How To Restore To iOS 4 Firmware On iPhone or iPod Touch

Apple has recently released iOS 4 firmware, you can download it directly from here and it has some great new features in iOS 4. Apple devices like iPhone 3G, iPhone 3GS, iPod Touch 2G and 3G ( 3rd generation) devices can update to the iPhone OS 4


In order to update or restore iOS 4 Firmware, follow the procedure below

Connect your iPhone or iPod Touch to your computer through the USB cable and then Run iTunes 

1. Make sure you have already downloaded the ipsw file of iPhone 4 OS firmware

2. Run iTunes, it will detect your apple device in the left pane and then click in apple device and then click the summary tab

3. Now Press Shift and then click the restore button on iTunes interface.

4. Locate the firmware and then click Open

5. Now iTunes will restore the latest new OS on your apple device

Note: Make sure you have already synced and backup your apple devices data and other apps

The same procedure applies for Mac OS users too, the only difference is to click the Option key and then click the Update key in Step 3

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