The S40 platform maybe is the most used phone “operating system” in the world and is not based on Symbian unlike the others Nokia S60 OS. We have a leaked document from Nokia that indicates the world’s largest phone maker may be bringing touchscreen technology to the S40 platform. Nokia has already implemented touchscreen technologies on a number of S60 handsets, including the Nokia Xpressmusic 5800 smartphone and that is the company’s response to the iPhone. Additionally, the leaked document also notes that Nokia may also bring dual SIM phones to the market.
Here is the leaked info from Nokia about S40 platform: