RBC Capital Markets analyst Amit Daryanani has released a new research report today citing supply chain checks as the basis for predicting a June or July launch for both the iPhone 5S and a lower-cost iPhone, in line with other recent reports. Daryanani says, however, that the lower-cost iPhone appears set to omit a Retina display.Our supply-chain checks indicate that AAPL is working to launch multiple new phones in the June/July time-frame this year. Specifically, AAPL will launch the iPhone5s and a more affordable but lower-end iPhone at the same time, in either late CYQ2 or early Q3. The low-end iPhone will have the same 4" form factor as the iPhone5 but will have plastic casing and no retina display. With a lower price-point, AAPL will be able to target a growing and important part of the Smartphone market (