IPhone Operating System (iOS) device applies iOS as its operating system, which includes Apple products, such as iPhone, iPad, iPod Touch and Apple TV, etc. With rapidly and widely popularizing of iOS devices, the requirements and use of iOS device becomes more and more.
After softwares are distributed, generally the softwares are required to be modified and updated constantly. After being modified or added with a new function by a software developer, the application is released in the form of patches. A user updates those patches, i.e. modifying and updating is accomplished. Software modifying or updating is for satisfying requirements of users and avoiding virus attacking better.