iPhone 4 updated to 5.0.1 then downgraded to 4.2.1

[imean]

Hi,

i updated my iPhone 4 to ios 5.0.1 and then i downgrade it to 4.2.1 (i have SHSH) and i'm not able to unlock using gevey sim. baseband is (4.11.08)


any ideas??

thanks

[i.Annie]

You upgraded the baseband when you upgraded to iOS 5. You lost your unlockable baseband. You cannot downgrade basebands regardless of downgrading your firmware version.

Essentially, you lost your unlockability.

[imean]

Hi,

can i upgrade to iPad baseband (6.15) and unlock using ultrasn0w??

[i.Annie]

No. That only works on iPhone 3GS and iPhone 3G. Do not try it on your iPhone 4, you risk bricking your phone. And it won't work.