Just upgraded form 1.1.1 to 1.1.2 to 1.1.3 and my phone and sms is working perfect. The problem is that I have no wifi (it does not assign an IP address) and no EDGE (does not keep settings after exiting configuration). I also cannot sync with itunes, nor I-Brickr or anything else. How can I downgrade to 1.1.1 or 1.1.2. Need your urgent help. I cannot even put the phone in DFU mode (power off + home).

Thanks in advance.