Dowgrade firmware & baseband on iPhone4

[f-dizzle]

My friend had a Telus cell with firmware 4.1 and baseband 1.59.00. I unlocked and jailbroke it for him (used ultrasn0w for the unlock) so he could use it on the Rogers network. He updated the firmware, I'm guessing to 4.3.1 the other day and the baseband so he lost the unlock. If his SHSH blob was saved, is it possible to downgrade the firmware or more importantly the baseband so the iPhone is unlocked again?

[Cowboy]

If you save shsh you can downgrade fw but no he will be stuck on the new bb no way to downgrade that

[thecrunked]

baseband downgrade is not possible

if your friend really needs an unlock, he may want to check this out

Unlock 4.3.2 / 4.3.1 iPhone 4 (Any Baseband) With Permanent Unlock Solution | Redmond Pie