1. Wallace's Avatar
    I am asking on behalf of my brother who owns a iPhone 3G. He was quite happy running it on 3.1.3 but got fed up of the constant offer of a new update to 4.2.1 every time he connected to iTunes, that he caved in and "updated". I did advise him against it.

    Sadly, he regretted it straight away. The 3G runs like a dog. He has rebooted several times etc. but no speed up noticed.

    His iPhone is not and never has been, Jailbroken. Is it possible to "downgrade" back to v3.1.3?

    Note it is a 3G and not a 3GS.

    Thanks.
    01-30-2011 01:10 PM
  2. swooshme's Avatar
    If it was jailbroken and had SHSH backed up from 3.1.3. Then it is possible. If not then sorry, you cannot downgrade.
    01-30-2011 03:59 PM
  3. Wallace's Avatar
    Thanks for the info. I thought as much. I hope a restore will speed things up for him.


    Sent from my iPhone4 using Tapatalk
    01-30-2011 04:55 PM
  4. SeanHRCC's Avatar
    Just fyi...he'll never get the same performance as he had with 3.1.3...after iOS was put on the 3G, it basically pulled the ebrake on its performance as it simply does not have the processing ability to run it like it could OS3.
    01-30-2011 05:18 PM
  5. Wallace's Avatar
    Told him such before he did it. Next time I see him I'll take a look. Disable search etc.

    Not much else can be done. He's really pi@@ed off with it. He doesn't get his upgrade until October.
    01-30-2011 05:21 PM
  6. Massie's Avatar
    Wait...can't the 3G downgrade without SHSH? Definitely give it a tryApple only started using them built-in with the 3GS, and only started using soft SHSH on the 3G with iOS 4.0, I think. Worth a try.
    01-30-2011 05:28 PM
  7. Steve Doherty's Avatar
    What about forcing the phone into DFU mode, and then trying a restore from 3.1.3 firmware?
    02-02-2011 06:28 AM
  8. stevejobs's Avatar
    the iPhone 3G can be downgraded to 3.1.3 without having SHSH blobs saved (which happens when you jailbreak) also before that he should try a fresh restore onto 4.2.1 and when iTunes asks if he wants to restore from backup say NO, then sync all the stuff back! this will speed up the phone.
    02-02-2011 07:30 PM
  9. smalcom's Avatar
    There is a web site that has the .ipsw files available for all iPhone OS releases. I'm not sure how to use it, or how to restore the phone, but it does exist. Unfortunately, I have not posted at least 10 posts, so the system will not allow me to post the URL. Sorry.
    02-02-2011 09:11 PM
  10. Wallace's Avatar
    Thanks all for the info, I will pass it on to my brother. However, I suspect he won't want to risk turning it into a brick and he'll just put up with it until his upgrade time.
    02-03-2011 09:33 AM
  11. indus's Avatar
    just put ihone 3g in duf mode
    restore it with firmware 3.1.3
    at the end u will get phone in recovry mode just run umbrella-4.01.01 and take it out from recovry mode
    there is no risk at all

    Br
    10-21-2011 01:29 AM
  12. Fausty82's Avatar
    just put ihone 3g in duf mode
    restore it with firmware 3.1.3
    at the end u will get phone in recovry mode just run umbrella-4.01.01 and take it out from recovry mode
    there is no risk at all

    Br
    Do you realize that this thread has laid dormant for the past 8 months?
    10-21-2011 01:44 AM
  13. Hot94Z28's Avatar
    Well then wonder if he ever got it to go back to 3.1


    Sent from my iPhone using TapaMFtalk
    10-21-2011 08:02 PM
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