Here is Android 7.1 unofficial Lineage OS Lenovo K4 Note Download.This guide will help you how to install Android 7.1 Nougat Cm14.1 or Lineage OS step by step easily on your K4 Note.Thanx to mohancm, Senior Member of XDA for this Custom Rom.
Now you can enjoy the latest Android 7.1 Nougat on your smartphone.Now Download the Android 7.1 Nougat unofficial Lineage OS For K4 Note. You need a Custom Recovery like TWRP to Install CyanogenMod 14.1 or Lineage OS for Lenovo K4 Note.
This will work on Lenovo K4 Note , Don’t Try this in Any other device.
Charge your phone up to 80% or 70%.
Backup your current Rom before doing this step using TWRP or CWM or any Custom Recovery.