>> Hey, everyone. Welcome back to the course.
In the last video, we talked
about different types of mobile threats,
as well as some laws that you want to be aware of.
In this video, we're going to talk about things like
IMEI and ESN and talk about what those are.
IMEI is International Mobile Equipment Identifier.
It's going to be a 15 digit unique number.
Some of the things you'll want to remember for
your exam are, it's obtained
on your phone typing in the asterisk symbol,
the pound sign, 0, 6, and then pound,
so definitely remember that for your exam.
Then also remember the components of the number.
The first two digits
are going to be the reporting body ID
that's allocated to the type allocation code or TAC.
Also remember that TAC stands
for Type Allocation Code for your exam.
The next six are going to be the remainder of the TAC,
and then finally, we have
the serial sequence of the model,
and then the Luhn algorithm
check digit of the entire model.
The main things to remember there on this page
are going to be you type in the asterisk,
pound, 0, 6, pound.
Then also remembering that TAC
stands for a type allocation code.
We have our ESN number,
our Electronic Serial Number.
This is a 32-bit unique number,
it's attached on the chip inside of
the CDMA by the manufacturer themselves,
and then it can vary as
far as length wise of the manufacturer code.
It could be an 8-digit code and
then the 24 bits is a serial number,
or it can be flipped there,
and then it's 14 bits for
the manufacturer code and
then 18 bits for the serial number.
You might see a different ways based
on the particular manufacturer.
ICCID or the Integrated Circuit Card Identifier,
so this is one you'll
definitely want to know for your exam.
Now, so this one just identifies
your SIM card internationally.
The first two digits are going to
be the industry identifier.
The next two digits are going to be the country.
That's the country code or a country identifier.
Then we've got the issuer ID,
and then finally, the individual account ID.
Again, you want to remember these components
>> for the exam just in case
>> you see question's asking you like,
>> ''Hey, what are these two digits right here?''
IMSI or the International Mobile Subscriber Identity,
so this one is that 15 digit ID.
It describes a country and the mobile network
as well that the subscriber is a part of.
Then MSIN, the Mobile Subscriber Identification Number.
This is the actual identity of your mobile phone.
It identifies
mobile phone service provider within a network.
In this video, we talked about
>> some things like IMEI and
>> ESN as well as also MSIN.
We talked about what all of those are.
As I mentioned, some of these you just
want to know for the exam,
so make sure you study this
particular section pretty well.
In the next video, we're going to talk
about Android devices.
We'll talk about Android architecture
and some other things as well.