User profile for user: NextelMichaelG
NextelMichaelG Author
User level: Level 1
36 points

Installing iOS 3.1.3 on iPhone 4

i have seriously contemplated installing iOS 3.1.3 on the iPhone 4 just to see if ALL THE PROBLEMS related w/the iPhone 4 go away!.. (yes, u could say i'm a bit impatient over the anticipated iOS 4 update, but it's more curiosity)..

what do you guys think? (besides losing the multi-tasking...) do u think the old OS will install on the iPhone 4???


(has anyone aLREADY tried it?!??)

CustomBuiltSuperPC, Windows 7, iPhone 4 32GB iOS 4 | iPhone 3G 16GB iOS 3.1.3 | Nextel i856

Posted on Jul 11, 2010 3:08 AM

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User profile for user: WilliamTR321
WilliamTR321
User level: Level 1
25 points

Posted on Jul 11, 2010 3:42 AM

No a downgrade will not work, as each build is specific to the device, and would have to be tailored to the iPhone4. iPhone builds between devices are different (e.g. iPod, iPhone 2g, 3g, 3gs) which there is no such package built for iPhone4 on 3.1.3 or anything prior to iOS4 that is out for the public. Perhaps Apple has one internally as they were developing the device, but doubtful you would get Alpha development software.
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User profile for user: WilliamTR321
WilliamTR321
User level: Level 1
25 points

Jul 11, 2010 3:42 AM in response to Mpower1001

No a downgrade will not work, as each build is specific to the device, and would have to be tailored to the iPhone4. iPhone builds between devices are different (e.g. iPod, iPhone 2g, 3g, 3gs) which there is no such package built for iPhone4 on 3.1.3 or anything prior to iOS4 that is out for the public. Perhaps Apple has one internally as they were developing the device, but doubtful you would get Alpha development software.
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User profile for user: CK6Speed
CK6Speed
User level: Level 1
40 points

Jul 11, 2010 4:39 AM in response to NextelMichaelG

Even if it were possible I don't see a reason for it. I am running iOS4 on my 3GS and I have no problems at all. Everything is works aside from a few apps that the developers still need an update for. My battery life is the same as before, basically I can find no problems on my 3GS after update to iOS4 since its release. The added upgrades on iOS4 is very much worth it too me. I can only imagine how much better iOS4 is on the iPhone 4 which I hopefully arrives in a week.
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User profile for user: Mr.C UK
Mr.C UK
User level: Level 2
410 points

Jul 11, 2010 5:24 AM in response to NextelMichaelG

Whether it's technically possible or not I'm not sure. Apple says it's not possible to instal any previous version of the iOS on an iPhone 4. Even if it was they wouldn't officially support it. I wouldn't recommend downgrading as it's risky and you may permanently damage the phone.
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User profile for user: Legionofone
Legionofone
User level: Level 1
15 points

Jul 11, 2010 6:22 AM in response to NextelMichaelG

1. No IPSW for 3.1.3 on the iPhone 4 (this could possibly be worked around with proper coding changes inside the IPSW.

2. The BIG problem is that apple has to sign upgrades for the device, That's why you have to have your SHSH blobs backed up to downgrade on a 3gs/3g/2g, Since there is no SHSH blobs for your iPhone 4 on 3.1.0/1/2/3 you will never get it to restore with iTunes and since no one has come up with a custom way to install IPSW's you could never do it. Interesting idea but not plausible.
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Installing iOS 3.1.3 on iPhone 4

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