I jailbreaked/unlocked my 1st generation iPhone on a 3.0 firmware successfully with PwnageTool 3.0.
But after DFU mode and going into iTunes and restoring it with the .ispw, it still pops up on error "The SIM card inserted in this iPhone does not appear to be supported

Also
My network on the iPhone says T-Mobile, so i know i unlocked it successfully.
And also I can receive calls but the screen is just the screen for emergencies, but iTunes can't support it.

Can anyone help me. Please.