Wanted to clarify before unlocking iPhone 4...

[LoneWolf121188]

I'm currently on AT&T, jailbroken, and on 4.1 and 2.10.04. I'll be traveling abroad starting monday and it would be nice to be able to get prepaid SIMs where I'm going, cut them down to Micro-SIM size, and be able to use my iPhone 4. So, to do this, do I just have to downgrade using these instructions, then run Ultrasn0w? That's it? Cydia has all my SHSHs on file since 4.0.

 

[PsstGreek]

I'm currently on AT&T, jailbroken, and on 4.1 and 2.10.04. I'll be traveling abroad starting monday and it would be nice to be able to get prepaid SIMs where I'm going, cut them down to Micro-SIM size, and be able to use my iPhone 4. So, to do this, do I just have to downgrade using these instructions, then run Ultrasn0w? That's it? Cydia has all my SHSHs on file since 4.0.

You can only downgrade if you have the shsh saved for the iOS. Even if you do downgrade you still won't be able to unlock your iPhone because the baseband stays the same.

2.10.04 can't be unlocked. The baseband can never be downgraded.

 

[LoneWolf121188]

You can only downgrade if you have the shsh saved for the iOS.

Cydia has all my SHSHs on file since 4.0.

Even if you do downgrade you still won't be able to unlock your iPhone because the baseband stays the same.

2.10.04 can't be unlocked. The baseband can never be downgraded.

I thought that was the whole point of TinyUmbrella? Follow this, plus TinyUmbrella?

 

[MaxBurn]

I would be super impressed if that did work. Comments on that article says it doesn't though.

 

[Myzhi]

I thought that was the whole point of TinyUmbrella? Follow this, plus TinyUmbrella?

Have old SHSH files saved, through TU or Cydia, allows you to downgrade the firmware, but it does not also downgrade the baseband. That's why the Dev Team always warns that if you want to keep the baseband updating you must use a custom firmware file. Otherwise, if the baseband also gets update, there's a chance you will loose the ability to block forever since baseband can't be downgraded.

 

[LoneWolf121188]

Have old SHSH files saved, through TU or Cydia, allows you to downgrade the firmware, but it does not also downgrade the baseband. That's why the Dev Team always warns that if you want to keep the baseband updating you must use a custom firmware file. Otherwise, if the baseband also gets update, there's a chance you will loose the ability to block forever since baseband can't be downgraded.

Gotcha, thanks.

 

[Applejuiced]

Like the rest said above, you're SOL at the moment. No unlock.