That means that if you have a iPhone 4 /  3GS you cannot restore any firmware other than iOS 4.1 If you guys updated to iOS 4.1 and wanna go back to iOS 4.0.2 / 4.0.1 here is the step by step guide to downgrade your iPhone 4 / 3GS iOS 4.1 to 4.0.1 / 4.0.2 or below.

Note : You are eligible only if you saved your SHSH to Cydia Server before the release of iOS 4.1 via Cydia “make my life easier” button.

The process is very simple all you have to do is to add Saurik’s Server address to your system hosts file. This trick make iTunes thinks it is talking to Apple, it is talking to Cydia instead while the restoring process. Doing this will allow iTunes to access signatures already stored by Cydia “on file” feature. In simple words this duplicates the functionality exposed by Apple’s signature server, except using “on file” results rather than live request.

Note:

1. This process is only for those who saved their SHSH to Cydia Server already.
2. Read the whole process two-three times before starting the process.

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How to Edit and Save Hosts file in Windows

• Open Notepad with Administrative privileges by clicking Start, All Programs,Accessories, and then right-click Notepad and select to open as Administrator.

• Now browse to (C:/Windows / System32 / drivers / etc) in Notepad and open the hosts file, and add the following entry to the bottom of the file.
  

  74.208.10.249    gs.apple.com               <————

Now you navigate to files menu and save the hosts file. By doing this you changed the communication server from Apple to Sauriks Server, because your ECID is on that server. Now you can put your iPhone in DFU mode to restore back to to OS 4.0.2 or lower. Follow our previous guide Downgrade iPhone 3G / 3GS

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How to Edit and Save Hosts file in Mac OS X

• Navigate to Finder, Click to select Go to Folder… from the Go menu and Enter /etc into the input field and click the Go button.
• Now look for hosts file, right click on hosts file and open with Text Edit, and add the following entry to the bottom of the file.

74.208.10.249   gs.apple.com <————

• Now save the file and click on Save As.
• Because Text Editor can’t save your system files, here comes the tricky part, in save as windows use the following settings, take a close look at the following image.

Uncheck the “ If no extension is provide, use .txt “ and then press the save button.

• A host file will be appear on your Desktop, just drag and drop to /etc and follow the onscreen instructions.

By doing this you changed the communication server from Apple to Sauriks Server, because your ECID is on that server. Now you can put your iPhone in DFU mode to restore to any of the previous OS. Follow our previous guide Downgrade iPhone 3G / 3GS

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Stay tuned with us for your daily dose of iPhone news, you can follow us on twitter via @ihackinjosh You can also subscribe to our daily free e-mail news letter and keep your self updated with the latest of iPhone community.

Final version of iOS 4.1 will be available on 8th of September, and will be a free upgrade for iPhone 4, 3GS, 3G and iPod Touch users.

And of course, the front camera with FaceTime (also with iPhones). 40 hours of uninterrupted music thanks to its improved battery. The rear camera will allow us to record HD video at 720p. iPod Will be launched in three basic configurations: 8GB $ 229, 32GB for $ 299 64gb $ 399. Availability is set on next week but you can pre-order your device today.

We at iHackintosh are going to watch this live streaming on our PC, instead of our Macbook, you can also join our force. All you need is to install Mac OS X Snow Leopard on your PC with VMWARE. Installation procedure is easy and we already published a guide to install Snow Leopard in VMWARE Windows Edition.

Go Ahead and enjoy live streaming on your PC.

Here is the press release:

“Apple will broadcast its event on September 1 with their own technology leader in live streaming HTTP, which is based on open standards. To watch the stream you will need a Mac using Safari on Mac OS X 10.6, iPhone, iPod Touch or an iPad. The transmission will start at 10:00 am (local time) on September 1 and you can follow through www.apple.com

Apparently then, you can not follow the stream from Windows OS based systems, Linux, Android, WebOS, or any other operating system, so keep your Apple devices are ready and enjoy the show!

Note : I did not try these steps. They sound good to me in theory and others are reporting some success. After all, you have nothing to lose if you are already stuck on 4.0.2 without an SHSH in Cydia.  Here are the steps:

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If you were lucky to save your Cydia SHSH for 4.0.1, you can always downgrade iOS 4.0.2 to 4.0.1 for iPhone 4, iPhone 3GS

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Update : According to recent comments most of the attempts are failed, unfortunately i am still looking for a new 4.0.2 device in my local friends. I’ll post my experience here sooner or later once i get a new iDevice with iOS 4.0.2 out of box.

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1. Download firmware 4.0.1 for your iPhone.

2. Rename the file you just downloaded. ipsw to. zip and extract it with any achieve program for Windows or Mac

3. Look for *buildmanifest.plist* and open this file with notepad or text editor and replace all entries "8a306" with "8A400" and save the file, now repeat the same procedure with the file *restore.plist*

4. Download firmware 4.0.2 for your iPhone, rename it to. zip and unzip it with any achieve program for Windows or Mac.

5. Take all the files from the 4.0.1 and drag them over to the 4.0.2 zip archive that you have open.

6. Delete all the dmg files that have 002 at the end, leaving only the 001 files left.

7. Save the file and rename it to ipsw. This will be the file that used to downgrade.

8. It is not necessary for this procedure, but it will help you edit your HOSTS file in order to have a redirect server to Saurik when iTunes will check if your device is compatible with the firmware version you want to install. Here’s how:

MAC : Using Finder, click on "Go to Folder" menu "Go" and type / etc /. Copy the file "hosts" file on your desktop then open it with Text Edit and at the end of the file add the string:

74.208.10.249 gs.apple.com

Always save the file on your desktop and then drag it back into the folder "/ etc"

WINDOWS : Go to Start, All Programs, Accessories and click Notepad with the right button, select "Open as Administrator". Now go to C: / Windows / system32 / drivers / etc and open the hosts file, adding the end of this line:

74.208.10.249 gs.apple.com

Save the file.

8. Now put the iPhone in DFU mode and restore with the file you just created Step 7.

Note: this only works due to the similarities in 4.0.2 to 4.0.1 and 4.0. This will not be a way to downgrade to 3.1.x and may not work in future firmware updates.

(VIA BigBoss / iSpazio)

To make matters worse, the software is not as well done it should, and the iPhone takes longer than two minutes to change between a card and another. The adapter will cost $ 28.99 and can be purchased at this link .

The presence of a strong reference to music as promotional image suggests that the event will focus on the iPod and iTunes, although rumors from reliable sources suggests launch of a renewed Apple TV (which could called iTV) with iOS and lots of applications support.

At that price the popular TV series and TV shows will cost a constant audience of about $ 200 (estimated calculations) a year, at this price iTV may be a too expensive alternative to cable and satellite television. On the other hand, this service gives people the opportunity to watch the series, they missed or can not take with the help of the above decisions.

Wait and watch for Apple September event, who knows how Apple will surprise us this time.

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Update : Apple has finally made their September event official, and it’s coming sooner than many expected. Apple’s "special event" will be held September 1 in San Francisco, and from the looks of things it’s going to involve music. VIA Gizmodo

See you soon!

This application, which costs $ 4.99 is available in the Cydia store, one purchase works for all of your iDevices including iPad. The interface is simple as a kind of Exposé, where you can manage applications just as done with web pages, including even the ability to reorganize in a very simple.