Proprietary operating systems dominate mobiles
"According to the recently released report from ARC Group, 97% of data-capable handset devices shipped in 2003 were powered by proprietary operating systems (OSs). Shipments of devices powered by third party open OSs reached 9.8 million units, all targeting smartphones and rich feature devices. While the volume of these devices has not built yet, the value attributed to them could be as high as 11% of the total handset market."