My iPhone 2g stopped working

[sbryant]

I have a new 2g that had version 3.0 and when I connected to iTunes it upgraded to version 3.1 and now does not recognize my SIM card. It worked for abuot 24 hours and stopped. Can someone help me with what I need to do. I use Tmobile and they told me to go to this site but I have no idea what to do next.
Thank you so much!

[santaf]

you have to downgrade back to 3.0 jailbreak and unlock i'm not sure if there is an unlock yet for 3.1 but for the 2g i think there is a jailbreak but unfortunately you need the unlock also i'll see if i have me .ipsw that unlocked the 2g on 3.0 but i think i deleted it cause i dont' need unlock

also though i dont remember if i read correctly somewhere on this site if the 2g and 3g can downgrade to 3.0 just the 3gs cant i'm not sure