"Huawei P9 Lite 2017 (Prague) ROMs" – Be aware that 99% of threads are dead. Example search query for Google: site:forum.xda-developers.com Kirin 655 GSI or Huawei NMO-L31 TWRP Disclaimer: Modifying your Huawei NMO-L31 voids any remaining warranty, can permanently brick the device (hard brick = unrecoverable without paid service box), and may cause loss of IMEI/network functionality. Proceed entirely at your own risk. No Custom ROM for this device is fully functional.
Huawei devices released after 2015 use Kirin processors. The NMO-L31 has a Kirin 655 . Unlike Qualcomm Snapdragon devices, Kirin chips have poor aftermarket developer support (no full source code release from Huawei). This means there are NO fully stable Custom ROMs like LineageOS, Pixel Experience, or Evolution X for this device.
Below is a realistic, professional guide on what exists, the risks, and the only alternatives to stock EMUI. Device Codename: Prague (or VNS-L31 variant compatibility) Chipset: HiSilicon Kirin 655 (64-bit, ARM Cortex-A53) Stock OS: EMUI 5.1 (Android 7.0 Nougat) / EMUI 8.0 (Android 8.0 Oreo via update) The Hard Truth: Why Custom ROMs are practically dead for this phone Unlike Samsung or Xiaomi devices, the Huawei NMO-L31 features a Kirin processor . Huawei never released the full kernel source code or the proprietary drivers (Linaro/Huawei’s graphics blobs) required to build Android 9, 10, 11, or 12.
