Karbonn K9 Smart Grand is an android smartphone that was launched back in 2017, September. The phone comes with Dual-Sim mechanism. If you want to connect your device to a computer or flashing firmware on your device, then you need to download the required drivers for your device. Just follow this guide.
I am an experienced Software Engineer and freelance Android app developer. Here at USBDriversPie, I help you find latest USB drivers for your smartphone and tablet.