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  1. #1
    Can't downgrade iPhone 4 ios 4.0

    Member Since
    Sep 21, 2011
    Posts
    24
    Can't downgrade iPhone 4 ios 4.0
    I have the first gen iphone 4 with ios 5.9.1. The ios 5.0 is slow & buggy. I want to downgrade to ios 4.0. But it just won't install on my iphone.

  2. #2
    Can't downgrade iPhone 4 ios 4.0
    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
    Posts
    6,759
    Specs:
    27" iMac i7 (2011) 10.10, iPhone6, iPad Air 2, AppleTV2
    No, it won't you're correct.

    v4 is no longer signed by Apple.

    In order to downgrade you need SHSH blobs from the version you want to downgrade to, the IPSW file for that version and you need to be prepared to play around with your hosts file to stop iTunes dialing home for the downgrade.

    I've not heard of, or experienced (I have 2 iPads, 2 iPhone 4 and an iPhone 4s all on iOS 5.1.1 in the household) any significant iOS5 bugs. Certainly not enough to warrant ditching the features of 5 to go back to 4.

    What issues are you having in particular?

    Have you tried a hard reset - backup - sync - restore - sync ?
    External hard disk acquisition addict - but admitting the problem is the first step to a robust backup

    Please use the reputation system if you think you've been helped - top right of this post

  3. #3
    Can't downgrade iPhone 4 ios 4.0
    Raz0rEdge's Avatar
    Member Since
    Jul 17, 2009
    Location
    MA
    Posts
    8,184
    Specs:
    27" i7 iMac, 24" iMac, 13" Macbook Air, iPhone 5 & 5S, iPod Nano 7th Gen, iPad 2 16GB WiFi, iPad 3
    iOS 5 is very stable on my iPhone 4, as mrplow suggested, you might want to try a restore first before trying to downgrade to iOS 4..
    --
    Regards
    ...Ashwin



    Be sure to read the Community Guidelines | The more information you provide, the better answers you get, remember GIGO.

  4. #4
    Can't downgrade iPhone 4 ios 4.0
    chas_m's Avatar
    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    18,933
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    No idea what you mean by "iOS 5 is slow and buggy." That's not the experience of the millions who have bought the iPhone of late (and the millions more who've upgraded).

    I'd say that problem is likely on your end, but you may also want to do a reset and reinstall and check with a tech if it continues being a poor experience for you.

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