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marshmallow Primo D8s Firmware, Flashtool & Drivers

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Flash Tool Instruction- Walton Primo D8s


Firmware Download Link-


Step 1: Driver Installation

Install the drivers. 

Step 2: Open Flash Tool

Open the Flash Tool. Enter folder named " UPGRADEDOWNLOAD_R4.0.0001". Then enter file named "Bin". There you will see an icon named " UPGRADEDOWNLOAD.exe"

Step 3: Pac Loading

a. Click "Load Packet". A new window will appear.

b. Enter "Primo D8s Firmware" folder and select " Primo_D8s_V1.5_20161121. Pac" file

c. Click "Open"


Step 4: Firmware Upgrade {Click "Start"}

Step 5: Connect The Handset

After clicking the "Start", press the volume down key of your handset, and connect it to your computer with USB cable. Remember: Before connecting the handset with your computer, you must turn it off. Also notice that the battery has to be kept inserted.Flash operation will begin, you will see this window:


Step 6: Notification

There will appear "Passed". This means it is successful.


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