iPhone 3G iOS (Original IPSW Firmware) official IPSW download & see Instructions below how to do iOS update in your iPhone 3G device.
iPhone 3G iOS 4.2.1 (8C148) IPSW Firmware Download
How to do an iOS update:
- NOW, Open Settings.
- Click on >> General >> Software update >> Download and install.
- Get enter your passcode.
- Click the “Agree to terms and conditions” 2 times.
- Wait until the new update gets downloaded.
- After that, tap on Install when prompted
iPhone will restart 2 times during updating the new iOS update. Now, you did not press any key & just waited until an update to get completed.
How to Install iOS Firmware Using IPSW File
If you can install the iOS firmware using Windows or Mac OS. But, first, you download iTunes first on your PC. Download the Officially latest version of iTunes from the official site of Apple.
- Let’s connect your iPhone device to your computer, Via USB Cable.
- Open iTunes and select your device.
- To select the iPhone 3G IPSW file, you need to press a definite key:
Only Mac User; – Hold on the “option” key and then click on “update”.
Just Windows User – Hold down the “Shift” key and then click on the “Update” button.
- Now, choose the iPhone 3G IPSW file that you have downloaded and click on the selected button.
That’s it. Now you have successfully finished installing, If you have any queries about this then feel free to contact me.