All iPhone boxes include an instruction document, Dock and USB connection port and AC charging socket. The first generation iPhone and iPhone 3G also come with a cloth for cleaning the screen. In addition, it also includes a stereo headset with a microphone, and an upright plastic dock connection port for charging and synchronization; iPhone 3G includes a headset similar to the previous generation, plus a SIM card eject tool (No. A paperclip required for the first generation of iPhone); iPhone 3GS has a SIM card eject tool and improved earphones. Unlike the previous earphones, a button for volume control has been added. iPhone 3G and iPhone 3GS use the same dock connection port, but unlike most mobile phones, the charging socket and USB connection port can be sold separately, but not the dock of the first-generation iPhone. The wires of the USB connection port and the charging socket are the same wire. The iPhone 3G and iPhone 3GS with ultra-compact USB power adapters are sold in North America, Japan, Colombia, Ecuador and Peru. All iPhones include a USB power adapter, or charging socket, which allows the phone to be charged through an AC charging socket. In 2012, Apple’s iPhone random accessories are as follows: iPhone, iPod Touch and iPad all operate the iOS operating system (formerly known as iPhone OS) developed by Apple, which is a variant developed by the core of Apple Darwin, and the program is also It can be found in Mac OS X and also included in Mac OS X10.5 Leopard's 'Core Animation' software component, which is responsible for providing smooth animation effects on the user interface. If it works with PowerVR hardware (iPhone 3GS requires OpenGL ES 2.0), it is responsible for operating the interface action screen. System operation is less than 500MB. It can support applications bound from Apple, as well as applications developed by third parties. The software of the application cannot be copied from Mac OS X, but must be specially written and compiled for iOS. Apple did not explain the actual difference between the Mac OS X and iPhone interfaces, but the processor ARM used by the iPhone is different from the x86 or PowerPC processors used by the Mac OS, so the two are not compatible. Third-party applications have been used in Safari. It runs in a controlled environment, but the App Store launched by Apple in 2008 allows users to easily download third-party applications. They tend to provide a smoother update of the iPhone operating system, similar to Windows Update and Mac OS. Compared with other mobile phones, the update methods of X and iPod have the advantage of attracting customers. Just like the iPod, the iPhone can use iTunes to manage and exchange files from a computer. Music, short videos, applications, and e-books can also be exchanged through it. The earliest version of the operating system requires iTunes 7.3 or later, compatible with Mac OS X 10.3.9 Panther and later, and 32-bit Windows XP or Windows Vista. iTunes 7.6 version has been discovered to find a way to support 64-bit computers, and has been extended to support 64-bit Windows XP and Windows Vista. Apple allows iTunes to provide updates for the iPhone OS for free and major updates with new models. These updates usually require a newer version of iTunes to be upgraded — for example, iPhone OS 3.0 requires an update to iTunes 8.2 — but the system requirements of iTunes are unchanged . The content of the update includes fixing vulnerabilities, security patches, and adding new features. For example, iPhone 3G users experienced 'disconnected' conditions at the beginning, and the situation improved after the update was downloaded. IPhone OS 3.1 requires iTunes 9.0 update, while iOS 4 requires iTunes 9.2 version. iOS 5 requires iTunes 10.5 to activate and synchronize. It also requires Mac OS X 10.5.8, or the support of a computer with 800 MHz G4 or G5. Mac OS X 10.3 to 10.5.7 is no longer supported.