How to Jailbreak, Restore and Restore Down Idevices Running 4.0 and 4.01

Ever wanted to jailbreak your iDevice or downgrade it, then this is the tutorial for you!

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1Edit step
1
To start off, make sure your iDevice (iTouch or iPhone) is running ios 4.0 or 4.01. If it isn't scroll down to the restoring down section to see if it is possible.

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2Edit step
2
Go to safari on your iDevice and navigate to http://www.jailbreakme.com/ and slide the bar on the bottom that says "Slide to Jailbreak"
3Edit step
3
Your iDevice has officially been jailbroken and Cydia has been installed on your device rearing to go

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4Edit step
1
Connect the iDevice to your computer via the USB connector cable.
5Edit step
2
Open iTunes if it has not opened automatically
6Edit step
3
Select the iDevice in the navigation pane on the left
7Edit step
4
Click the restore button and voila! Your iDevice is restoring

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8Edit step
1
Before you restore down, you need two things: iTunes 9.2.1 or 9.2 NOT 10.0 or 10.01 (as these will not allow you to restore down) and your SHSH blobs MUST be saved on Saurik's servers, if they are not, then your out of luck
9Edit step
2
If you have those two things, your ready to go and lets start
10Edit step
3
Connect the iDevice to the computer and open up iTunes
11Edit step
4
Before the actual restore, you must navigate to "C:\Windows\System32\drivers\etc\hosts" on windows or "/etc/hosts" on a mac.
12Edit step
5
You then must add this line to the bottom of the file: "74.208.105.171 gs.apple.com"
13Edit step
6
save it then download the ios you want to restore to (ios 4.0 or 4.01)
14Edit step
7
In iTunes, when you click restore, you must hold down the shift key on windows or option key on a mac
15Edit step
8
Choose the .ipsw file and wait until its finished. Now you can jailbreak using jailbreakme.com
16Edit step
9
Finally, delete "74.208.105.171 gs.apple.com" from the hosts file

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