iOS 7.0.4 updates are available for iPhone, iPad, iPod touch. You can download the updates from iTunes as well as from OTA (over the air). Apple also release the update of iOS 6.1.5 for fourth generation iPod touch. The iOS 7.0.4 is just 17 MB and it will take hardly 10 minutes to install.
According to apple iOS 7.0.4 will fix the issues related to FaceTime calls. Some users were facing the problem in FaceTime calls, in previous version of iOS. iOS 7.0.4 also include the update related to security, updates will fix the issue of insufficient authorisation of app and in-app purchases. In this type of issue user was able to complete a transaction without providing a password, who was already singed in. In iOS 7.0.4 this is solved by using the “additional enforcement of purchase authorisation”.
For download the iOS 7.4.0 follow the below process:
Settings > General > Software Update, iOS will automatically download updates. This will works only for iPhone 4 or later, iPod touch, iPad 2 or later, running iOS5 or latter. After completion of download, user will get a notification to install the updates.