Q: Error 0xE8000004 when trying activate iPhone 4 (GSM)

Q: Error 0xE8000004 when trying activate iPhone 4 (GSM)

Hi there.

Two days ago I restore my iPhone 4 GSM from iTunes and when trying to activate it, I get the message Error 0xE80000004. I can not activate my iPhone 4 using wifi connection because asks me directly connect to iTunes and after displaying the error is not active and does not let me do anything.
I have restored my iPhone 4 from several PCs and always I get the same error when trying to activate it.
Can anyone help me please?