Here are new details regarding the downgrade and unlock of iPhone 4 on 4.11.08 and 2.10.04 basebands. After long time of silence, the well-know iPhone unlocker, Sherif Hashim, and the guy behind ultrasn0w unlock has announced today about some news regarding 4.11.08 and 2.10.04 unlock.
As most of you know, ultrasn0w can unlock iPhone 4 up to 1.59.00 baseband. Higher basebands can be unlocked only with the help of Gevey SIM. But unfortunately Gevey SIM is limited up to 4.10.01 baseband. The biggest problem is unlocking iPhone 4 on 4.11.08 baseband. Sherif Hashim announced that he is working now on 4.11.08 and 2.10.04 unlock with ultrasn0w.
Sherif Hashim said:
YES i am still working on the VERY TIGHT bbfw 2.10-4.11
How to avoid falling in 4.11.08 trap ? iPhone 4 users who rely on unlock using ultrasn0w or Gevey SIM MUST stay away from updating their iPhone 4 to stock iOS 5.x.x. You must update your iPhone 4 via custom firmware to preserve the old unlockable basebands using Redsn0w, PwnageTool or Sn0wbreeze.
Downgrade / Unlock 4.11.08 and 2.10.04 Baseband iPhone 4 Release date :
Sherif Hashim did not announce about an official release date for 4.11.08 unlock, as such task is not the sort of thing that can be developed overnight.
NO NEED to ask because it won’t make it achievable/earlier/easier