Apple Insider posted a story that Apple's next-generation iPhone will ditch the glass back of the iPhone 4 for a metal chassis, but its screen size will be smaller than 4 inches, according to the latest rumor.

Citing sources in Apple's overseas supply chain, DigiTimes reported on Monday that the so-called "iPhone 5" will "not have many differences" when compared to the current-generation iPhone 4. The largest difference will be a metal chassis on the back, replacing the reinforced glass found on the iPhone 4.

"The sources added that the iPhone 5 will adopt a 3.5- to 3.7-inch panel with a design to allow the bezel of the panel to become thinner and make the screen look larger," the report said.

  Apple's iPhone 5 rumored with metal chassis, less than 4-inch screen