So i followed the steps to jailbreak my 3g iphone. I had reception at first (it was activated). I downloaded pwnagetool, ran it and changed the settings so that it wouldn't put any custom logos and that it would erase everything (unticked the 'disable partition wipe-out,' and I think the problem might be here), and restored with with the custom .ipsw file. iPhone works But without reception

So no service. And I put my SIM card in my friend's iPhone and it works just fine.

Please help Thanks.

AH, i think it's because I forgot to uncheck "activate the phone." Now what do I do?