Last week, we know that the first signs that suggested the possible presence of iPhone OS 3.1.3, and iPhone 4.0 firmware. Today, MacRumors has been tipped by a developer who has spotted a single instance of iPhone OS 4.0 being used in his application’s Pinch Media analytics data. This result is similar to open "iPhone 3.1" (the new generation iPhone 4G model), which was seen by the developer iBart app last month.
When the iPhone 3.1.3 actually comes out, we expect a minor update, and it may release in the first half of 2010. The OS 4.0 certainly denotes a major release version and we can expect it to ship next-generation iPhone model, which is expected to be released in the summer months, at WWDC 2010. Nothing much is known about the functions that the new firmware will be offered, but we can not expect it to add many new features, similar to that experience, firmware 3.0 was released.