How to Flash Huawei LUA Phones

Here we give you detailed step by step tutorial on how you can safely and successfully flash Huawei LUA mobile phones.

HUAWEI LUA-Uxx USB Upgrade Guide

Part I: Preparation

STEP 1：Install the driver

If it’s the first time you upgrade LUA-Uxx, please install USB driver by the following document

Step 2. Choose Upgrade methods by original version

Because KEY file changed during LUA-Uxx project developed, so for some old version, you need to unlock first and then you can upgrade to target version （”LUNA versions corresponding KEY files” table does not have version are “DA_LUNA_KEY” corresponding version，please refer to Method 2 to upgrade）

Power on the file, input *929# on dial pad（If it is a software version of the Middle East and Africa，when input *929# no reaction，please use *#*#929#*#*）, check Software Version information
Refer to “LUNA versions corresponding KEY files” to check KEY file of the current version:

If the current version use “DA_LUNA_KEY”, please refer to Method 2 to upgrade

If the current version do not use “DA_LUNA_KEY”, please refer to Method 1 to unlock and upgrade

Method 1.

LUA upgrade software with SD card

LUA SD card upgrade can through the following step:

Established at the root of your SD card folder “dload”, SD Card Upgrade kit full name modified “update.zip”, Placed in the “dload” folder

Power on -> settings -> System update
Start shutting down into the automatic promotion automatically after the upgrade is complete the power on

Alternative 2.

With the update.zip file in the dload folder of your SD card, switch off the phone.
Press and Hold all the three keys together for 5-8 seconds untill you see the update prcess start and then release the keys and wait for the process to finish.
NB: Hold the volume up + volume down + power button

Method 2.

Step 1: Turn off the phone

Step 2: Open flash tool in \Software\upgrade tools&drivers\FlashTool

（SP_Flash_Tool_exe_Windows_v5.1540.00.000）of Software package

Step 3: Click Download Agent (2 in above picture), choose DA_SWSEC_HWKEY.bin

Step 4: Click Scatter-loading (3 in above picture), choose MT6582_Android_scatter in \Software\USB upgrade\Software\

Step 5: Choose download mode to “Download Only”, only check SEC_RO options, click on this option file path behind, select the corresponding secro-sign file according to “versions LUNA corresponding KEY file”（These files are located Software\upgrade tools&drivers\Unlock files）

Step 6: Click “Download”, plug USB cable into the phone, and install the battery, download will start automatically. After downloading, there will be a popup dialog, unplug the USB cable, now the phone is unlocked.

Step 7: “Download Agent” unchanged（Continue to use DA_SWSEC_HWKEY.bin）, click Scatter-loading, choose MT6582_Android_scatter file of target version (\Software\USB upgrade\Software).s

Step 8: download mode select Firmware upgrade mode, click “Download” to download.

Step 9: Plug USB cable into the phone, and install the battery, download will start automatically

Step 10: After the download is complete, It will pop up a message box prompts to complete, close the pop, unplug the cable, press the power button card machine, If you can normally boot, ends.If you can not successfully boot, then prove that different cell phone inside the original version and the current version to download the name, according to the step 11 operation.

Step 11: Download Agent Select “DA_LUNA_KEY.bin”, download mode select Firmware upgrade mode, Scatter-loading unchanged, click Download to download. , Insert the USB data cable, start the second download, the download is complete, unplug the cable, press the power button to boot the phone.

Part III: Method 2

Step 1: Turn off the phone

Step 2: Open flash tool in \Software\upgrade tools&drivers\FlashTool

（SP_Flash_Tool_exe_Windows_v5.1540.00.000）

Step 3: Click Download Agent, choose DA_LUNA_KEY.bin

Step 4: Click Scatter-loading, choose MT6582_Android_scatter folder of target version (\Software\USB upgrade\Software)

Step 5: choose “Download Only”, uncheck “PRELOADER”, Click “Download”

Step 6: Plug USB cable into the phone, and install the battery, download will start automatically

Step 7: After the download is complete

Part IV：FAQ

If you encounter the following error because the Download Agent did not choose the right reasons, careful comparison guide book to see if the correct choice

If you encounter the following error, there are three reasons：

(1) did not shut down the computer for a long time – restart to solve

(2) the battery is low – replace a sufficient battery charge

(3) USB data cable connection is bad – Make sure the connection is good or replace a data cable

If you encounter the following error（Or encountered during the SD upgrade interface upgrade cycle ）, this is caused because the operation is not standardized, please contact R & D personnel to help solve