8gb 3G firmware: 2.1 (5F136) Baseband:02.11.07
I would like to jailbreak, and unlock the phone. To do so I know I need to update the baseband to 2.28 in order for it to work with Yellowsn0w 0.9.8.

Here is my question, I would assume that I could use Quickpwn 225-2 and this guide: iClarified - iPhone - How to Jailbreak Your 2.x.x 3G iPhone Using QuickPwn (Windows) , use the iPhone1,2_2.2_5G77_Restore.ipsw file and upgrade the firmware to 2.2. Would applying the 2.2 firmware listed above also upgrade the baseband to 2.28, or would it take it to 2.30, thus killing my ability to run Yellowsn0w on it for the unlock?

I see on the iphone dev blog "#GOLDEN RULE: If you have a 3G iPhone running 2.2 firmware and you want to keep your ability to use yellowns0w (or the option to use it in the future) do NOT use QuickPwn, and do not use the official ipsw or the iTunes update process without using PwnageTool." I'm fine with staying on 2.2, and wouldn't use the official ipsw..rather I'd grab the one from the quickpwn link above, so I think I'd be safe? Am I missing anything, or totally not understanding something about the unlock/jailbreak? I've tried doing as much research as possible before coming here to ask the experts, and wanted to ensure I was on the right track. Any advice? Thanks!

If you restore/upgrade from 2.1 to 2.2 you will then be on 02.28 baseband, the golden rule for yellowsn0w to work is to not restore with a stock 2.2.1 firmware & end up on 02.30 BB

So just update to 2.2 follow the Quickpwn guide & you should be fine

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