iphone 3.1.2 with baseband 5.11

[ZippyDan]

i've got two iphones 3GS

one came with 3.0.1 and i easily was able to use pwnagetool to get to 3.1.2 without updating my baseband

i've got another 3GS that came preloaded with 3.1.2, the new baseband, and i presume the new bootloader

following the exact same steps i used for my phone, i was able to load the custom firmware to the phone, but after that, i got nothing from the iphone: screen was off, no response to any button press. thankfully, itunes was still able to recognize it in itunes and i was able to restore to default firmware

i have been able to jailbreak this phone successfully using blackra1n, but i hate tethered jailbreaks

am i doing something wrong? do i have to follow a different procedure with a 3gs that comes preloaded with 3.1.2?

thanks for your help.

[soulthoughts]

If you have the new bootrom, you're stuck with a tethered jailbreak.

[ZippyDan]

that was the info i needed thank. this part from the pwnagetool website made me think it could be done:

"Note for 3GS users not already jailbroken and stuck at 3.1.x: this version of PwnageTool has a side feature to jailbreak your 3GS."