I have a huge problem. I've already searched the net for solutions and have applied most of them but it just didn't fix the problem.

previously jailbroken using pwnagetool. after few months the 3G and wifi lost its function to connect to the net. Then a month after signal is lost. So basically, no net, no text and no calls.

I tried to rejailbreak again using pwnagetool and then blackra1n but same result. I also restored 3.1.2 using itunes but same result.

Somebody suggested i upgrade to 3.1.3 which i did. But i got stuck in activation screen. The phone can't seem to activate even with the official sim.

And now i ran out of options.

Please help. Thanks.