. Everyone may know that the iPhone can be jailbroken, but what is the jailbreak, what can be brought to us, why must we jailbreak, whether it can not be guaranteed after jailbreak, then today Xiaobian gave Let's answer in detail what is jailbreaking! Apple has a lot of restrictions on the operating system on its devices, and jailbreak means bypassing these restrictions so that it can "root access" the underlying operating system. The main purpose is to open the user's operating permissions, so that users can freely erase the running status of any area. Only after the successful jailbreak, the iPhone's file system is in the readable and writable (rw) state, and can install and run third parties that are not officially certified. Programs, plugins. In a literal sense, it is like a prisoner who escaped from a deep prison prison and gained freedom without restraint. The software is usually rejected by the Apple Store for some reason, often because they violate certain Apple regulations. Therefore, the jailbroken iOS device will lose Apple's official warranty rights. But Apple really knows that we are jailbroken about our devices. The answer is of course no! That is to say, on the other hand, we only need to update or restore the system when your device needs a warranty. In order not to jailbreak, that is, at this time, you can enjoy the warranty policy! Here are some of the advantages and disadvantages of jailbreaking and not jailbreaking. The advantages of jailbreaking are: 1. Power saving. 2. The system is relatively stable. 3. The software installed and installed in the apple store is highly compatible. 4. The downloaded and installed software (ipa format) in the apple store will not leave redundant system junk files after deletion. Disadvantages: 1. Calling, SMS display attribution, SMS receipt, flash and other system-level software, not jailbreak on iphone can never be achieved. 2. System permissions are very low. For example, we can't delete the system's program, we can't modify the system files and settings, we can't encrypt a program, we can't send files with Bluetooth, etc. …… and third-party software can't be implemented. Why? App developers want to be on the App Store, and their work must be approved by the Apple App Store. 3. Only install free programs, fast-running programs or software that is paid for download in the App Store. Unable to install software without an account certificate (such as .ipa, pxl after piracy). 4. Personalized programs such as themes and icons cannot be replaced. 5. It is not possible to download files directly in the browser using the mobile phone and manage the files of the mobile phone. Advantages after jailbreak: 1. The system has high authority, you can optimize the system yourself, you can modify the system files. You can install more software with high system privileges to achieve more advanced features! For example: sending files with other devices, SMS receipts, call attribution, outgoing calls, file management, browser download plug-ins, flash plug-ins, content management, and more. 2. You can change the theme, icon, SMS ringtone, etc. to create a personalized mobile phone. 3. Flexible management of systems or other files with third-party file management software. Think of the iphone as a mobile hard disk (u disk). Disadvantages: 1. Power, after the jailbreak, the system will always live some processes to maintain the state of jailbreak. Depending on the number of system-level software (deb format) installed, the power consumption rate after jailbreak is increased by about 10% to 20%. 2. It may cause system instability, and with high system privileges, we are also accompanied by the danger of system crash. Can you understand this? You can modify it, but you can't guarantee that it will be modified correctly forever. Therefore, system-level software is in short supply, and you should not install it without knowing the purpose. 3. When the new mobile phone firmware version comes out, it cannot be updated in time. Because each new version of the firmware will fix the previous version of the jailbreak vulnerability, making the jailbreak invalid. And Apple's iOS firmware can only be upgraded and cannot be downgraded. Therefore, if you need to maintain the function after jailbreak, it is best to wait for the new jailbreak program to be released before you can officially upgrade the corresponding phone firmware version. 4. A small bug occurs during the jailbreak process, but it does not affect the normal use. 5. When using some cracked plugins, there will be white apples or system instability, it is recommended to buy genuine plugins. Third, the common point 1. The free or purchased fee-based software downloaded from the apple store can be installed and will not be affected. 2. Will not damage the hardware, jailbreak will not change the hardware on any phone. In a word, jailbreak is good or bad, choose according to personal preferences! Xiao Bian recommended "the use of fruit powder must know the skill" This article comes from [system home] www.xp85.com