Huawei Y9 Prime 2019 STK-L21 EMUI 12 Middle East-Africa Install Guide

EMUI 12 is rolling out for Huawei Y9 Prime 2019. In this post, we will share the installation guide for the STK-L21 Middle East variant. This update is only compatible with phones running EMUI 10 with cust C185. You can check the cust version in the build number. Most African countries also have the same cust for open market devices. This firmware will not work on carrier-branded phones. Strictly not for Y9S

Huawei Y9 Prime 2019 STK L21 EMUI 12 Middle East and Africa
Huawei Y9 2019 STK-L21 EMUI 12 the Middle East And Africa


  • This update introduces EMUI 12, providing you with an intuitive interface, a multi-device section in the Control Panel, and various useful functions.

Huawei Y9 Prime 2019 update Requirements:

  • Disable antivirus/Windows Defender (Very Important)
  • The phone must be running the latest EMUI 10
  • Your phone must have cust version C185 (check build number)
  • The battery must be charged up to 60%
  • Good quality USB cable
  • Windows 10 / 11 computer
  • Hisuite OVE must be installed Download From This LINK
  • Download Hisuite Proxy V3.1.3 from THIS LINK
  • Connect phone in Hisuite

Installation Process (Read very carefully):

  • Extract the Hisuite Proxy V3.1.1
  • Run Hisuite proxy, and make sure you allow firewall access when it asks
  • Tap on the ” Setup “ button in the Hsiuite proxy.
  • Tick “Override IMEI”
  • Make sure you tick in “Target build number”
  • if your phone has C185E2R2P1 in the build number copy STK-L21M-LGRP10-OVS
  • if your phone has C185E2R4P1 in the build number copy STK-L21M-LGRP10-OVS
  • if your phone has C185E2R5P1 in the build number copy STK-L21M-LGRP10-OVS
  • if your phone has C185E2R6P1 in the build number copy STK-L21M-LGRP10-OVS
  • paste it in the “Target Package Build Number” section
  • Must tick ” Force Auth Bridge “
  • Open Hisuite again and connect your phone, check for updates in Hisuite 
  • Start installation
  • For your ease, please see the exemplary screenshots below
Hisuite Proxy Config Screenshot_1
Hisuite Proxy Guide for EMUI 12
Hisuite Proxy Config Screenshot2
EMUI 12 Update in Hisuite

Watch the video for more help

Credit: Huawei Firmfinder Team

Note: Everything you do at your responsibility, this guide is provided for free without any guarantee.

Mutahhar Bashir

Passionate blogger, have excellent problem solving skills, quick learner, love to accomplish difficult tasks, improving my skills while helping others through this blog.

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3 Responses

  1. mojtabamj says:

    Is there no other way to try?

  2. Ehsan says:

    Thank you very much, it worked

  3. azamohd says:

    my phone is stk l21 (c185E7R3P1) i can not update it to the new emui 12
    any help please
    best regards

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