As expected, Apple today rolled out the iOS 4.2.1 firmware. The iOS 4.2 firmware is available for iPhone 4, iPhone 3G S, iPhone 3G, iPad 3G, iPad WiFi, iPod Touch 4G, iPod Touch 3G and some other devices. Among all devices, iPad is the biggest beneficiary of the iOS 4.2.1 firmware update. Apple iPad users can now enjoy multi-tasking, folders, Game Center and other iOS 4.0 features with the new firmware update. Apart from this, they will also get some new feature like AirPlay, AirPrint, etc., that are specially designed of firmware 4.2. The fourth generation Apple device’s iPhone 4 and iPod Touch 4G users will be happier with the OS 4.2 announcement. Now they don’t need to spend an extra amount for buying the MobileMe phone tracking service. The new Find My iPhone feature introduced in iOS 4.2.1 firmware will do it for free.