A new update from Apple for iOS 4.0.2 has been released and this is supposed to be compatible to the lower versions of iOS. In the recent past, iPhone app developers have faced an array of the problems to run iOS 4.0.2 in iPhone 3G and 3GS. However similar problems have disturbed the development for 2nd and 3rd generations of iPod Touch with iOS 4.
In addition the update is expected to fix the security vulnerability related to viewing malicious PDF files. It is also expected to fix the iproximity sensor glitch that many users have faced and are waiting for. Now even the iPhone app developers can develop iOS 4 apps keeping iPod and and iPhone 3G in their mind.
From the users’ point of view we see that the iPhone users who has already upgraded the OS need not regret any more 
