Another latest build “C185B310” Marshmallow for Huawei Honor 5X, is rolling out in the Middle Eastern region. The EMUI 4.0 B310 firmware is based on the latest Android 6.0.1 Marshmallow and has all improvements and bugs fixings. The users can update Huawei Honor-5X to B310 Marshmallow via OTA automatically in the region. However, if you willing to update manually then here is download link and installation instructions below. Follow the guide correctly to install Huawei Honor 5X B310 Marshmallow successfully.

Note: Here is the guide and firmware that be used only Upgrade Huawei Honor 5X to B310 Marshmallow [KIW-L21]. Don’t flash on any other variant. Also, it’s an official update and quite safe to install, however, we are not responsible for any mishap. Hence, flash and proceed only at your own risk.

Firmware Info:

Device Name: Huawei Honor 5X.
Model No: KIW-L21
Android: 6.0.1 Marshmallow.
Emotion-UI: 4.0
Firmware Build: B310/ KIW-L21C185B310
CUST NO: C185D006
Security Patch Level: May 1, 2016
Region: Middle East
Release Date: 10-10-2016
Status: Official -Full firmware.

Preps| Downloads:

Perform a full backup of the existing contents on the device before proceedings.
Make sure that the device’s battery is charged more than 60%.
Also, Install USB driver of Huawei or Hi-Suite at the PC for smoother connectivity. |Download Link
The device should already be running on KIW-L21C185B140/ KIW-L21C185B301 builds firmware.

Download B310 Marshmallow for Honor 5X- |Official Link -|Size: 1.57GB

File: [HONOR_5X_Firmware_ KIW-L21_ Android 6.0.1_ EMUI 4.0_ C185B310CUSTC185D006.zip]

Steps to Upgrade Huawei Honor 5X to B310 Marshmallow

Download and then extract B310 firmware zip from the link above at the PC.
Then connect Honor-5X to PC and transfer the dload folder from extracted to SD-card home directory.
Disconnect the Phone and Turn off
Now reboot Honor-5X via press and hold the VOL- UP+ DOWN+ POWER buttons all at once for a few seconds.
Finally, the update process initiated and the device boots normally.