There is no news about official Android 7.1 Nougat update for 2nd Gen Android One devices, but you can get Android 7.1.1 Nougat on it via LineageOS 14.1 custom ROM. LineageOS development team has released Android Nougat based LineageOS 14.1 for Android One (2nd Gen) devices (code named seed) that you can install on General Mobile 4G, Cherry Mobile One G1, I-Mobile IQ II and other Qualcomm variant Android One devices.
If you own an Android One device (2nd Gen) and would like to experience the latest OS on it, then check out the installation instruction to update your 2nd Gen Android One device to the latest Android 7.1.1 Nougat via LineageOS 14.1. You can install this custom ROM on any Android One phone (code named seed) powered by Qualcomm processor.
Before you start, note that the LineageOS 14.1 is a Nightly build, which means the ROM is unstable and include bugs that are not yet identified. However, if you are ready to face few issues, install LOS14.1 right way and experience Nougat.
Note: The file given here is for 2nd Gen Android One devices (seed). Do not install it on 1st Gen Android One devices (sprout).
The below guide assume that you have a bootloader unlocked Android One device with root access and latest version of TWRP recovery (v.3.0.2) installed.
Important: Backup every data you have on the phone before proceeding.
How to Install LineageOS 14.1 on 2nd Gen Android One Devices
Disclaimer: Follow the instruction at your own risk. We will not be liable if any damage occurs to your device and/or its components. It is recommended for technically talented users only.
2. Switch off your phone and boot in to TWRP recovery mode (press Volume Up and Power buttons together).
3. In TWRP recovery, select ‘Backup’ and back up the current OS (recommended).
4. Now, select Wipe > Advanced Wipe > select wipe cache, dalvik cache, system, data and swipe right to confirm it.
5. Now, go to main recovery menu, select ‘Install’, choose the ROM zip file and swipe to install it. Repeat this for installing Gapps package. Once done, reboot your device.
Your Android One will boot into Android 7.1 custom ROM. Setup and enjoy. Leave your views in the comment section below.