I'm not an expert, but I know some of them faked IMEI/IMSI/some acronym numbers to pretend to be from the official carrier for the iPhone. IIRC, that is also il

I'm not an expert, but I know some of them faked IMEI/IMSI/some acronym numbers to pretend to be from the official carrier for the iPhone. IIRC, that is also illegal (as is the emergency services call in the newer ones).