I want to upgrade my iPhone 5 running iOS 7 to iOS 8. I dont want the current iOS 9 update in my device. Is there any way to update my phone to iOS 8 without iOS 9?
IOS – Upgrade iPhone 5 from iOS 7 to iOS 8
iosupgrade
Related Solutions
The final iOS rev for iPhone 3G is 4.2.1, and you could always save a backup before upgrading and restor to the 3.X version if 4.2.1 was too much of a hog.
Hope this helps!
Edit: This thread says its not even worth it. 4.2.1 is crippling to the device.
The kind folks behind http://iossupportmatrix.com have done the work to catalog all model identifiers (and also list the minimum and maximum versions of iOS for each model).
In your case, the iPhone 4 needs iPhone3,1_xxxx.ipsw
If you use a restore image, it wipes the device and loads that version of iOS. At that point, you could restore from an older or equivalent level OS backup or set things up newly by syncing content.
Best Answer
Yes this can be done you can download iOS firmware from http://www.felixbruns.de/iPod/firmware/
Once it is downloaded keep it on your desktop. Now put your device in DFU mode. (You can learn it from youtube if you dont know how to put your device in DFU mode.) iTunes will popup telling you it has discovered a device in recovery mode. Now press shift on your keyboard and click on restore. iTunes will start restoring your device.
NOTE: you might get few iTunes errors during the restore.