If you were waiting for the arrival of Android 6.0 Marshmallow on your Karbonn K9 Smart 4G, then here is a good news. Those who were wondering to install the latest Stock ROM Firmware on your device, can now rejoice as they can flash the latest software on their device. Karbonn has officially released the … Continue reading Install/ Update Karbonn K9 Smart 4G to Android 6.0 Marshmallow Stock ROM Firmware