3GS (Old BR, Tmobile) 4.0 -> 4.2.1

[i228]

Hey everyone, I've been out of the jailbreaking loop for a while. I have a 3GS on the old bootrom and unlocked (I use Tmobile) on iOS 4.0, I want to upgrade to 4.2.1 and unlock or preserve baseband if possible. I tried jailbreaking 4.2.1 on a 3G last month and redsn0w kept crashing so it was a total fail. Are there currently any solutions for my needs yet?

[Simon]

you need a pwnage tool made custom firmware with no baseband update in it. You will still need redsnow after restoring to that custom firmware though to install cydia.

[i228]

I only have Windows

[Simon]

I can give you a link to a custom firmware, but like I said you still need to use redsnow 0.9.6rc8 before and after the restore.

[stana071]

I need a custom firmware 4.1 to keep baseband

i have an unlocked 3gs and want to upgrade from 4.0 to 4.1
-new boot
-bb 05.13.04
-have all SHSH from 4.0 and up
-i dont have the official sim

what steps do i need to follow to upgrade, jailbreak and unlock?

[Simon]

I need a custom firmware 4.1 to keep baseband

i have an unlocked 3gs and want to upgrade from 4.0 to 4.1
-new boot
-bb 05.13.04
-have all SHSH from 4.0 and up
-i dont have the official sim

what steps do i need to follow to upgrade, jailbreak and unlock?

You can use snowbreeze 2.1 to make one for yourself.

[stana071]

on windows?

can u tell me how?

[i228]

Ok, I will my shsh blobs (I used sn0wbreeze before and still have my custom firmware) the redsn0w I tried was b5 or b6 I believe

[Simon]

on windows?

can u tell me how?

HOW TO: Jailbreak iOS 4.1 with Sn0wbreeze 2.1

Ok, I will my shsh blobs (I used sn0wbreeze before and still have my custom firmware) the redsn0w I tried was b5 or b6 I believe

You cant use snowbreeze to make a custom 4.2.1

[i228]

HOW TO: Jailbreak iOS 4.1 with Sn0wbreeze 2.1



You cant use snowbreeze to make a custom 4.2.1

I meant I used it for 4.0, but I'll backup my SHSH blobs in case I run into issues with redsn0w again.