The first thing you need to think about
are these SIM cards.
So the SIM cards on present and modern iOS devices
are going to be digital SIM cards.
So you could hear these called eSIM or digital SIM.
When you look at the device, you actually
have to go into the phone settings
to see this information.
So here we can see the network is Verizon--
the carrier.
I have IMEI, which is my serial number; ICCID,
which is the serial number of my SIM card.
But then look at how I have MEID.
If you think about this, you're like, wait a second.
MEID, I thought, was CDMA.
IMEI is GSM.
Why does Heather have both?
Because I have Verizon, and I can
roam the world with this device.
So you can see carrier lock--
it says no SIM restrictions.
It can touch any network around.
Do you also notice I have IMEI2?
So when you see IMEI, IMEI2, it's
essentially two SIM cards in that device.
If you need to know what the most recent phone number is,
how many phone numbers the user has ever used,
there are three places you want to look.
The first, CellularUsage.db-- that
may not be leveraged on iOS 15, so be careful.
Com.apple.commcenter.plist and com.apple.commce
nter.data.plist--
these three files are going to store the information
about the SIM card.
They are on your cheat sheet.