Jailbreaking Myths and Facts.Battery Jailbreaking will not have an impact on your battery life, despite all the chatter. What has an impact on your battery life is what you install when jailbroken and what time-saving or cool tweaks are currently running. There are a bunch of fun and useful tweaks on Cydia and it is definitely worth trying them out! Just be aware that everything is okay in moderation. Any tweak that is always running and modifies your device is taking a bit more power than a stock device would. This difference is not great at all, unless you have your entire device modified using multiple tweaks. Don't be afraid to install all the weeks your heart desires, just be aware. Once you start to notice a change in battery life, this may just be your limit. If you are comfortable with the change and it doesn't have an impact on your usage throughout the day then by all means, continue. It will not harm your device in anyway. Usage Jailbreaking will not have an impact on the usage of your device. As with battery life, it is what you install that impacts your usage. The more constantly running tweaks you install, the more RAM will be used. With less RAM, you will notice lag or even crashes. On a newer device such as an iPad 3 (The new iPad), tweaks aren't something to really worry about unless you go on a package frenzy and install every tweak you see. Again, just be aware and when you notice that your device is getting too slow for your liking, just uninstall packages that are not required. Damage Jailbreaking or installing packages will in no way harm your device. At worst, you will run into a problem that cannot be fixed by any means other than performing a restore in iTunes. This is not likely unless you do not do research first on what you are installing. Always install from trusted sources you know are safe. Also, regularly back up your device in iTunes or iCloud to ensure that if you do need to restore you can always get all of your information and settings back. Legality Jailbreaking itself is legal, but what you will do with the jailbreak will hold you and only you responsible for the legality of your actions. Installing paid App Store apps without paying for them is illegal, as is installing Cydia tweaks that are paid for free. If you know what you are downloading and installing costs money and you are obtaining it for free, unless through a trial, it's illegal. Stay legal and have fun with your jailbroken device. Warranty Jailbreaking will void your warranty. If you have a heavy conscience and don't want to void your warranty, then don't jailbreak. It is your moral choice. However, you can simply restore your device in iTunes and go back to a stock firmware. After that, you can go to Apple and they will never know your iPhone was jailbroken. If you are a little nervous as to whether you restored correctly, just ask for some help on our forums, but it really is just as simple as restoring to a stock firmware. Simplicity Jailbreaking is very simple. Even with no experience, we all started with none! Don't be afraid because you can't damage your device. There are many helpful threads with different tutorials here on iFans and many, many users that can walk you step-by-step through the process and errors you may be having. That's what we are here for, to help. FAQ: What is the purpose of jailbreaking? Jailbreaking allows you to install third-party applications, tweaks, mods, themes, useful utilities, and other content (called "packages") from Cydia, which is the jailbreak equivalent of the App Store on iOS. Jailbreaking essentially allows for you to further customize and enhance your iOS device beyond the limits that Apple imposes. Apple has gone to great lengths to prevent you from running unauthorized apps on your device, and for several reasons; the most important is for security. Since jailbreaking is designed to let you run those apps, that means that in order for the jailbreak to work, several of those security measures are simply shut off and disabled. This does not mean that you'll automatically get viruses and have your data stolen, but it does open up more avenues for hackers to gain access to your data. You simply must be more vigilant and attentive about security when your device is jailbroken. Can I brick my device while jailbreaking? No, you cannot brick your device while jailbreaking. The only way to brick your device is if you are an advanced user and purposely try to brick it. Don't ask how, we don't want you going around bricking people's devices. Can I still use the App Store when jailbroken? Yes, your device can function normally and take advantage of all of Apple's original features while jailbroken. What is the legal status of jailbreaking? Jailbreaking is officially declared as legal in the United States, based on an exemption made to the U.S. Digital Millenium Copyright Act (DMCA) allowing for modifications of this nature. Nevertheless, by jailbreaking your iOS device you are violating the End User Licensing Agreement (EULA) with Apple, which means that your device's warranty will be void. By restoring your device back to factory default settings using iTunes, however, all traces of jailbreaking will be removed and your warranty will essentially be valid again. Do I need to be running a freshly installed version of iOS to jailbreak? Will my content be erased? You do not need to be running a newly installed copy of iOS, and your device's media and settings will not be affected or removed by the jailbreaking process. Backing up your content to iTunes or iCloud, however, is still recommended as a precautionary measure. Can I update my device when a new version of iOS is released? The exploits used to enable jailbreaking are usually patched in the next update of the OS. This means that, if you want to keep your jailbreak mods, you will need to wait for the iPhone jailbreak development community to release an updated jailbreak procedure. Sometimes this takes hours, sometimes this takes weeks, months. Once the jailbreak is released, updating generally consists of backing up everything, restoring your device to the new iOS, re-jailbreaking, and reinstalling all of your jailbreak software. It is a far more involved process, on top of the already involved update process of the iOS. You will likely update the OS far less often than you would if you were non-jailbroken. What's the difference between an untethered, tethered and semi-Tethered jailbreak? Tethered Jailbreak: A Tethered Jailbreak needs to be plugged into your PC or Mac over USB, and you typically need to re-run your Jailbreak utility — like redsn0w — and choose the “boot tethered” option to restart your device. You will not lose any data. Untethered Jailbreak: An Untethered Jailbreak can be rebooted any time, anywhere, without having to connect to your PC. It works just like a non-Jailbroken device. Semi-Tethered Jailbreak: A semi-tethered jailbreak allows you to start your iDevice without plugging it into your computer, however you will not be able to use your jailbroken addons until you boot from your computer using the jailbreak program. How do I know if my device is tethered, untethered, or semi-tethered jailbreak? Tethered Jailbreak: After jailbreaking, you will notice your jailbreak utility will advise you to use a tethered boot method. There may also be a warning if you read the front page of iFans.com. Now this does not become a tethered jailbreak until Mobile Substrate is installed. Until then it is a semi-tethered jailbreak. Untethered Jailbreak: If you are not advised to use a tethered boot and you have a fully functional jailbreak with Cydia working after a reboot. Semi-Tethered Jailbreak: A semi-tethered jailbreak is a "tethered jailbreak" that does not have Mobile Substrate installed. I don't need fancy things; what can jailbreaking do for me? Jailbreaking still may apply. There are useful packages such as biteSMS, which allows you to extend your text messaging features to having contact pictures in your conversation to being able to quick reply or compose from any app, even your lockscreen! Never leave Angry Birds again to just reply to a text message. Also, you can use programs such as iFile to manage media or even take over your music app by making a dedicated music folder in your file system that doesn't require iTunes. You can even manage media from your device yourself by using multiple apps together.Jailbreaking really is a collection of time-and-energy-saving features. Try it out for yourself and see what it offers before thinking that jailbreaking is not for you. By 42395_skyline, tinyman392, ValleyForge, Tkf1 Thanks to Jesse402 for a bunch of corrections!