<s>
The	O
iPhone	B-Operating_System
is	O
a	O
line	O
of	O
smartphones	B-Application
designed	O
and	O
marketed	O
by	O
Apple	O
Inc	O
.	O
that	O
use	O
Apple	O
's	O
iOS	B-Application
mobile	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
.	O
</s>
<s>
The	O
first-generation	B-Operating_System
iPhone	I-Operating_System
was	O
announced	O
by	O
former	O
Apple	O
CEO	O
Steve	O
Jobs	O
on	O
January	O
9	O
,	O
2007	O
.	O
</s>
<s>
Since	O
then	O
,	O
Apple	O
has	O
annually	O
released	O
new	O
iPhone	B-Operating_System
models	O
and	O
iOS	B-Application
updates	O
.	O
</s>
<s>
iPhone	B-Operating_System
naming	I-Operating_System
has	O
followed	O
various	O
patterns	O
throughout	O
its	O
history	O
.	O
</s>
<s>
iPhones	B-Operating_System
are	O
named	O
with	O
"	O
iPhone	B-Operating_System
"	O
followed	O
by	O
a	O
number	O
,	O
which	O
denotes	O
the	O
iPhone	B-Operating_System
generation	O
,	O
and	O
sometimes	O
a	O
suffix	O
(	O
such	O
as	O
C	O
,	O
S	O
,	O
Plus	O
,	O
Pro	O
,	O
Pro	O
Max	O
)	O
.	O
</s>
<s>
The	O
current	O
naming	O
pattern	O
is	O
that	O
"	O
Plus	O
"	O
or	O
"	O
Max	O
"	O
indicates	O
a	O
physical	O
larger	O
iPhone	B-Operating_System
model	O
of	O
the	O
same	O
generation	O
(	O
iPhone	B-Operating_System
XS	I-Operating_System
Max	I-Operating_System
,	O
11	B-Operating_System
Pro	I-Operating_System
Max	O
,	O
12	B-Operating_System
Pro	I-Operating_System
Max	O
,	O
13	O
Pro	O
Max	O
,	O
14	O
Plus	O
,	O
14	O
Pro	O
Max	O
)	O
.	O
</s>
<s>
"	O
Pro	O
"	O
indicates	O
the	O
higher	O
end	O
model	O
(	O
iPhone	B-Operating_System
12	I-Operating_System
Pro	I-Operating_System
,	O
13	O
Pro	O
,	O
14	O
Pro	O
)	O
.	O
</s>
<s>
without	O
a	O
suffix	O
)	O
indicate	O
the	O
lower-priced	O
iPhones	B-Operating_System
(	O
iPhone	B-Operating_System
11	I-Operating_System
,	O
12	O
,	O
13	O
,	O
14	O
)	O
.	O
</s>
<s>
The	O
"	O
SE	O
"	O
used	O
in	O
the	O
iPhone	B-Operating_System
SE	I-Operating_System
line	O
stands	O
for	O
"	O
Special	O
Edition	O
"	O
.	O
</s>
<s>
"	O
S	O
"	O
used	O
to	O
denote	O
a	O
slight	O
upgrade	O
(	O
iPhone	B-Operating_System
3GS	I-Operating_System
,	O
4S	O
,	O
5S	B-Operating_System
,	O
6S	O
&	O
6S	O
Plus	O
,	O
XS	O
&	O
XS	B-Operating_System
Max	I-Operating_System
)	O
,	O
but	O
it	O
has	O
since	O
been	O
dropped	O
;	O
iPhone	B-Operating_System
XS	I-Operating_System
and	O
XS	B-Operating_System
Max	I-Operating_System
were	O
the	O
last	O
models	O
to	O
feature	O
the	O
"	O
S	O
"	O
(	O
iPhone	B-Operating_System
12	I-Operating_System
,	O
12	B-Operating_System
Pro	I-Operating_System
,	O
12	B-Operating_System
Pro	I-Operating_System
Max	O
instead	O
of	O
iPhone	B-Operating_System
11S	I-Operating_System
,	O
11S	O
Pro	O
,	O
11S	O
Pro	O
Max	O
)	O
.	O
</s>
<s>
"	O
C	O
"	O
used	O
to	O
denote	O
the	O
lower-priced	O
and	O
smaller	O
sized	O
iPhones	B-Operating_System
(	O
iPhone	B-Operating_System
5C	I-Operating_System
)	O
.	O
</s>
<s>
iPhone	B-Operating_System
X	I-Operating_System
(	O
pronounced	O
"	O
10	O
"	O
)	O
,	O
iPhone	B-Operating_System
XR	I-Operating_System
(	O
pronounced	O
"	O
10R	O
"	O
)	O
and	O
iPhone	B-Operating_System
XS	I-Operating_System
and	O
XS	B-Operating_System
Max	I-Operating_System
(	O
pronounced	O
"	O
10S	O
"	O
)	O
are	O
currently	O
the	O
only	O
iPhones	B-Operating_System
to	O
have	O
been	O
branded	O
with	O
roman	O
numerals	O
(	O
X	O
)	O
.	O
</s>
<s>
38	O
different	O
iPhone	B-Operating_System
models	O
have	O
been	O
produced	O
:	O
</s>
<s>
No	O
models	O
called	O
the	O
iPhone	B-Operating_System
2	I-Operating_System
,	O
iPhone	B-Application
7S	I-Application
,	O
iPhone	B-Operating_System
8S	I-Operating_System
,	O
iPhone	B-Operating_System
9	O
,	O
iPhone	B-Operating_System
11S	I-Operating_System
,	O
iPhone	B-Operating_System
12S	I-Operating_System
and	O
iPhone	B-Operating_System
13S	I-Operating_System
were	O
ever	O
produced	O
;	O
however	O
,	O
iPhone	B-Operating_System
9	O
was	O
the	O
rumored	O
name	O
for	O
the	O
iPhone	B-Operating_System
SE	I-Operating_System
(	O
2020	O
)	O
.	O
</s>
<s>
The	O
1st-generation	B-Operating_System
iPhone	I-Operating_System
was	O
colloquially	O
known	O
,	O
retronymically	O
,	O
as	O
the	O
iPhone	B-Operating_System
2G	I-Operating_System
,	O
as	O
the	O
2nd	O
generation	O
iPhone	B-Operating_System
was	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
4	I-Operating_System
did	O
not	O
support	O
4G	B-Architecture
;	O
the	O
iPhone	B-Operating_System
5	I-Operating_System
was	O
the	O
first	O
with	O
LTE	O
support	O
,	O
while	O
the	O
iPhone	B-Operating_System
12	I-Operating_System
and	O
12	B-Operating_System
Pro	I-Operating_System
were	O
the	O
first	O
with	O
5G	O
support	O
.	O
</s>
