try it on ZUK Z1 with ZUK UI.

How to install LineageOS 14.1 (ham) on Lenovo ZUK Z1

  1. Download latest build of LineageOS 14.1 for ZUK Z1 from here and the Gapps 7.1 Nano package from here
  2. Transfer both zip files to phone’s internal memory.
  3. Reboot Zuk Z1 into TWRP recovery mode. To do so, switch off the phone, press and hold the Volume Down, Volume Up and Power buttons few seconds.
  4. In TWRP recovery, select ‘Wipe’ > Advanced > and clear cache, data and factory reset.
  5. Then, select ‘Install’ and navigate to LineageOS ROM zip file and swipe right to flash. Repeat the same for flashing Gapps zip file.
  6. Return to main recovery menu, select ‘Wipe’ and clear cache and data.
  7. Finally, reboot your ZUK Z1. It will take 10 – 30 seconds for the first boot. Once booted up, set up and Enjoy Android 7.1.1 Nougat. Leave your views in the comment section below (Source – LineageOS)