I have a 3GS 3.1.2 firmware 05.11.07 the version that requires blackra1n to be tethered on every reboot, and Im having the following problem:

I had wifi issues last week so I restored firmware 3.1.2 luckily I had saved Cydia shsh. Now I have the phone restored and Im still having wifi problems.

It actually detects the network and it detects my ip address and subnet mask but my router and dns entries are empty. Can someone please give me some guidance.

Thanks in advance.