The paper adds both devices will use metal casings and won't feature curved displays, and that Apple is "expected to scrap the plastic exterior used in the iPhone 5C."
More recently, Cowen's Timothy Arcuri has said supply chain checks point to the launch of a 4.8" iPhone supporting the high-speed 802.11ac Wi-Fi standard (already supported by various Apple and Samsung devices). Like others, Arcuri also expects a ~13" iPad to launch this year.
Calls for Apple to offer larger iPhones have been widespread amid soaring demand for large-screen Android devices, particularly in China and other parts of Asia-Pac. The launches could allow Apple to win back some European and Asian smartphone share lost in recent quarters to Samsung (SSNLF, SSNGY) and others.