The Samsung SPH-i300 was an early Palm OS-based smartphone manufactured by Samsung. It was released around 2001.It was marketed in the United States for use on Sprint's mobile phone network.It was the first "PDA phone" (as devices that combined phone and PDA functions were then called) in the USA with a color screen. The CDMA phone has a candybar-style design.It operates like a standard color Palm OS device, but several hard (external) and software buttons launch the 'phone' application, which manages calls.