Walton Primo D4 Firmware, Flash Tool, Driver & Upgrade Instruction Walton Primo D4 Firmware, Flash Tool, Driver & Upgrade Instruction 14 November Bijendra Narsinghani Share To: Primo D4 official firmware & flashtool Download link: Primo D4 Official firmware Primo D4 Firmware upgrade instruction # Install Driver by clicking “install” from “Driver” folder # Open Flash tool (MultiPortDownload.exe file from flash tools folder) 1. Set Scatter-loading (“MT6572_Android_scatter.txt “file from “SW” folder) 2. Click, BootRom+Preloader COM Sel All 3. Click, Start All 4. Press and hold volume up key till progress start 5. Connect USB cable & insert battery It will starts SW Upgrading and After several seconds, it will show “Cksm(USRDATA) OK…100% “ with green icon. Done!!!
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