Can I update my iPhone version to a firmware if Apple stops signing it?

[Bacon Strips]

I know that people save SHSH blobs to downgrade firmwares if they accidentally updated but my question is let's say I have a 4.0.1 firmware iPhone 4 and Apple releases a new firmware with new baseband and ultrasn0w can't unlock it, would I be able to update to 4.3.3 from 4.0.1 when there's a newer firmware then 4.3.3?

[Cer0]

If you have the SHSH saved for 4.3.3 then you can. But after 5.0 there will be a block for SHSH for the moment. Apple implemented a new system in 5.0.

But if you have the 4.3.3 SHSH blob then you can still go to that.

[Mes]

... new firmware with new baseband and ultrasn0w can't unlock it...

Note: The baseband can not be downgraded even with saved SHSH blobs, only the iOS firmware version.

[Bacon Strips]

I know the baseband cannot be downgraded, I was just saying that once apple stops signing 4.3.3, would I be still be able to update my 4.0.1 iPhone 4 to 4.3.3....

[Mes]

Sure .. as long as you have 4.3.3 SHSH blobs saved.

[ihappy]

I know the baseband cannot be downgraded, I was just saying that once apple stops signing 4.3.3, would I be still be able to update my 4.0.1 iPhone 4 to 4.3.3....

Yes. As stated earlier as long as you have your SHSH blobs saved then you can update to 4.3.3.

[Bacon Strips]

Sorry to sound like a noob but how do I save 4.3.3 SHSH blobs if I'm on 4.0.1?

[Mes]

Tiny Umbrella The Firmware Umbrella - TinyUmbrella It will save what is available. iFaith will create SHSH blobs for the current running version (if TU doesn't find it already)

[ihappy]

Tiny Umbrella The Firmware Umbrella - TinyUmbrella It will save what is available. iFaith will create SHSH blobs for the current running version (if TU doesn't find it already)

+1. Since Apple is no longer signing any other firmwares the only firmware you will be allowed to restore/update to is 4.3.3 once Tiny Umbrella saves your SHSH blobs. iFaith does everything else

[Mes]

... the only firmware you will be allowed to restore/update to is 4.3.3 once Tiny Umbrella saves your SHSH blobs.

True ... unless Cydia had already saved them (or you got lucky ).

[ihappy]

Well thats what I meant by using iFaith but you had already covered that subject

[Mes]

. Believe it or not, I're read a couple posts of people who just purchased a new phone (not refurbished) and TU/Cydia reported saved SHSH blobs for an old version or two. The new owner was very lucky .

[ihappy]

Nice. Wish I had that kind of luck

[Mes]

Me too

[xboxbml]

Yeah TU will currently only save 4.3.4 as the window for 4.3.3 closed a couple days ago...I had similar luck with this brand new replacement 3GS I have now..it was swapped right after 4.3.1 came out. It came with 4.2.1. I ran TU and it found blobs for 4.1! Apple store girl assured me it was brand new and not a refurb....I dunno. Go figure..

[sephiroth726]

I tried something similar just going from 4.1 to 4.3 I downloaded from modmyi (before 4.3.4) I have shah blobs back to 4.1 unfortunately apple is checking your baseband now too so if they changed the baseband then no however nothing I'm aware of beside a PDF patch to stop jailbreak me was added so you should be ok...