IPhone :: Doesn't Get Signal

I've spent the past week poring over posts on here and on different sites, trying to educate myself as best I can so i can fix this issue. After hours and hours of banging my head against the wall, I can't figure anything out. My story goes:

- 2009 iPhone 3G updated to latest firmware/bootloader/baseband (3.1.3, 5.11.07, 5.09)
-Tried to jailbreak with pwnage tool 3.15 and accidentally checked "Activate iPhone"
-When restoring the custom pwnage firmware from iTunes, got a 16xx error
-Unplugged and tried to restore to original ipsw which i had backed up before
-This process looked like it went normal, but when it was finished the iPhone restarted into emergency call mode and iTunes gave the error The SIM card insterted in this iPhone does not appear to be supported (even though it is a functional ATT SIM tested and working in other ATT phones)
-I tried doing pwnage fresh without the activate iphone checked and it went through all the steps, this time without the error, but when it reset, it was still in emergency call mode.

Since then i tried numerous things to get it back to working status including, calling ATT, Apple, getting a new SIM, various Jailbreaks (Blackra1n, Spirit, redsn0w, pwnage), unlocks. Nothing worked -------> EXCEPT: When I run redsn0w, it goes through the JB, restarts and functions 100% normally, but THERE IS NO SIGNAL. I tried installing ultrasn0w through cydia, and all that does is change the signal from no bars "_ _ _ _ _" to "Searching".

So basically what I'm left with at this point is an oversized iPod touch. An iPhone that doesn't get signal. UGH.