e’re happy to tell you that our ultrasn0w carrier unlock now supports the iPhone4!
Version 1.0-1 of ultrasn0w works for:
  • iPhone4 baseband 01.59
  • 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01 and 05.13.04

(If ultrasn0w doesn’t show when you search Cydia, add the repo: repo666.ultrasn0w.com)
For comments or questions, please use the comments section below.
Enjoy!

more info

Dev-Team Blog