If you have an iphone 3G as well as you have this feeling that upgrading to iOS 4 has slowed down your gadget as well as that you want to go back to iphone 3.1.3 / 3.1.2. Or if you are one of those iphone 3GS (new bootrom) or iPod touch 3G / 2G (MC model) individual who has upgraded to iOS 4 only to discover out that you cant jailbreak it can comply with the directions published below to downgrade iOS 4.0 to iOS (formerly iphone 3.1.3 or 3.1.2).
Step 1: download the old iphone OS 3.1.3, iphone OS 3.1.2 ipsw firmware files. (Download links: 3.1.3 / 3.1.2)
Step 2: put your gadget into DFU mode (not healing mode).
Connect your iphone to your computer.
Turn iphone off.
Start iTunes.
Hold Power as well as house buttons together for 10 seconds or so.
Release Power button however keep holding the house button up until your computer recognizes a new USB device.
iTunes will now acknowledge your iPhone.
Note: Your iphone screen at this time around must be blank (black in color), if not, then you are a lot of likely in healing Mode, not DFU mode.
(Step 3 is for iphone 3GS individuals only. If you are on iphone 3G or iPod touch 2G (non-MC model), avoid step 3 as well as continue from step 4)
Step 3: This step is applicable to iphone 3GS, iPod touch 3G as well as iPod touch 2G (MC model) which have their SHSH blobs (ECID SHSH) saved on Cydia for the firmware you downgrading on. If you don’t have your SHSH data saved, you cannot downgrade the pointed out devices.
So what we will do is to technique iTunes into believing that it is enjoying Apple servers, while in real, we are going to modification the address to Saurik’s server.
Navigate to C:\Windows\System32\drivers\etc\ as well as find “hosts” file.
Mac individuals can get to “/etc/” directory by going with “Go –> go to Folder” from Finder.
Open this “hosts” data in Notepad (for Windows) or TextEdit (for Mac OS X) as well as add this
74.208.105.171 gs.apple.com
line as shown in the screenshot below:
Now just save this data as well as you are great to go!
NOTE for Windows 7 as well as Vista: begin “Notepad” with administrator privileges by ideal clicking on “Notepad” app, as well as click on “Run as Administrator“ option.
Step 4: You will now have to bring back your iphone or iPod touch to the firmware you downloaded in step 1. click on your phone icon from the sidebar in iTunes. now press as well as hold left “alt” (option) button on Mac (Left “Shift” button on Windows) on the keyboard as well as then click on “Restore” (Not “Update” or “Check for Update”) button in the iTunes as well as then release this button.
This will make iTunes timely you to choose the place for your downloaded firmware file. choose that ipsw data as well as click on “Open”.
Step 5: now sit back as well as take pleasure in as iTunes does the rest for you. This will include a series of automated steps. Be individual at this stage as well as don’t do anything silly. just wait while iTunes installs firmware on your iphone or iPod touch. Your iphone screen at this point will be showing a development bar indicating installation progress. now at some point, iTunes will throw 1011, 1013 or 1015 error at you. This is normal, just neglect this error as the firmware has already been effectively installed on the device.
Step 6: now you will requirement to exit your gadget from healing Mode. To do this, download a program called RecBoot (Windows / Mac). Run it as well as the click on “Exit healing Mode” button. Your gadget will now restart normally.
This is it, you must now be able to jailbreak your gadget on this older OS. For iphone 3.1.2 firmware, you can utilize blackra1n, PwnageTool, redsn0w, sn0wbreeze, ultrasn0w as well as blacksn0w to jailbreak as well as unlock your iphone as well as iPod touch. For iphone 3.1.3 firmware for iphone 2G, 3G, 3GS as well as iPod touch 1G/2G, you can utilize redsn0w 0.9.3, redsn0w 0.9.4, sn0wbreeze, PwnageTool 3.1.5. Unlocking can be done utilizing ultrasn0w or blacksn0w. iphone 3.1.3 (on gadgets with new bootrom as well as baseband) can utilize Spirit to jailbreak iphone 3GS/3G as well as iPod touch 3G/2G.
You may likewise like to inspect out:
Fix 1604, 1600 error during iOS 4 custom-made Firmware bring back in Tunes
Save SHSH Blobs (ECID SHSH) of iOS 4 on Windows as well as Mac
How to Unlock iOS 4 with Ultrasn0w as well as Blacksn0w on 05.13.04 Baseband [Guide]
How to Jailbreak iOS 4.0 on iphone 3GS, iphone 3G as well as iPod touch 2G utilizing Redsn0w, PwnageTool 4.0 (Windows)
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