http://www.phoneunlockingshop.ca Now offers Factory Unlocking Of Blacklisted iPhone 4. You can get it yours from there, they have excellent service & customer care.
Supported Basebands :
04.12.02, 04.12.05, 04.12.09
Supported Firmware Versions:
6.0, 6.0.1, 6.1, 6.1.2, 6.1.3, 7.0, 7.0.2, 7.0.3, 7.0.4, 7.0.6, 7.1, 7.1.1, 7.1.2
And All Other Firmwares & Basebands Of iPhone 4 Are supported !