Jailbreaking 3GS 3.0 and upgrading to 4.3.3

[jonathan.iverson]

I am trying to jailbreak and unlock a 3GS running 3.0 but nothing I do will work. Every time I run redsn0w the pwned DFU mode fails as it does in Pwnage tool. Any ideas? Thanks.

[Mes]

If you want to unlock (use a non-authorized carrier), don't use Redsn0w. You must create a custom firmware using PwnageTool or Sn0wbreeze and install that. Only PwnageTool and Sn0wbreeze create custom firmwares. Redsn0w is mostly used by users who don't need an unlock.

Settings/General/About: What is the Modem Firmware version?

Also note: A 3GS requires SHSH blobs to load any firmware. TinyUmbrella The Firmware Umbrella - TinyUmbrella does 2 things: download and store all available SHSH blobs, and act as a server and provide the SHSH blob when loading a firmware. TU is not necessary for 4.3.3 because Apple is giving that away free today

[jonathan.iverson]

I use redsn0w just to get it into pwned dfu mode then cook a custom firmware with pwnagetool. But the phone fails each time I try to enter DFU and wont take a firmware in iTunes. I am running 04.26.08 baseband. Any ideas? Thanks.

[Mes]

Any iTunes error? What firmware are you trying to load? If it's 4.3.3, then check your hosts file and delete anything with *apple.com. The SHSH blob request should be going to apple.

When entering DFU mode on my 3GS, I must release the power button before 10 seconds (usually around 8 or 9 seconds).

[jonathan.iverson]

The iTunes error is usually "could not be restored because the firmware is not compatible." But the real problem is that it never goes into DFU mode correctly. I have tried to load 4.1, 4.3, and 4.3.3. Still no luck with any of them.

[Mes]

I edited my last post and added my personal issue with 'entering-DFU' mode. Did you see it? Try releasing the power button a bit early.