Step 1.

Since you aren't sure of the iPhone's history, it's best to restore it to 1.1.4 firmware and then use iLiberty+ to jailbreak and activate it.

OS X users click here to jailbreak and activate only. Then come back to this page and continue with the instructions below.

Step 2.

Launch the Installer. By default it opens on the Featured page.




Press the Sources button. Press Edit, then press Add.




Enter: hackthatphone.com/1.xml   Then press the OK button. After it refreshes the source, it will be back at this screen. Now press the Done button.





Press Refresh. The sources will be refreshed again.




You should now see Hack that Phone tools in your Sources list. Press the Install icon at the bottom. Scroll down to the Hack that Phone tools folder and press it.




Press Baseband Information and install it. Press the Home button when you are done and the SpringBoard will relaunch. Press the new icon that appears to launch the application.




The application will take a few seconds to pool all the data it needs. Once it is done, scroll down the screen until you see the entry for Bootloader Version.