Stock ROM File Name: Panasonic_Eluga_Arc_5.1.040.P0_160826_5.1_CPB.zip
Stock ROM File Size: 1 GB
Android OS Version: 5.1
tools: https://rootmydevice.com/download-ygdp-tool/
drivers: https://rootmydevice.com/download-coolpad-usb-drivers/
file link: https://drive.google.com/file/d/1enFRIOuFnIiL03HxnoT8WiCeNidauw_k/view