Kindle Keyboard (wifi/3G) unable to register

Hello all.. I've been on the phone with Amazon too many times to count, and here is a short story of the issue. Amazon removed my kindle registration during a cleanup of my MP3 authorized devices... I had not used the reader in a while, and just this weekend noticed that it was no longer registered to me. So when I tried to re-register it, I got a message that the kindle could not connect at this time.. (Even though the WIFI signal was fine) I also noticed that my Kindle would no longer connect to the 3G signal as a default. So after some research - i suspected that my kindle was blacklisted, and I tried to have Amazon remove it from the list. That did not work either. I've performed several factory resets, and still cannot get the 3G to work or the kindle to register to my account. I even tried to ENABLE_DIAGS on the device, and run the WAN test, but that test failed - with an error message & said the WAN could not be powered on. Anyone else seen this type of issue?

So my first question:
I am running software version (3.4), and would like to try a prior version to see if that fixes the problem - Is there a way to install a prior version ?

Second Question:
If I jailbreak the device, what (if any) utilities can I use to try and get the kindle registered again? I don't necessarily need 3G, but I think that has something to do with the fact that I cannot register it in the first place


any :help: would be appreciated - will be glad to send any diagnostic information that would help...

Dean