Last year we provided a procedure to Activate iPhone 3.0 beta and as promised, we are back with a tutorial on how to active the iPhone 4.0 Firmware for your device which will enable you to install the firmware and test it.

Activating the firmware is equivalent of to getting the UDID of your device registered in the iPhone developer program so you are legally able to test the new firmware on your device without any syncing problems with iTunes.
Register the Unique Device ID (UDID)
Now you won't be able to do this unless you have a iPhone developer account yourself which costs $100 a year; or have a friend who is enrolled into the program and willing to do the favor. But we here are giving you a chance to get this for free. Here is what you have to do:
- Connect your device (iPhone or iPod Touch) to the computer.
- Open iTunes and click on the Summary for the device.
- Hover the mouse over to where it says 'Serial Number' and click on it such that to make it toggle into Unique Device ID (UDID).
- Note down the UDID very carefully; better write it down somewhere.
- Head over to this form, enter the details and wait for a couple of hours.
- Comment on this post and tell us which one of the 7 tentpole features for iPhone OS 4.0 is your favorite.
That's it! Carefully follow the steps above and your Unique Device ID will be registered.
Important: This is a first-come-first-serve offer so make sure to follow the steps accordingly. Those who fill up the form but do not leave a comment as mentioned would not be entertained. Oh and please use the same name/email in the comment and activation form.
Update: The iPhone 4.0 beta 2 firmware is now available for download. Links for developers and users have been provided.