IPhone 3G stuck in recovery mode - Help! (REAL tricky for those iTouch geniouses)?

So my brothers iPhone 3G (unknown baseband, unknown firmware) was given to my after my smartphone died. I did not know if it was jailbroken but I knew it was unlocked and since he had a password on it he didn't know what the code was, I decided to recover it and reset to factory default. Big mistake.

So below I have listen all I have done, and still have no success, if you can offer any suggestions it would be greatly appreciated!

1. First, I tried restarting my computer, reinstalling (the latest version) of iTunes, and used all 3 of my USB ports as well as two different iTouch cables to connect to my PC (running Windows 7) to confirm it was not a program or device problem.
2. I was then told to try the reset through iTunes, no luck.
3. I continued to redsn0w (latest version as well as prior versions) to either jailbreak, just boot, and put into DFU as well as PWNED DFU and restore with a custom firmware. No luck.
4. I used snowbreeze to create a custom firmware (v. 4.2.1 iPhone 3G) and no luck through iTunes either.
5. I then tried iReb as I was getting both 1015, 1604, and 1600 error messages. After selecting iPhone 3G and/or fixing the 1015 error message through iReb, still no luck.
6. I've tried restoring to both 4.2.1 custom and Apple stock firmware, as well as 3.1.3 (as I heard it may help) but still no luck.

More info
I do not know the baseband or firmware currently installed, and my phone is stuck in recovery mode. I have done many different suggestions and no luck

Use apple help store

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