Before you attempt to take apart your iPhone I would suggest you get a professional opinion regarding your problem. A comm board is not cheap, it cost about $150 and isn't very easy to replace either as it requires a little bit of soldering and its also kind of hard to open up the case.
i tried a million times to upgrade to 111 but cant because everytime i try to activate i have "no wifi" so i cant do a wireless activation. whenever i downgrade to 102 my wifi works, so i doubt that its the hardware. i upgraded to 112 just to see about the wifi thing and its still grayed out. i somehow managed to upgrade to 111 and managed to jailbreak without needing a wifi connection, but whats the point if i dont have wifi. if i cant SSH my phone then its pointless.
Yes, thanks for attempting once again to solve our problem, but there's does seem to be a large group of us for whom no tutorial will 'fix' our phones.
Off hand, do you know a site which explains how to fix the comm board and where to get one? Not that I've given up hope entirely yet, but....