Do you own Spice V801? If yes, then you need to download the official drivers for your device in order to connect your phone to a computer or for flashing firmware on your device. Just follow the guide.
Yu Yunique 2 is a smartphone that was launched in 2017, July. The phone comes with IPS LCD capacitive touchscreen. If you are looking for your device drivers, then you are in the right place. Just follow the article and you are good to go.
Samsung Galaxy A8 is a super awesome smartphone that was released in 2015, August with Super AMOLED capacitive touchscreen. The phone support Nano-Sim. Here, you will find the official drivers for your device in order to connect your device to a computer or flashing firmware.