SIM800L network issue

Hi, I'm trying to connect SIM800L with Wind (Italian operator) SIM card, but it doesn't work.
With command "AT+CPIN?\n" it reply "ERROR", with "AT+CREG?\n" it reply "+CREG".
It's a 4G SIM card but I tryed to put it in a old 2G phone and it worked well.
So what is the problem? :cry:

Ok I tryied with:

"AT+CMEE=2\n"
"OK"

"AT+CPIN?\n"
"+CME ERROR: SIM not inserted"

But the SIM is inserted.

I tried with another one old expired micro SIM and the error message changed in "SIM wrong"