Burn my friend Johnny told me that it works!
This is a description and video
This is the definitive method to downgrade the baseband of your iPhone.
We can do the downgrade of the baseband 01.59.00 (with iPhone 4 baseband 4.10.01, 3.10.01, 2.10.04). The downgrade of the iPhone 3GS baseband of 5.12.07 (iPhone 3GS baseband with 5.13.04, 5.14.02, 5.15.04, 5.16.02). We can do the downgrade of the baseband 05.11.07 (with iPhone 3G baseband 05.12.07, 05.13.04, 05.14.02, 05.15.04)
DOWNGRADE IPHONE DOWNLOAD