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Discuss Is there a Flowchart for which jailbreak and unlock solution is best? at the iPhone 3GS -; Hello! Please forgive me; I've done my dev team blog and hackint0sh homework, but I've ...
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    Default Is there a Flowchart for which jailbreak and unlock solution is best?

    Hello! Please forgive me; I've done my dev team blog and hackint0sh homework, but I've failed to locate a guide that identifies the best jailbreak and unlock solution for particular phones. If you could point me the right direction, I would appreciate it.

    My background: I have used a number of jailbreak and unlock options on my old 2G, often with difficulty but with ultimate success. I could never justify a data plan in my life, so I unlocked my phone and ran without it. Backgrounding apps and other jailbreak ammenities are nice, but avoiding that data plan is my primary reason for jailbreaking.

    I rather screwed the pooch when I attempted to replace a bad digitizer, and destroyed my 2G's wifi capabilities. Err--oops? With neither a data plan nor wifi, I suddenly have a deaf and mute smartphone. Lack of auto-syncing contacts and calendar for this organizational idiot is a no-no, so I thanked my lucky stars for two good years on legacy hardware and went shopping for a new phone.

    2G all over again vs 3GS? I chewed my fingernails over the decision for a long time. After all, I know how to jailbreak the 2G! With the advent of iOS 4.0, though, I feared new apps would stop being retrocompatible with the older phones, and bit the upgrade bullet.

    Now then, to the reason I seek a flowchart: I must re-learn how to jailbreak phones. My first jailbreak took 36 agonizing hours, though jailbreaks 2 and 3 took 2.5 hours and 5 minutes, respectively. I like to think of myself as "not an idiot," but neither am I a hacktivation hexpert. Getting it right the first time would be delightful. The ultimate goal is to avoid the data plan while still having a fully functional and reliable iPhone. I use my cell phone for business, gaming, life organization, emergencies, entertainment, and goodness knows what else. If I must do a tethered unlock, I fear I'll have to keep an emergency pay-per-use phone in the car lest the phone need a reboot when I have a flat tire in the desert.

    I have the "new" (to me) 3GS in my possession and purchased it from someone who is not a technical person by any stretch of the imagination. He neglected to send the sim card tray with the phone. When it arrives tomorrow I believe I'll know the state of the firmware. Until now, everything is research in the hopes that 36 hours or less will result in a fully capable phone.

    Many thanks for your assistance, and apologies for writing The Life and Times of Two Phones. If you have any insider knowledge, I'll take it.

    One last question: I know to change my SSH password when I'm finished with the jailbreak. What other steps are best to protect a jailbroken phone? I have no interest in contracting malware nor in sharing my data with unknown persons. Many thanks!

    I left out crucial information: I jailbreak and unlock with windows. It ups the degree of difficulty. I can beg, borrow, or steal a mac if absolutely necessary.
    Last edited by IrishFire; 06-28-2010 at 07:52 PM.

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    Super Moderator Array n1ckn4m3's Avatar

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    You may have some bad luck. Depending on how old the 3GS is and what firmware is installed on it, you may have to wait.

    The first thing you'll want to find out is which bootrom your phone has. You can use the Firmware Umbrella to determine both firmware revision and bootrom. If you're running 359.3.2 (the new bootrom), you're completely out of luck for an iOS 4.0 and can only jailbreak 3.1.2 or 3.1.3. If you're running 359.3 (the old bootrom), then you can jailbreak up to iOS 4.0 so long as you are running on 3.1.2 or 3.1.3.

    The 3GS has new signature checking during firmware restores that the 2G didn't have. When you attempt to flash firmware to the device, iTunes contacts Apple and requests them to approve the update. Depending on the firmware revision, Apple replies "yes" or "no" to the upgrade. At this point, Apple is only replying "yes" to 4.0. That said, 4.0 cannot be jailbroken if it is already installed on a 3GS right now.

    In order to jailbreak a 3GS, you must be running iOS 3.1.2 or iOS 3.1.3 (or lower) -OR- have an SHSH on file for 3.1.2 or 3.1.3, so that you can downgrade to it. There is no jailbreak for a 3GS that is currently running 4.0 yet, so you have to be able to downgrade to a jailbreakable OS, which requires the SHSH files.

    Once you determine what firmware it's running, etc., we'll have enough information to go on, but understand going in that it's possible you'll get a phone you can't do anything with until new tools are released, depending on firmware revision + bootrom version.
    The preceding forum post has been brought to you by the letter "N" and the number 42.

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