Walton Primo S4 Lollipop Firmware, Flashtool & Drivers

Firmware Flashing Instruction of WALTON PRIMO S4

Download Link- Link

1. Install driver

2. Open Flash Tool. 
3. Open Download Agent and select MTK_AllinOne_DA

4. Open scatter_loadingand select scatter file

(Primo S4 Firmware>Primo S4 softwareàMT6592_Android_scatter)

5. Click FirmwareUpgrade then select Download and then connect USB cable with mobile (mobile must be off)

6. Then start downloading/flashing firmware

7. When it shows Download Ok, it means the installation/flashing firmware is completed.