Unlock the iPhone 3G, 3GS on 05.11.07 baseband Using BlackSn0w (Park 2)

Step Seven

Press the Done button at the top right of the screen.




Step Eight

Press to select blackra1n.com from the list of sources.






Step Nine

Press to select blacksn0w from the list of packages.






Step Ten

Press the Install button at the top right of the screen.





Step Eleven

Press the Confirm button at the top right to begin installation.






Step Twelve

Once the unlock has been installed successfully press the large Return to Cydia button.





Step Thirteen

Wait a few minutes for your CommCenter to restart and you will now be able to use the SIM card of your choice on your unlocked iPhone





Enjoy it.

ref: http://www.iclarified.com/entry/index.php?enid=5900

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