Full write up is over @ Breakfast with Unicorns
The gist:
You will need a pre .48 radio if you are on a 4.2.2 ROM. If you are on a 4.2.1 ROM, then you already have .33 and can move forward.
• Open up your phone dialer and punch in “ *#*#4636#*#* “
• Select Phone Information
• Scroll down...