*My* Top 10 Reasons to NOT Jailbreak

[ppc750fx]

Agree with that 10 top list to NOT jailbreake iphone. I never done it and i will never do it. The lack of some apps like video recording or running apps in background are reason of iphone hardware limitation rather than apple policy etc. So if will decide to run that apps its fine but don't be surprised that your iphone lagging/crushing all the time. I would rather not like to have unstable iphone. No thanks for jailbreaking.

The fact that you've never jailbroken should be a warning sign to readers that you don't know what you're talking about. Unfortunately, I fear that some readers may not pick up on that, so we should probably go over this again:

Jailbreaking your iPhone doesn't magically make it start "lagging"/crashing more.

 

[TheSpaz]

The fact that you've never jailbroken should be a warning sign to readers that you don't know what you're talking about. Unfortunately, I fear that some readers may not pick up on that, so we should probably go over this again:

Jailbreaking your iPhone doesn't magically make it start "lagging"/crashing more.

You mean "lagging"/crushing

 

[ppc750fx]

You mean "lagging"/crushing

Aw, 'cmon... they're not *that* heavy...

 

[TheSpaz]

Aw, 'cmon... they're not *that* heavy...

That's what iPoppy's post said.

"but don't be surprised that your iphone lagging/crushing all the time. "

 

[ppc750fx]

That's what iPoppy's post said.

Oh. Wow. You're right.

Well at any rate, it won't cause that either. Unless you put on a lot of jailbroken apps. Then it might get kinda heavy.

 

[bytethese]

Oh. Wow. You're right.

Well at any rate, it won't cause that either. Unless you put on a lot of jailbroken apps. Then it might get kinda heavy.

So how much does a 16GB drive weigh if it's full vs when it's empty?

 

[shk718]

apple is now saying jailbreaking is illegal. i wonder if that means their going to start clamping down on it:


http://i.gizmodo.com/5153101/apple-says-jailbreaking-iphones-is-illegal-dammit

 

[firewood]

If your iPhone breaks in such a way that you can't do a restore (docking connector pin cracks, USB chip gets corroded or zapped, etc.), the evidence that you voided your warranty is sitting right there for the Apple repair guy to see (and Apple has been known to change how much they enforce their rules).

App store apps are apparently allowed to phone home with your UDID and information about whether on not your device was jailbroken. If you run app store apps on a jailbroken device, your UDID might well be on a list of such devices already, with a copy of that list sent to Apple.

Developers rarely or never test their apps running under modified OS environments. Same with Apple. So every App store app you download is essentially untested on your OS and with whatever else your modified OS loads into memory.

Developers are already talking about the fact that the app piracy rate is higher among owners of jailbroken devices, so if they get a bug reports or crash logs from people with jailbroken devices (and no similar reports from those running a stock OS installations), those support requests are likely to go to the bottom of the list. (They might even consider that a "feature" instead of a bug.)

It's easier for developers to run malware if a modified OS allows easy access outside their app's sandbox (e.g. what will developers do when they discover that their app's DRM security has been removed by the OS?).

imho.

 

[TheSpaz]

These quotes were taken directly from Apple. Here's some more reasons not to jailbreak.

"The OS implements a number of essential safety and control functions. For example, it monitors the thermal condition of the device and shuts it down if it is overheating. It controls the charging of the battery, instructing the relevant circuitry when to start and stop charging the battery, and at what level to charge it. The OS also implements certain governors on the phone’s volume. If modifications to the OS were to interfere with these control functions, even unintentionally, the phone could be physically damaged or the battery could be overcharged."

"Current jailbreak techniques now in widespread use utilize unauthorized modifications to the copyrighted bootloader and OS, resulting in infringement of the copyrights in those programs. For example, the current most popular jailbreaking software for the iPhone, PwnageTool (cited by EFF in its submission), causes a modified bootloader and OS to be installed in the iPhone, resulting in infringement of Apple’s reproduction and derivative works rights. Specifically, in the spring of 2008, hackers were able to determine how to circumvent the secure ROM in the iPhone and falsely sign the bootloader. Using such knowledge, a falsely signed modified version of Apple’s bootloader was created that will fool the secure ROM into loading it, thereby circumventing the TPM implemented by the secure ROM. PwnageTool directly modifies a copy of the bootloader and loads it onto the iPhone. The modified bootloader is configured so that it does not perform the authentication check of the OS, and it therefore loads a modified version of Apple’s OS that is not signed, thereby circumventing the TPM implemented by the bootloader. The modified OS, in turn, is configured so that it does not perform authentication checks on application programs loaded onto the iPhone, thereby jailbreaking the device. In sum, PwnageTool circumvents every link of Apple’s “chain of trust” TPMs in the iPhone. More generally, as the EFF submission admits, “decryption and modification of the iPhone firmware appears to be necessary for any jailbreak technique to succeed on a persistent basis."

"Here, the modifications to the bootloader and the OS that are made to jailbreak the
iPhone clearly harm the interests of Apple as the owner of the copyright in those
programs. As discussed in Section II.B.2 above, those modifications can readily cause
significant problems in the operation of the iPhone – interference with safety, control and
security functions of the device; interference with the proper operation of the APIs and
system calls of the OS, causing application programs to fail to operate correctly on the
phone; and failure of updates to the OS distributed by Apple to work correctly, which can
also result in functional problems with the device, potentially causing it to fail to
operate.45 These functional problems diminish the value of the iPhone, including the
software that makes it operate. The value to Apple of the OS as the key operational
component of the iPhone depends upon preservation of its operational integrity so that
users have a consistently good experience with the product.

Equally important, functional problems that result from unauthorized modifications to the
OS increase Apple’s support costs substantially. Apple’s iPhone support department has
received literally millions of reported incidents of software that crashes on jailbroken
iPhones, although it works properly on unmodified iPhones. For example, one recent
software crash caused by jailbroken phones was reported over 1.6 million times from
users of just 10,000 jailbroken phones. Two other recent crashes caused by jailbroken
phones were reported over 2 million times and over 2.4 million times, respectively.
Apple has also become aware that some jailbroken versions of the bootloader make it
impossible to update the baseband processor (BBP) in the iPhone, which controls the
ability of the iPhone to connect up to the telephone network and make calls. Because
each update that Apple distributes to the BBP contains updates and fixes, a phone that
cannot update the BBP will potentially experience problems making calls. When that
happens, Apple’s support department gets flooded with calls."

 

[Auzburner]

Theoretically, and I'm aware it's a bit of a stretch, but if the Dev Team was somehow shut down and a jailbreak was no longer possible: Couldn't the application developer for say, Cycorder create a permissions file with your particular "Identifier" and a jailbreak would not be necessary to install the application?

 

[OrangeDog]

These quotes were taken directly from Apple. Here's some more reasons not to jailbreak.

"The OS implements a number of essential safety and control functions. For example, it monitors the thermal condition of the device and shuts it down if it is overheating. It controls the charging of the battery, instructing the relevant circuitry when to start and stop charging the battery, and at what level to charge it. The OS also implements certain governors on the phone’s volume. If modifications to the OS were to interfere with these control functions, even unintentionally, the phone could be physically damaged or the battery could be overcharged."

"Current jailbreak techniques now in widespread use utilize unauthorized modifications to the copyrighted bootloader and OS, resulting in infringement of the copyrights in those programs. For example, the current most popular jailbreaking software for the iPhone, PwnageTool (cited by EFF in its submission), causes a modified bootloader and OS to be installed in the iPhone, resulting in infringement of Apple’s reproduction and derivative works rights. Specifically, in the spring of 2008, hackers were able to determine how to circumvent the secure ROM in the iPhone and falsely sign the bootloader. Using such knowledge, a falsely signed modified version of Apple’s bootloader was created that will fool the secure ROM into loading it, thereby circumventing the TPM implemented by the secure ROM. PwnageTool directly modifies a copy of the bootloader and loads it onto the iPhone. The modified bootloader is configured so that it does not perform the authentication check of the OS, and it therefore loads a modified version of Apple’s OS that is not signed, thereby circumventing the TPM implemented by the bootloader. The modified OS, in turn, is configured so that it does not perform authentication checks on application programs loaded onto the iPhone, thereby jailbreaking the device. In sum, PwnageTool circumvents every link of Apple’s “chain of trust” TPMs in the iPhone. More generally, as the EFF submission admits, “decryption and modification of the iPhone firmware appears to be necessary for any jailbreak technique to succeed on a persistent basis."

"Here, the modifications to the bootloader and the OS that are made to jailbreak the
iPhone clearly harm the interests of Apple as the owner of the copyright in those
programs. As discussed in Section II.B.2 above, those modifications can readily cause
significant problems in the operation of the iPhone – interference with safety, control and
security functions of the device; interference with the proper operation of the APIs and
system calls of the OS, causing application programs to fail to operate correctly on the
phone; and failure of updates to the OS distributed by Apple to work correctly, which can
also result in functional problems with the device, potentially causing it to fail to
operate.45 These functional problems diminish the value of the iPhone, including the
software that makes it operate. The value to Apple of the OS as the key operational
component of the iPhone depends upon preservation of its operational integrity so that
users have a consistently good experience with the product.

Equally important, functional problems that result from unauthorized modifications to the
OS increase Apple’s support costs substantially. Apple’s iPhone support department has
received literally millions of reported incidents of software that crashes on jailbroken
iPhones, although it works properly on unmodified iPhones. For example, one recent
software crash caused by jailbroken phones was reported over 1.6 million times from
users of just 10,000 jailbroken phones. Two other recent crashes caused by jailbroken
phones were reported over 2 million times and over 2.4 million times, respectively.
Apple has also become aware that some jailbroken versions of the bootloader make it
impossible to update the baseband processor (BBP) in the iPhone, which controls the
ability of the iPhone to connect up to the telephone network and make calls. Because
each update that Apple distributes to the BBP contains updates and fixes, a phone that
cannot update the BBP will potentially experience problems making calls. When that
happens, Apple’s support department gets flooded with calls."

That should be food for thought for some.

 

[TheSpaz]

That should be food for thought for some.

So technically, you can damage your hardware with buggy software. Start modifying the software and you could be damaging your iPhone permanently. Also, people who damage their iPhone, then restore it, then bring it back to Apple as if it were Apple's fault, are not doing Apple any favors. Apple has to replace those units if they do not know they were hacked.

 

[OrangeDog]

So technically, you can damage your hardware with buggy software. Start modifying the software and you could be damaging your iPhone permanently. Also, people who damage their iPhone, then restore it, then bring it back to Apple as if it were Apple's fault, are not doing Apple any favors. Apple has to replace those units if they do not know they were hacked.

More and more posts around the forums are saying that Apple can infact tell-

http://www.ipodtouchfans.com/forums/showthread.php?p=1269143#post1269143

 

[TheSpaz]

More and more posts around the forums are saying that Apple can infact tell-

http://www.ipodtouchfans.com/forums/showthread.php?p=1269143#post1269143

You mean to tell me that because someone on some forum said that Apple can tell (with no proof) you believe them? I'm not saying you're wrong, but without proof, I'm not sure if I really believe that. Software is software and when you overwrite the entire filesystem with a fresh Apple Certified OS, they shouldn't be able to tell. If you're extra worried about it, you could always do an erase directly from the iPhone. This erase actually writes zeros over the entire disk so that there is absolutely nothing left on it... no data would be recoverable ever.

 

[Night Spring]

You mean to tell me that because someone on some forum said that Apple can tell (with no proof) you believe them? I'm not saying you're wrong, but without proof, I'm not sure if I really believe that. Software is software and when you overwrite the entire filesystem with a fresh Apple Certified OS, they shouldn't be able to tell. If you're extra worried about it, you could always do an erase directly from the iPhone. This erase actually writes zeros over the entire disk so that there is absolutely nothing left on it... no data would be recoverable ever.

But according to Apple's own statement that you quoted at length, they've been collecting app crash data, and can tell which data comes from jailbroken phones. And since the phone can also send device ID info without user permission, that means they have the means to match the iPhone device ID to the crash data and make a registry of jailbroken phones. So even if they can't prove that a phone has been previously jailbroken by examining it physically, they could, if they chose to, create such a registry, and prove that a phone has been previously jailbroken.

 

[bytethese]

You mean to tell me that because someone on some forum said that Apple can tell (with no proof) you believe them? I'm not saying you're wrong, but without proof, I'm not sure if I really believe that. Software is software and when you overwrite the entire filesystem with a fresh Apple Certified OS, they shouldn't be able to tell. If you're extra worried about it, you could always do an erase directly from the iPhone. This erase actually writes zeros over the entire disk so that there is absolutely nothing left on it... no data would be recoverable ever.

This is not entirely true. The firmware overwrites the system partition but a forensic analysis can pull some deleted data off the drive. Trust me.

With that said, it's a lot of work to do this. Unless someone did a capture of your disk and analyzed with a hex editor, FTK, EnCase, etc, they cannot tell that your phone was previously jailbroken, but there may in fact be remnants of the process.

 

[OrangeDog]

I've seen the evidence posted. Do some searching, it's pretty common knowledge.

 

[Mikey B]

I've seen the evidence posted. Do some searching, it's pretty common knowledge.

Actually, you are 100% wrong. Well, let me clarify- Apple is in no way EVER going to take the time to actually go through all the steps they would have to take to determine if a DFU-restored iPhone/Touch had been jailbroken. Not ever. They have no magical diagnostic tool to plug into iPhones and hunt for jailbreaking. In fact, I guarantee you that 99.9% of Geniuses could give a flying f***. It really irkes me to see this misinformation being spread. Let me repeat- Apple will never be able to tell if your device is jailbroken unless you had it to them as such. It is not "common knowledge" that Apple can detect a jailbreak. In fact, it is exactly the opposite.

And even then, they probably don't care. I just had my iPhone swapped because I had a ton of dust under my screen and I handed it to a concierge fully jailbroken, Cydia on the main page and 5 icons in the dock. Helooked at the dust, brought it back to the Geniuses, came back and said to make an appointment to have it exchanged. This is at least the second time I have had a jailbroken iPhone serviced.

As far as the philosophy of to jailbreak or not, sometimes I'm all for it, and sometimes I go stock. You can definitely develop lags and little quirks, but like anything, it's a cost/benefit analysis. If the benefits outweigh the costs, than it's worth it. If not, stock is the way to go. For me, when I get tired of what JB has to offer, I restore. And vice versa. It is ridiculously easy.

 

[OrangeDog]

Actually, you are 100% wrong.

http://www.modmyi.com/forums/genera...pple-can-tell-iphone-has-been-jailbroken.html

Theres lots and lots of posts that refute you.

 

[Mikey B]

http://www.modmyi.com/forums/genera...pple-can-tell-iphone-has-been-jailbroken.html

Theres lots and lots of posts that refute you.

And there are thousands upon thousands of jailbroken iPhoners that refute you.

Linking to other people's paranoia isn't proving anything.

P.S If you are referring to Baseband modification, remember that you are confusing Apples and Oranges. Jailbreaking and Unlocking are 2 completely different things.

Not to mention the link you provided pretty much proves what I'm saying- even if Apple could actually find away to do it, they have little to no motivation to actually try.

I have given Apple Geniuses a jailbroken iPhone countless times, some visits they have run diagnostics and some they have not. And not once did they even say the word jailbreak. They don't care.

 

[miggitymac]

They don't care.

They're smart.

No one should really care whether 1 person JBs or not...just do what YOU want and leave others to do what they want.

So many angry people out there....just go off and play with your iphones.

 

[OrangeDog]

I'm just excited that my non jailbroken iPhone is running like a dream, super responsive, no lag, no bugs, no freezing, no weird things happening. It's turned back into a tool and not a toy.

My iPod touch is Jb'n still, but that is a toy imo.

 

[bruinsrme]

I'm just excited that my non jailbroken iPhone is running like a dream, super responsive, no lag, no bugs, no freezing, no weird things happening. It's turned back into a tool and not a toy.

My iPod touch is Jb'n still, but that is a toy imo.

Paying as much as I do every month this thing better be as much of a toy as it is a phone and tool.......

 

[Masquerade]

So technically, you can damage your hardware with buggy software. Start modifying the software and you could be damaging your iPhone permanently. Also, people who damage their iPhone, then restore it, then bring it back to Apple as if it were Apple's fault, are not doing Apple any favors. Apple has to replace those units if they do not know they were hacked.

No matter what technically Apple say, you will believe it.
Even reading all the article, you found more atractive to post only the Apple-reaction to the EFF comments,
than informe the people here whats happening. So i acuse you of being an Apple fanatic!

cite:
"The EFF wants users to be able to freely modify Apple's iPhone software so that applications independent of the official App Store can be used on it. The group has proposed an exemption to the DMCA for "computer programs that enable wireless telephone handsets to execute lawfully obtained software applications, where circumvention is accomplished for the sole purpose of enabling interoperability of such applications with computer programs on the telephone handset."

To remember, that EFF are the same guys that fight against governments like yours (political content removed) and organizations who want to put rules or control on the internet.
So Apple control your handheld, that you paid for. EFF is trying to put an end to it.

 

[lavrishevo]

This thread is so ridiculous. The proper title should be:

The top 10 reasons I want attention and need confirmation from others to make myself feel better

If you don't want to jailbreak your phone this is more then acceptable, for those who do wish jailbreak this is quite all right. There is zero point to this pathetic thread of insecurity. Why not talk about something constructive?