Lenovo K3 Note has got much development, and unofficially Marshmallow based custom ROM has been released. Vibe UI 3.1 Custom Rom is running on Android Marshmallow 6.0 which is based on 1606 development version with pre-rooted features apps like UC browser, headlines today pre-installed. You just need to have a custom recovery like TWRP and flash the custom ROM using the TWRP menu from the recovery.
DISCLAIMER: Please be advised that Techolite or its authors are not liable at any cost if you brick your device, or the data is lost, it is suggested that you take a backup of your current ROM and data. Installing/Flashing/Rooting custom ROMs & custom recoveries are risky, you’re solely responsible for everything.
Things to do before you Flash Vibe UI 3.1 On Lenovo K3 Note:
Take a backup of your data. Because system will be wiped during the process
Enable USB Debugging on your device.
Goto > Settings > Developer Options > USB Debugging.
If Developer Options is not located under settings then enable it by going toSettings > About Phone > Device Info and tap on Build Number for about 7-8 times. And then go back and follow the previous step.
Make sure the battery is 50% charged or more.
Go to Settings > Securityand enable Unknown Sources option.
How to Install Vibe UI 3.1 Custom Rom
Step 1: Copy the zip file downloaded to your SD Card