Unlock iPhone 4 iOS 4.2.1 with Ultrasnow 1.2 and Jailbreak with Greenpoison RC5
However, by Jailbreaking your iPhone 4 iOS 4.2.1 with Greenpoison RC5 will make your iPhone 4 impossible to unlock with Ultrasnow 1.2 [ at this moment]
For those of you who still have the iPhone 4 with 1.59.00 baseband, you can now jailbreak your device with Greenpoison rc5 and unlock with Ultrasnow. The trick is to keep your old baseband and we’ll teach you how to do it.
Warning: This is for iPhone 4 baseband 1.59.00 only!
Follow the tutorial below to unlock iPhone 4 iOS 4.2.1 with Ultrasnow 1.2 and jailbreak with Greenpoison RC5
Step1: Download TinyUmbrella here
Step2: Run TinyUmbrella and click “Start TSS Server”
Step 3: Run iTunes and connect your iPhone 4 to your PC via USB.
Step 4: Click on the restore button while holding “SHIFT” ( Windows ) or “ALT” ( Mac) and select iOS 4.2.1 [ Download iOS 4.2.1]
Step 5: While restoring iOS 4.2.1 to your iPhone 4 you will get a 1013 error, but don’t be scared, it’s normal, iOS 4.2.1 was already installed to your iPhone 4.
Step 6: Go back to TinyUmbrella and hit the “Exit Recovery” button to reboot your iPhone 4 ad exit recovery mode.
Step 7: Now you can safely jailbreak your iPhone 4 using Greenpoison RC5 [ Tutorial Here ].
Step 8: After the jailbreak process is complete, you can unlock your iPhone 4 iOS 4.2.1 using Ultrasnow 1.2.
There you have it, this was the complete tutorial on how to unlock iPhone 4 iOS 4.2.1. Stay tuned, and we’ll always keep you updated.
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about the author
Cosmin is a smartphone enthusiast that writes articles for our iPhone and Windows Phone 7 departments and he provides the latest jailbreaks and unlocks releases as well as hot news about Apple or Microsoft. His best friend is his iPhone 4 and he is always comparing smartphones with Adu.
