Is preserving an old-BR 3GS' BB now pointless?

[The Mad Hatter]

I have 2 old-bootrom 3GSs that have been AT&T unlocked.

My question is, do I still need to worry about doing a custom IPSW?

I was only preserving the original BB for these in order to use them abroad, or for resale value. So now I should be able to upgrade my JB to 5.1 with an unaltered IPSW file, right?

Just wanted some info before I possibly F'up these phones, and can't go back.

TIA

 

[dhlizard]

I have 2 old-bootrom 3GSs that have been AT&T unlocked.

My question is, do I still need to worry about doing a custom IPSW?

I was only preserving the original BB for these in order to use them abroad, or for resale value. So now I should be able to upgrade my JB to 5.1 with an unaltered IPSW file, right?

Just wanted some info before I possibly F'up these phones, and can't go back.

TIA

The only reason to preserve baseband was to have a baseband that Ultrasn0w could unlock.
If you have the IMEI unlock, preserving baseband is no longer required.

 

[Kyotoma]

I have 2 old-bootrom 3GSs that have been AT&T unlocked.

My question is, do I still need to worry about doing a custom IPSW?

I was only preserving the original BB for these in order to use them abroad, or for resale value. So now I should be able to upgrade my JB to 5.1 with an unaltered IPSW file, right?

Just wanted some info before I possibly F'up these phones, and can't go back.

TIA

You should have no problem upgrading to stock firmwares and then jailbreaking. So long as you don't have the iPad BB installed you can go to complete stock then directly to untethered via redsn0w.

 

[The Mad Hatter]

Thanks for the info guys...

I just wanted confirmation before I updated these phones.

 

[terraphantm]

With a factory unlock, preserving the baseband would only be useful if you're a hacker (or "security researcher") since having a working exploit could help you learn more about how the baseband works with everything else.