[Nikos]

I upgraded to 1.1.1 on my UNLOCKED iPhone. I am using a T-Mobile SIM card.

After updating, my phone was asking me to re-activate. I tried downloading the newest 1.1.1 firmware and activating via iNdependence but no dice.

Now I can't get into recovery mode to try a store via iTunes for some reason. When I connect my phone to iTunes, I'm told there is an incorrect SIM.

Even the original SIM card is showing up as unsupported in iTunes now!

Cliff notes: DO NOT upgrade your unlocked iPhones just yet.

EDIT: So I found out the hard way that you should NOT upgrade your unlocked phone yet. Once you go 1.1.1, you CAN'T go back. Not even using the shift+click restore method in iTunes. There's no way at the moment, and for now I am stuck with a non functioning iPhone.