View this article at: http://dev.macnn.com/articles/07/01/12/jobs.on.iphone.platform Friday, Jan 12, 2007 4:30pm Jobs speaks on closed iPhon... Apple CEO Steve Jobs recently spoke with Newsweek about the company's new iPhone, revealing that the software on the device is purposely closed to prevent potential issues from cropping up on Cingular's network. "You don’t want your phone to be an open platform," said Jobs, referring to the concept of any phone owner writing applications for it. "You need it to work when you need it to work. Cingular doesn’t want to see their West Coast network go down because some application messed up." Despite the closed platform, however, the iPhone still runs some form of Mac OS X that can functionally support numerous applications not currently present on the prototype phone displayed by Apple's chief during his keynote at Macworld. "There’s no reason we couldn’t have iChat on here," Jobs said when prompted to speak on the topic. When presented with the concept of allowing iPhone owners to take a song from their iTunes music library and turn it into a ring tone, however, Jobs said it could be done but implied through a simple hand gesture that the move would cost Apple a fairly large sum of money.