read below before u follow any guides

u are responsible for your own actions i will not be responsible for anything u do if u mess up some how its your problem not mine

downgrade iphone 3gs and iphone 4 on 4.3.4 (u must have shsh blobs)

u will need these files
download them all first

fownload itunes latest version from the apple site install that first before doing anything else

tinyumbrella-5.00.06.exe download


iPhone3,1_4.3.3_8J2_Restore.ipsw download

fixrecovery43.exe download

a modified hosts files download

first open tinyumbrella and u should see your blobs listed if u have 4.3.3 on the list then u can downgrade to that firmware same goes for other firmwares as long as u have the blobs for them if there is no blobs listed click save shsh if it does not find any blobs u cannot downgrade and will have to stick with 4.3.4 or higher firmware there is no work around (no blobs no downgrade simple as that)

if u have the blobs then follow the picture below for the setting needed then exit tinyumbrella

now replace the hosts files with the one u downloaded above and replace your current one
on windows 7 the file is located in....... C:\Windows\System32\drivers\ect
on xp the file its located in the same direcotry as windows 7



now reopen tiny umbrella and clcik on start tss server then open up itunes and while holding the shift key click the restore button now u need to point it to the firmware u downloaded above save it somewhere easy like the desktop click then open it and itunes will ask if u want to restore click yes it will then extract the firmware and the phone will restart and start restoring the 4.3.3 firmware let it do its thing once it has restored itunes will give u an error 1013 this is ok the firmware has fully installed

the iphone will now only display the connect to itunes logo this is what u want

now u have to put the phone into dfu  extract the 1013 exit recovery.rar file u downloaded and open the fixrecovery43.exe file only  once u are in dfu mode otherwise it wont work if u are in dfu open fixrecovery43.exe the process is automatic do not close the proggramme or dissconnect the device the iphone will reboot once done once its rebooted u will see it comes up with the emergency screen open itunes and it will finish it off u now have an iphone thats on 4.3.3 now u can jailbreak it : )

the last 3 images images are owned by the following websites if im infringing tell me and i will remove them
http://docgadget.blogspot.com/2011/04/fix-itunes-error-1013-when-updating.html
http://jaxov.com/2011/05/fix-ios-4-3-3-recovery-loop-on-iphone-4-3gs-using-tinyumbrella-fix-recovery/

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