So you’ve heard about “jailbreaking the iPhone” before but you’re not sure exactly what it is and why you should do it. Maybe you don’t see the benefits of it. Maybe you don’t think you have the technical skills to do it.

While this post will be useless to jailbreak veterans, it should be helpful for new iPhone users eager to learn more about jailbreaking…

In short, jailbreaking is the process by which a user is given access to read/write access to otherwise locked files on the iPhone. Unlike what people might think, jailbreaking is fairly easy and safe.

We’ve talked quite extensively about jailbreaking before, so instead of rehashing what we already said, I figured it would be better to send you to various articles about this topic:

These few articles should cover everything you need to know about jailbreaking. If you have additional questions, please feel free to ask in the comments section below, or in our forums.

  • Dan

    I have a question that needs answered. I use about 25GB a month of data and just wondering I’f AT&T will limit my data one way or another.
    Please reply

    • I’m not sure I understand your question.

      There are 3 different data plans with AT&T:
      – the unlimited data plan (for people who got their iPhones up until a few months ago)
      – the 200 MB plan
      – the 2 GB plan

      If you are on the unlimited data plan, then no, AT&T will not limit you. If you are on one of the 2 other data plans, AT&T will not limit you, but they will charge you extra if you go over your limit.

      Hope that answers your question.

  • James

    Under ‘How to jailbreak’ there is option for 3GS on iOS 4.1 with Pwnage tool but none for 3G – only Redsn0w. Is it not possible to JB a 3G on 4.1 and preserve basebamd?

    • Yes, using PwnageTool, assuming your 3G is currently on iOS 4.0.1 or less

      • Z

        I thought apple stopped updating 3G baseband

  • Abhishek

    Thanks for the info. When it comes to knowing about jailbreaking, one main doubt I have is whether jailbreaking voids the warranty. Some say it does while others say a previously jailbroken phone which is restored still has valid warranty. Any thoughts? Thanks

    BTW, I have a jailbroken 3GS 🙂

  • It does void the warranty but if you ever have to take your iPhone back to Apple, simply restore your iPhone in iTunes and it will be like new, and there’s no way they’ll ever be able to tell if you jailbroke or not.

    • Moi

      Hi Sebastien,

      I’m running with 4.1 on my G3S.I know that no way to unlock it since i did not save my baseband.My question is:Do you think that an Unlock application will be released someday or there is no hope and i’ve to put my device in a drawer since i can not use it as phone.Thanks

      • I’m sure that you’ll eventually be able to unlock. Stay tuned!

  • Monkey

    hahahaha, why asking Sebastien when AT&T is your service provider. Dial 611 on your phone and ask the customer service to see which plan you have

  • SpideyRules

    “30 reasons to…” really needs to be updated. Many of the features listed are now available with the latest iOS, making it more like “20-25 reasons to JB”…

  • ydr

    unfortunately when i jailbroke my iphone 3g a while back both phones I jailbroke became slow and it was hard to do tasks in the real world when i needed the responsiveness, that has kept me from jbking this new one.
    ps. im mad i didn’t win the case.

  • Jared

    I was more than a little dissapointed with my last jailbreak with Pwnage. Not knowing if it was the jailbreak itself or a combination of the jailbroken apps that I loaded but it was slow and ate the battery and jumped into safe mode more than I would like. Having to respring

  • Jared

    But. As I was sayig. I now have an iPhone 4 jailbroke with limera1n and it is factory unlocked (prevoiously mentioned was unlocked through ultra). And this one did not need to have a push fix nor tube fixed etc and it stable and not crashing. Yet? Really happy with this jailbreak. So if you are wondering. This jailbreak is really working well. And the reasons to do it are even greater with the new applications and abilities of the iPhone 4. 🙂

  • Jared

    Previous version that I had JB and ul was a 3GS running 4.0.1. Just as a point of reference. That is all. Promise. 😉

  • Osc

    I want to update to 4.1 when I hook it up to iTunes and it upgrades then I have to jailbreak again will all my cydia stuff be put back on my iPhone 4

    • GREENONE

      Nope, what Cydia needs to run will be put on your phone (essential upgrades) but anything you put in, you will have to redownload over again. Write them down or take screen shots. Also I might add, what u download might not work, where as others will work like usual. It’s all part of the jailbreak. Enjoy!

  • Tabby

    ever since I have jailbroken my 3G seems to lag alot and it also doesn’t always load my iPod. I’d say about 75 % of the time it doesn’t load. I’m wondering if I did something wrong with the jailbreak. It’s frustrating. Any ideas or suggestions?