The two-year-old Lenovo A6000/Plus will not get the official Android 7.1 Nougat (EMUI 5.0) update, however custom ROM lovers can enjoy latest and sweetest Android 7.1 Nougat on Lenovo A6000/Plus. Based on the CyanogenMod 14.1, the AICP 12.1 custom ROM brings Android 7.1.1, various new features and latest Android security patches to Lenovo A6000 and A6000 Plus. If you are interested, check out the installation instruction.
The Android 7.1.1 Nougat based AICP 12.1 custom ROM for Lenovo A6000/Lenovo A6000 Plus is almost stable and there were no major bugs in this ROM. However, since the ROM is built on CyanogenMod 14.1 Nightly, you may experience glitches and cannot be used as a daily driver. If you are ready to face few issues, proceed with installation.
Note: To install AICP 12.1 custom ROM, your Lenovo A6000/Plus should be running on Android 5.0 Lollipop or Android 6.0 Marshmallow based custom ROM.
The below guide assume that you have root access and latest version of TWRP recovery (v3…) on your device. Create a backup of data you have on your phone before you jump to the guide.
Disclaimer: Follow the instruction at your own risk. We will not be liable if any damage occurs to your device and/or its components. This is recommended for technically talented users only.
2. Boot your device into TWRP Recovery mode (Switch off the phone, press and hold Volume down and Power button together)
3. In TWRP recovery, choose ‘Backup’ and create a backup of the current ROM (recommended)
4. Return to main TWRP menu, choose ‘Wipe’ and wipe Data, System, Cache and Dalvik Cache.
6. After the process is done reboot your device.
Setup and enjoy Android 7.1.1 Nougat on your Lenovo A6000. Let us know your thoughts about this ROM in the comments. (Source – XDA)