1. soso20000's Avatar
    Hi, am a new iPhone owner i never had one before, so i bought a locked iPhone 4 under the impression that its easily unlocked, i logged in jailbreakme.com and followed the instructions, and when its supposed to reboot it freezes up for about 2 hours, so i had to restore it and itunes updated my phone to OS 4.1 ( i didnt know it was a stupid move back then):s

    I found a couple of sites with steps to downgrade iPhone from 4.1 to 4.0.1 using SHSH blobs. I didnt save them so I had to download TinyUmbrella to extract them from the server, the problem is my iPhone 4 was OS 4.0.1, and the program cant find any SHSH files, its only successful finding iPhone 3g OS 4.0.1!! I dont have one so how come its successful finding the shsh files in 3g???! Am so confused and can find a useful way downgrading my iPhone plz any help?

    Btw I know it could be a stupid question but can I downgrade my iPhone 4 OS 4.1 to iPhone 3g 4.0.1?
    09-16-2010 04:53 PM
  2. alemkr#IM's Avatar
    I would say not. If you can wait a little while longer the jailbreak for 4.1 should be available (I hope). I was able to use tinyumbrella to downgrade and didn't have any issues once I downloaded the Apple firmware file for iphone 4. Of course my shsh file for 4.0.1 was available.
    09-16-2010 05:53 PM
  3. big9erfan's Avatar
    SHSH files CANNOT be "saved" or "extracted" after Apple stops signing a specific firmware. SHSH blobs are only "active" while Apple lets you restore a specific firmware ( ie 4.0.1 ). Once Apple stops saying it's ok to restore that version, then if you haven't saved them you are out of luck.

    The 3G has "soft" SHSH blobs, and TinyUmbrella probably has a bug in it if it's returning a 3G SHSH blob for an iPhone4.

    You cannot downgrade your iPhone 4 as you're on 4.1 and don't have SHSH blobs saved. You have to wait for a new jailbreak and unlock.
    09-16-2010 06:33 PM