What is Jailbreaking an iPhone?
If you have got an iPhone and you are confused by the term Jailbreak iPhone, please read on. Jailbreak must not be taken literally when it comes to your iPhone. To jailbreak your iPhone actually means to free it from the limitations imposed on it by its manufacturer (Apple) and carrier (e.g. AT&T, Verizon, etc.). So you must not be terrified to come across this term in case you are new to the world of Apple or iPhone. After a jailbreak, the device can do things it failed to do before like installing unofficial apps and changing settings and areas of the device that were limited earlier. Jailbreaking basically works by when you install a software app on your PC and then having it transfer some instructions to the phone so that it can "break open" the file system. With a jailbreak you get a collection of tools that allow you to change what could not be changed otherwise.
Why Jailbreak iPhone?
Jailbreaking iPhone is important as it allows you to do all from customizing the look of your device to installing third-party apps that are titles not authorized and available in the App Store. A third-party app can add numerous functionality to your iPhone which you'd never see through the App Store if you don’t jailbreak.
On a non-jailbroken iPhone app developers are not permitted allowed to change few parts of the OS. However, when the OS is completely open to developers working on jailbroken apps it possible to find apps that can redesign stock apps entirely such as Messages, add widgets to the lock screen, etc.
Considering how far you want to go, it is possible to even more than that. Jailbreaking even allows you to unlock your device so you can use it with a carrier besides the one from which you bought it.
Why you may not want to Jailbreak your iPhone?
When you jailbreak your phone, you are on your own completely as you may void the warranty you have with your carrier. So if something terrible happens to your device, you can't rely on AT&T, Verizon, or Apple to solve it.
There are various users who report an unstable or completely disabled phone once they jailbreak. This is another reason why you may not want to do jailbreak. Your iPhone may become nothing more than a costly paperweight! This is because there isn't as strong of a standard for app development like there is with the official App Store apps, you might install various customizations that end up crashing your device or slowing it to a crawl. As developers of jailbroken apps can change core components of the device even a small change to an essential or sensitive setting may destroy the software completely ruin the software.
Is it possible to fix my iPhone if something goes wrong?
According to some users, they were able to connect a malfunctioning iPhone to iTunes and restore it to its original settings that helped it get over the issue. But others have been left with a broken iPhone which does not respond or will reboot continuously. Different users report different experience but it is important to keep in mind that you probably can't count on AT&T, Verizon, or Apple to offer you suport once you've made this move.
Is jailbreaking your iPhone legal?
The legality of jailbreaking your iPhone, iPad, etc. at times changes as new laws are placed and the rule is not the same in all countries. You can find the legality of jailbreaking in your country on the iOS Jailbreaking Wikipedia page.