Firmware, Flashtool, Driver download link: Download
Primo C2 Firmware upgrade instruction
1. Install Driver
2. Open Flash tool ( Flash tool.exe file from flash tools folder)
3. Set Download Agent (“MTK_AllInOne_AS.bin” file from Flash tools folder)
4. Set Scatter-loading (“MT6572_Android_scatter.txt “file from Software folder)
5. Click Firmware->Upgrade in Flash tools
6. connect the handset to PC with USB cable and then Insert battery
It starts downloading now and After several seconds, it shows a green-circle popup and sw flashing completes.