The Difference Between Jailbreaking and Unlocking

By , Jul 10, 2009

There is a lot of confusion among noobies about jailbreaking and unlocking. One of our readers recently asked for a clear “non geeky” definition of both terms.

If you already know the difference between jailbreaking and unlocking, this article might not be very helpful to you but you may still be able to give us some insights or maybe add your comments and suggestions. If you don’t know what jailbreaking or unlocking means, then read on because you’re just about to get a crash course on iPhone hacking…

What is Jailbreaking?

Definition of Jailbreaking

Jailbreaking is the process by which an iPhone firmware is modified to allow unsigned code to be run to gain access to files that Apple wouldn’t normally let you access. Jailbreaking adds unofficial application installers to your iPhone such as Cydia or Icy (I personally only use Cydia), which let you download many 3rd-party applications previously unavailable through the App Store.

Is Jailbreaking Legal?

Update: Jailbreaking is now officially legal in the US

Yes and no. The legality of jailbreaking is very unclear. Most iPhone owners including myself think that since we own the iPhone, we should be able to do whatever we want with it.

Apple’s lawyers think differently as they consider jailbreaking to be a violation of copyright. I had a phone conversation with Apple’s copyright attorney about a year ago and he admitted to me that they are not capable of going after every jailbreaker out there… To these days, I don’t think anyone has had legal issues with Apple due to jailbreaking.

Why Jailbreak Your iPhone

Jailbreaking lets you install applications that are not approved by Apple. Many of these applications can be very helpful but they will unfortunately never make it to the App Store due to Apple’s restrictions. There are many reasons why you would want to jailbreak your iPhone:

  • install 3rd party applications rejected by Apple for various reasons (ie. nudity)
  • video recording (now available on the iPhone 3GS)
  • changing the look and feel by installing custom graphics and themes
  • free tethering
  • get access to cracked App Store apps for free (not endorsed by me, but still worth noting)
  • be able to unlock your iPhone

Why Not Jailbreak Your iPhone

I can only think of one reason why you wouldn’t want to jailbreak. Jailbreaking your iPhone automatically voids the warranty. This is not really a problem as you can always restore your iPhone in iTunes, putting it back to its factory settings. This will make it impossible for Apple to see you jailbroke your iPhone, thus not voiding your warranty.

In the past, some jailbreak methods were not very stable and sometimes turned your iPhone into an iBrick aka an expensive paper weight. Jailbreak methods are now very stable and I have yet to hear about someone bricking his iPhone while jailbreaking. In other words, jailbreaking is safe!

How Do I Jailbreak My iPhone?

I wrote many tutorials on how to jailbreak your iPhone, depending on what iPhone and what firmware you have. Check them out, follow the instructions, and have fun. You don’t need to have a PhD in computer science to jailbreak your iPhone. It’s very simple and straightforward. If you can download 2 files and click “next” when prompted, then you can jailbreak your iPhone.

What If Something Goes Wrong?

It’s very unlikely that something will go wrong… If you have a problem, simply plug your iPhone to your computer, launch iTunes, and click “restore”. As I mentioned above, it will restore your iPhone to factory settings.

Why Are You Still Reading This?

What? You’re still aren’t sure about this whole jailbreak thing? You’re missing out big time. An unjailbroken iPhone is a plain boring iPhone! Jailbreaking is the best thing that has happened to my iPhone and I seriously can’t live without it.

What Is Unlocking?

Definition of Unlocking

Unlocking is the removal of SIM restrictions on the modem, allowing the use of the iPhone on any carrier. There are 2 types of iPhone unlocks:

  • software unlock: the iPhone is unlocked by a software
  • hardware unlock: modification have to be made to the actual hardware to unlock the phone

Software unlocks are safer because they do not modify your device and can easily be reverted back. Soft unlocks are mostly developed for free by the Dev Team, an international group of iPhone hackers. Hardware unlocks are a little tricky and usually cost money. In clear, if you want to unlock your iPhone, you can do it for free by with a safe software unlock.

Is Unlocking Legal?

According to Wikipedia, “unlocking a phone without the permission or unlocking code from the provider is usually in breach of the agreement with the provider, though most countries do not make specific laws prohibiting the removal of SIM locks. In the United States the DMCA formerly was claimed to criminalize unlocking. However, an exemption that took effect 27 November 2006 specifically permits it.”

Why Unlock Your iPhone

The main reason to unlock your iPhone is if you want to use it with a different service provider (ie T-Mobile). An unlocked iPhone also has a better resell value.

Why Not Unlock Your iPhone

If you’re good with your phone carrier and will not use your iPhone internationally, there is absolutely no reason for you to unlock your iPhone.

How Do I Unlock My iPhone?

Before unlocking your iPhone, you will have to jailbreak it. The unlock can either be done from a computer, or directly from the iPhone. Check out my iPhone unlock tutorials for step by step instructions.

What If Something Goes Wrong?

Although unlocks can sometimes mess up your settings a little bit, they are constantly improved to fix errors and bugs. If something goes wrong, you can always restore your iPhone to factory settings.

In Short…

I case you’re still not really sure you understand the difference between jailbreaking and unlocking, let me put it in very simple words. Jailbreaking an iPhone means that 3rd party applications can be installed on it (ie. apps from other developers than Apple). Unlocking an iPhone means that any SIM card can be used on it.

If you have questions or anything you want to say, feel free to leave a comment below or start a new conversation in the forum.

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  • zia

    Sebastien

    i jailbreak to my iphone 3g 4.0 firmware by your tutorial. its works good but when i download screensplitr to my iphone that icon doesn,t comes on. and if i want to connect with tv to see the display of my iphone it doesn,t work. please help me what to do. and which king of composite cable i should bye. one dealer said me that your cable will not work in 4.0 firmware
    so what i should downgrade my iphone to 3.1. some suggestion please as soon as possible

  • mohammad

    Hi Sebastian,
    Thanks again for your great website.

    Can you unlock an IOS4?

    If not can you downgrade it and then unlock it?

    Are all iPhones unlockable?

    If not, how could you find out, could you find out before purchasing it?

  • matts

    I am just looking for some clarity: If I jailbreak my iphone, all the functions and syncing are unchanged. But if I need to restore my factory settings, I can backup my device, restore the factory settings, then restore all my apps (itunes only), music, images, contacts, etc., and have a “legal” iPhone? Thanks for the help!

    • http://www.iphonedownloadblog.com Sebastien

      @Matts Yes

  • JB

    I have a jailbroken and unlocked iphone 3GS 3.1.2, The battery ran out and when I recharged it, it got restored to the original service provider. I had also upgraded itunes to 9.1 version. Every time I power on the iphone or connect it with my mac, I see the pic of usb connecting to itunes. When I do that, it asks for upgrading, when I do that, it says my sim is no supported. I downloaded blackra1n and tried jailbreaking, the same result as above. it says I have unsupported sim. I am stuck. PLEASE HELP ME JAILBREAK AND UNLOCK AN ALREADY JAILBROKEN AND LOCKED IPHONE 3GS 3.1.2.
    THANKS
    JB

  • azimul

    I am really a novice from Bangladesh. Did not have any idea what is jailbreak or unlock. Recently I bought a iphone 3GS (firmware 3.1.3) from a guy who bought it from Canada. It was in a sealed packet and when I opened it found inside there is a Rogers SIM and when I have put my SIM inside it said my SIM is not valid.
    Then one of my friend took the phone to Singapore and got it in working condition. He told he paid USD 100 to a Apple retailer and got it unlocked. I was very happy but alas my happiness did not last long when i upgraded the OS to OS 4.0.1 now it showing “SIM Failure or invalid SIM”

    Can any kind heart gentleman advice me what can I do now???? I have already spent USD 800 and not able to use the phone.

    Thanks in advance

  • Mike

    Sebastian,
    you seem to be the authority on this topic, or atleast in this forum. I currently have a 2G running 3.1.3 and would like to jailbreak and unlock it. What do you suggest? ultrasnow?

  • Mike

    Sebastian,
    you seem to be the authority on this topic, or atleast in this forum. I currently have a 2G running 3.1.3 and would like to jailbreak and unlock it. What do you suggest? ultrasnow?

    Thanks
    -mike

  • Sandi46

    Thanks for the information.

    I just ordered an Iphone4 from the UK. I was wondering do you have jailbreak links for iphone4?

    Many thanks

  • Ben

    I bought my iphone 2G ages ago from ebay. It came unlocked and jailbroken (if thats the correct term?). Has always worked well but i have never been able to upload any apps to it despite buying them legitimately from itunes and trying to sync. I’ve always wanted to update the firmware in hope that I could sync my apps across along with my music but have never known if this would lock it all up again and render it useless so i’ve just avoided it. Can anyone help me get apps on this thing?

  • caro

    Hi, I am thinking about getting an iphone, probably in the US and bring it to my country, so, if the iphone is unlocked that means I can use any sim card in my country?
    By the way, if your iphone is jailbroken, can you still sync with itunes?
    What about the apple updates?

  • Cpaw

    Hey I liked the article but I hav an iPod touch 2g 4.0 can jailbreaking and unlocking work for me too?

  • hahahahahahahahahahahaha

    can u get any app for freeeeeeeeeeeeeeeeeeeeeeeeeeee even the ones on the app storeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

  • varun

    I have a question: I know that i have to jailbreak my iphone 3G before unlocking but when i want to unlock it what is the best software to use?

    Would i have to pay At&t extra money for unlocking the phone when i have a contract with them?

    Thanks,
    Varun

  • Glitter

    I unlocked my iPhone 3G so that I can use SIM with wifi and no data package. The phone and texting work fine, but I lost voicemail capability. Does anyone know a fix for this? Thanks!

  • Glamiskid

    Wow, that i didnt know. kewl stuff, also jailbreaking is 100% NOT ILLEGAL! It is your property you do what you want with it. It however is illegal if you use it to buy 1st party apps( created by Apple) for free (i.e. Angry Birds, Doodle Jump), but everything else is cool.

    I Love iPod!!!!!!!!!!!!!!!!!!! :) =) =-) -Y <3-

  • http://www.hoang.com Hoang Anh lam

    cydia

  • http://www.hoang.com Hoang Anh lam

    iphone

  • Jason

    I have read the entire blog and will ask a question I have not yet seen asked or answered. I have an iPhone 3G with OS 4.1 firmware 5.14.02 which as of today(9/22/10) cannot be unlocked. Can one roll the firmware back to a previous version (which can be unlocked) and then successfully jailbreak and unlock the phone or do I have to wait until Team Dev comes out with the unlock for OS 4.1 on the 3G?

    • http://www.iphonedownloadblog.com Sebastien

      While you can downgrade the iOS, you cannot downgrade the baseband, so no, you can’t downgrade to unlock.
      More info about downgrading your iPhone here: http://www.iphonedownloadblog.com/downgrade/

  • Karin

    Hello I have a question I have an iphone 4 which has 4.0.2 version and I’m wanting to jailbreak and unlock it but guess it’s not available yet and when I looked on your site it says probably not because their will be one for 4.1. Do you know when their will be a jailbreak for 4.0.2 or 4.1? Please email me back and let me know. Thanks.

  • http://prokillerzposse.webs.com nicholas da haxor

    DONT USE FU****** BLACKRA1N!!! Use Spirit!!! it takes less time and is a lot more stable i.e. YOU CAN STILL UNLOCK WITH SPIRIT NO MATTER WHAT… Blackra1n messes with the unlocking programs.

  • BENSON ABRAHAM

    Greetings Gentlemen,

    I need your advice. I am located in Saudi Arabia & one of my colleagues is planning to get me an iphone 4G from AT & T. I dont think AT&T sells unlocked iphones; which means that he will have to buy it with a contract. Can we Jailbreak and unlock the iphone when he brings it here even if it is under the contract with AT&T ? Does any one have a proven site for unlocking Iphone 4G.

    I am a little new to the iphone world as i am shifting from RIM (BB).

    Your suggestions would be welcome.

    Regards,
    B

  • Robert

    Sebastien… very informative advice you provide.
    Question… have a 4G I use in the US, but also have a prepaid account/contract in the EU with T-Mobile with a dedicated SIM/phone number. Any issues unlocking US 4G and using my EU SIM/ contract on the unlocked US 4G?

    Thanks.
    Robert

  • Ali Yar Khan Durrani

    Hi there…. I WANT TO BUY IPHONE 4…. SO KINDLY TELL ME THAT SHOULD I BUY THE SOFTWARE UNLOCK OR HARDWARE UNLOCK?? IS THERE ANNNNY DIFFRENCE IN BOTH OF THEM OTHER THAN MENTIONED ABOVE AND IS SOFTWARE UNLOCKED RELIABLE?? PLZ GUIDE ME??

  • AshuPashu

    Sealed iPhone 4G for sale(60 pieces) delivery all over the World.Just call 0194-2436703 29%Off..INR 14,029

  • John

    Hey Ladies,
    Just a question i had, can i turn off 3G after i download ultrasn0w or after. What is the difference?

  • Eric J

    Hi there & sorry if this is a repeated question as i could not find the answer. My iPhone 4 came with 4.1(8B117) & with firmware (02.10.04) from carrier A.

    So if i Jailbreak this phone now, will it or how will it impact my existing carrier A SIM as that is originally not locked?

  • Dody

    nice man ….very good tutorial …very detailed explanation and point to point .
    thanks mate !
    Cheers .

  • LeonThePC

    Where is the best place to find Apps not available on the iTunes store?

  • http://www.unlockuriphone.biz jailbreak

    Why i can’t jealbreak my iphone?

  • itsMe

    How nice of Sebastien to help me in finding out about iPhone!

  • elemment

    So if my iphone has been jailbreaking, can it powered off and turned on again?

  • ampy

    Need some help…
    I have a iPhone 3G running iOS 3.1.3. I want to jailbreak & unlock to use as phone but should I update to most current iOS? Need help figuring out if this is worth or not.

  • Mittul

    hey i have a question? iphone is selling unlocked phones in aus and many other countries. If i buy an unlocked iphone 4 from Australia and use it in India, is there any kind of issues in that.?

    iphone 4 is not yet launched in India.. thts y..

    • http://www.iphonedownloadblog.com Sebastien

      No you shouldn’t have any problem, if you buy a factory unlocked iPhone

  • LeonThePC

    After I jailbreak my iPhone, where is the best place to find Apps not available on the iTunes store?

    ???????????????????????

  • Felipe

    oo amigao blz?! onde eu axo o cydia e o prog q faz o jailbreak??

    valeo forum bacana!!

  • Felipe

    oo friend blz?! where I think the prog cydia and q is the jailbreak?

    nice forum! thank

  • Oliver

    Hey guys i have iphone 2g(3.1.2)…and i have on my computer itunes 9.2 and many cracked games and apps…when i try to sync any games..itunes says : the application “xxx” cant be installed to the iphone “xxx” because it’s not signed..any help please ???

    NB: I Jailbreaked my iphone with SPIRIT and the same problem continues
    and i tried Blackra1n and the same problem continues
    i tried to deauthorize and reauthorize my pc and no answer…

    Help Me Plz

  • Rjb

    I have an iPhone 4 with firmware 4.1 and baseband 02.10.04. Can I Unlock it from AT&T so I can use it here in the UK?

  • lyle

    my daughter thought her i phone was stolen so got a new one on insurance later found the old one so she gave it to me can i use it as a phone or will it flag up as stolen

  • JBKLANK

    Hay just wondering, can i still get all the same features and stuff your talking about with an itouch 3g? i know you cant unlock it but can i get all the same apps and stuff from jail breaking with Jailbreakme.modmyi.com if so great and i also recommend that web site for it jail breaks it right off of the device it self and only takes a few min. it also instantly installs Cydia, you have to manually install other apps through cydia such as the new app store for the cracked apps. i don’t remember the code or the stuff you have to type in to get it, i haven’t had an iphone for a while, i also don’t remember the jailbroken app store name, if you could please help me with that? thnxs! P.S. you will also need to get winter board if you want to get all the cool themes and styles. and if you wish to be able to run backgrounding apps (say you were playing tap tap revenge 3, you wanted to go to mssging, you can close out of the app and when you open it back up it will still be in the same place you left it Ex. the pause menu in the middle of a song. so you can continue with out losing any progress.) if this is any help your welcome and i hope someone can answer my question soon before i get my itouch!

  • JBKLANK

    @lyle: im most certain it would show up as a stolen phone, not completely sure on that, but i dont recommend it without consulting your provider that you have found it, it would save a lot of time and save you from being acused of stealing an iphone. plus when you get a replacement phone they deactivate the old one, and if you dont have your sim placed under a smart phone, when you put it in the iphone you will instantly be charged the extra $30.00 a month and they would think it was stolen and deactivate your # or give you a call telling you about the charges. hope i was of any help :)

  • JBKLANK

    http://jailbreakme.com this is the website if anyone wants to try it go to it on your iphone/ i touch and follow the step by step instructions. ;)

  • Lola

    Help!!

    While synchronizing my iphone, something bugged and my phone crashed. Now, I can only turn it on on restoration mode and I-Tunes want to restore my phone to factory settings which I think means that I will loose everything that is inside, including 500 photos…
    Can I do anything to get my data back, could jailbreking my phone help me with this???

    Thank you for your help!!!

  • Jim

    Help Needed.

    I have Iphone 3gs which is unlocked, can I upadate it to OS4?
    if yes, do I need to unlock it again?

  • NiX

    One thing is not clear to me. I have an iPhone 3GS (old bootrom) with baseband 05.15.04, the phone is ALREADY unlocked (from the carrier) and running iOS 4.2.

    Is it possible to jailbreak without updating the baseband in order to unlock again, since it’s unlocked?

  • sam

    hi, i am planning to ask my friend to buy me a prepaid iphone 4 in US.and i live in philippines, what should i do to be ble to use it here? and is it ok if he buys fron at&t or somewhere else, what do you think is the best thing to do.. i dont have any idea.. please help..

  • wayne

    so if i were to buy a phone off ebay or craigs list i could unlock it and put my sim in it and it would work and i would have the same number and all

  • Sukh

    Q1. if baseband changes during jb & later can i restore it to factory setting.
    Q2. if i factory restore, my baseband will change back to previous one or not?

  • NiX

    @Sukh

    A1: Baseband won’t change unless you want to (in order to unlock);
    A2: No, once updated it won’t come back.

  • aamir

    can any 1 tell me how to jailbreak an iphone 4 in india plz