The SPD Research Tool allows you to upgrade your Spreadtrum devices that comes with PAC firmware. Nowadays so many smartphones come with Spreadtrum PAC firmware. You won’t be able to flash that firmware on your Spreadtrum device by using some of the other popular flashing tools. Such as the SP Flash Tool or the MTK Tools etc. Download How to Flash: To overwrite your phones existing software with another. Rom: Firmware for your phone. .pac file: File in which research download uses. Before this it is important to have the VCOM drivers for you phone installed on your computer.  To start go … Continue reading (TUTS) How to flash ROM / firmware via SPD Research Tool