i have a oob 1.1.2 using 3gpp and got updated to 1.1.3 last nite.... i just found these steps to erase the baseband.... just wanted to ask everyone before trying... will it damage my iphone in anyway?????

and after doing those steps can i update to 1.1.2 and get the baseband 04.02.13_G

currently i managed to downgrade to 1.1.1 and jailbroke it....

http://docs.google.com/View?docid=dgzw9xs_4ft5qj3

waiting for ur helpful replies.....

This will not work, the guide you posted is not for iPhones with the 4.6 bootloader.

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US iPhone (1.1.2 OTB) on 2.2 with Pwnage

If you read the document it states:
"About 1.1.2 (out of the box) iPhones


This will NOT work with iPhones that originally came with firmware 1.1.2 (mainly phones sold in Europe). These phones use a different bootloader and god knows what happens if you try to restore older firmware on them.
You will not be able to "downgrade" the firmware on these phones because current tools will not be able to write to the baseband BECAUSE the bootloader has changed. We first need a new set of tools to do that."

So no, don't do it, this is what we (OTB 1.1.2) are waiting for!

1.1.3 would of come with a baseband upgrade anyway. From what I know you should NOT of upgraded... now I think you have to wait for the next version of firmware if you need to use a non approved mobile provider.

Why do you want to downgrade the baseband anyway?

you can't erase the bb, don't try

i wanna use the 3gpp sim that i purchased,,, it was workin perfectly till yesterday

then you shouldn't have stupidly upgraded your phone to 1.1.3 There have been a lot of discussions on this subject, people have been warning people not to update their iPhones, yet stupid people still wanna be more stupid LOL

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iPhone week 46 FW 1.1.2 BL 4.6 unlocked with GUNLOCK => TurboSim is now in the trash
Carrier Optus Australia, everything just works!

Yet another "i updated because i wanted to make sure, now i know and i want to downgrade back" thread.