Piper Jaffray analyst Gene Munster late yesterday issued a new research note using average low-end smartphone pricing in emerging markets to argue that Apple's rumored lower-cost iPhone will launch in September with a price tag of around $199 unlocked. Munster examined smartphone pricing on 15 different models across six international markets (Germany, UK, France, China, Brazil and India) to find that lower-end smartphones average slightly over $200 unsubsidized. In China and India, the average prices are $138 and $140 respectively, while Apple's cheapest existing phone, the iPhone 4, averages over $500.We believe the last finding demonstrates that the biggest pricing gap for iPhone exists between the cheape