Error 1013!!? (iPhone IMEI: Unknown ICCDI: Unknown)

Hi,
Last week I updated my Iphone to 4.3.3 (it was 4.2.1). After two days, when I wanted to make a call but I couldn't. I realized that the network is lost and it is searching! I just tried to search the network manually, but it didn't fix. Then I turned it off and on! But as it turned on, I noticed a message that said my Iphone needed restore! Also, it said that "iPhone IMEI: Unknown ICCDI: Unknown". I tried to restore my Iphone through different ways, tiny umbrella was one of them. But it didn't work. Moreover, it is like a dead phone! In fact when I restore it, it seems that the process is finished but just at the end of restoration error 1013 pops out.
What should I do? Do you think that there is something wrong with its hardware or I can fix it by myself?
please help me!

Moreover, it is like a dead phone! In fact when I restore it, it seems that the process is finished but just at the end of restoration error 1013 pops out.
There's some advice on that one in the following document:
iTunes: Specific update-and-restore error messages and advanced troubleshooting

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