Huawei Mate 9 Pro LON-L29 official Stock EMUI9.1 firmware is now available. The firmware version is 254. This update is only applicable to phones with cust version C636. Android 9 is running EMUI9.1 on top. This is official stock firmware from Huawei and can be installed by following the official method. You can either use an sd card/OTG to install it or any 3rd party tool can be used. This firmware can be helpful in unbricking your phone.

Firmware Details:

• Android Version: 9.0
• EMUI Version: EMUI 9.1
• Build Number: LON-L29 9.1.0.254(C636E7R1P6T8)
• Supported Model: LON-L29 (HongKong-Asia)
• Update Type: Official Stock Firmware
• Download Link: Click Here
• Password=https://ministryofsolutions.com LON
• Tip: Use Internet download manager for faster download speed

Installation Guide:

• Backup all important data from the phone
• Charge the battery up to 60%
• Get a micro sd card / OTG USB with 8GB of free space
• Extract the downloaded firmware zip file (password=https://ministryofsolutions.com LON)
• Then copy the dload folder to your sd card / OTG USB
• Then power off the phone and disconnect from pc. Hold volume up, volume down, and power, keep holding until the update starts.

Background source: Lewis J Goetz