Upgrading a jailbroken iPhone 3G
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Juicer_90 • September 20, 2012 at 2:50am
I have an iPhone 3G that I purchased and jailbroke a long time ago. I am looking to upgrade the firmware version. Since I bought the iPhone in a different country, I am not concerned about voiding my warranty. The device is currently an 8GB model running version 3.0 (7A341) with modem firmware 04.26.08. What is the latest version I can upgrade to and still jailbreak it? How will upgrading affect the speed of my phone? Can I use tutorials that are meant for the iPhone 3GS?
Answers
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iClarified • September 20, 2012 at 3:06pm
The latest firmware version supported by the iPhone 3G is iOS 4.2.1. You cannot upgrade to iOS 5 or use tutorials meant for the iPhone 3GS, as the hardware specifications are different. To upgrade while preserving your 04.26.08 baseband for unlocking, you should use PwnageTool or Sn0wBreeze to create a custom IPSW. Once updated to 4.2.1, you can install UltraSn0w from Cydia to unlock the device. Be aware that iOS 4.x is more resource-intensive than version 3.0, so you will likely notice a decrease in performance and speed on the older iPhone 3G hardware. You can find updates on the relevant jailbreak tools here: www.iclarified.com/22349/iphone-devteam-releases-redsn0w-and-pwnagetool-updates-to-jailbreak-ios-511