accidentally updated iphone 3G
Dear friends, I am in deep trouble. Please provide any valuable suggestions. I have an iphone 3G that I bought a year and half ago. It was on old bootroom and 3.1.3; jailbroken, unlocked and working perfectly.Yesterday, I left it connected to my PC and stepped aside meanwhile a message had popped on screen asking for update. My brother using the comp hit "update" since that's what most people normally do.
Now I am stuck on the emergency screen logo. I have no idea what ios my phone is updated to and what baseband it has now. I cannot google and find a solution since I dont know what version of ios did itunes update my 3G to. Please suggest what I should do? I will be very grateful for any help. Thanks a million for your time.