<s>
The	O
iPhone	B-Device
XS	O
and	O
iPhone	B-Operating_System
XS	I-Operating_System
Max	I-Operating_System
(	O
stylized	O
and	O
marketed	O
as	O
iPhone	B-Device
and	O
iPhone	B-Device
Max	O
;	O
Roman	O
numeral	O
"	O
X	B-Operating_System
"	O
pronounced	O
"	O
ten	O
"	O
)	O
are	O
smartphones	B-Application
designed	O
,	O
developed	O
and	O
marketed	O
by	O
Apple	O
Inc	O
.	O
</s>
<s>
They	O
are	O
the	O
twelfth-generation	O
flagships	O
of	O
the	O
iPhone	B-Device
,	O
succeeding	O
the	O
iPhone	B-Operating_System
X	I-Operating_System
.	O
Apple	O
CEO	O
Tim	O
Cook	O
announced	O
the	O
devices	O
alongside	O
a	O
lower-end	O
model	O
,	O
the	O
iPhone	B-Operating_System
XR	I-Operating_System
,	O
on	O
September	O
12	O
,	O
2018	O
,	O
at	O
the	O
Steve	O
Jobs	O
Theater	O
at	O
Apple	O
Park	O
.	O
</s>
<s>
The	O
XS	O
Max	O
was	O
the	O
first	O
plus-sized	O
iPhone	B-Device
to	O
have	O
the	O
newer	O
reduced	O
bezel	O
form	O
factor	O
,	O
as	O
the	O
iPhone	B-Operating_System
X	I-Operating_System
did	O
not	O
have	O
a	O
larger	O
variant	O
.	O
</s>
<s>
Apple	O
no	O
longer	O
sells	O
the	O
iPhone	B-Device
XS	O
and	O
XS	O
Max	O
as	O
well	O
as	O
the	O
iPhone	B-Application
7	I-Application
and	O
its	O
Plus	O
variant	O
as	O
of	O
September	O
10	O
,	O
2019	O
,	O
after	O
the	O
iPhone	B-Operating_System
11	I-Operating_System
and	O
11	B-Operating_System
Pro	I-Operating_System
announcement	O
.	O
</s>
<s>
iPhone	B-Device
XS	O
and	O
XS	O
Max	O
are	O
the	O
final	O
models	O
of	O
iPhone	B-Device
to	O
feature	O
3D	O
Touch	O
.	O
</s>
<s>
The	O
iPhone	B-Device
XS	O
has	O
a	O
design	O
visually	O
near-identical	O
to	O
the	O
iPhone	B-Operating_System
X	I-Operating_System
but	O
includes	O
upgraded	O
hardware	O
,	O
featuring	O
the	O
A12	B-Device
Bionic	I-Device
chip	I-Device
built	O
with	O
a	O
7	B-Algorithm
nm	I-Algorithm
process	I-Algorithm
.	O
</s>
<s>
It	O
features	O
a	O
5.85	O
inch	O
(	O
149mm	O
)	O
OLED	B-Device
display	I-Device
(	O
marketed	O
as	O
5.8	O
inch	O
)	O
with	O
a	O
resolution	O
of	O
2436	O
×	O
1125	O
pixels	O
(	O
2.7	O
megapixels	O
)	O
at	O
458	O
ppi	B-Algorithm
and	O
contains	O
dual	O
12-megapixel	O
rear	O
cameras	O
and	O
one	O
7-megapixel	O
front-facing	O
camera	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
XS	I-Operating_System
Max	I-Operating_System
features	O
the	O
same	O
hardware	O
and	O
cameras	O
,	O
but	O
has	O
a	O
larger	O
6.46	O
inch	O
(	O
164mm	O
)	O
OLED	B-Device
display	I-Device
(	O
marketed	O
as	O
6.5	O
inch	O
)	O
with	O
a	O
resolution	O
of	O
2688	O
×	O
1242	O
pixels	O
(	O
3.3	O
megapixels	O
)	O
at	O
458	O
ppi	B-Algorithm
and	O
a	O
larger	O
battery	O
(	O
3,174	O
mAh	O
)	O
.	O
</s>
<s>
It	O
was	O
also	O
noted	O
by	O
the	O
media	O
that	O
the	O
XS	O
received	O
a	O
smaller	O
battery	O
than	O
that	O
of	O
the	O
X	B-Operating_System
(	O
dropping	O
to	O
2,658	O
mAh	O
from	O
2,716	O
mAh	O
)	O
.	O
</s>
<s>
The	O
XS	O
 '	O
battery	O
is	O
a	O
new	O
single-cell	O
L-shaped	O
battery	O
,	O
while	O
the	O
iPhone	B-Operating_System
XS	I-Operating_System
Max	I-Operating_System
battery	O
remains	O
two	O
cells	O
like	O
the	O
iPhone	B-Operating_System
X	I-Operating_System
.	O
Additionally	O
,	O
Apple	O
states	O
that	O
the	O
iPhone	B-Device
XS	O
lasts	O
up	O
to	O
30	O
minutes	O
longer	O
than	O
iPhone	B-Operating_System
X	I-Operating_System
,	O
while	O
the	O
iPhone	B-Operating_System
XS	I-Operating_System
Max	I-Operating_System
lasts	O
up	O
to	O
1.5	O
hours	O
longer	O
than	O
iPhone	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
Apple	O
claims	O
that	O
the	O
devices	O
have	O
faster	O
Face	O
ID	O
technology	O
than	O
the	O
iPhone	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
It	O
was	O
also	O
announced	O
in	O
June	O
2019	O
at	O
WWDC	O
that	O
Face	O
ID	O
on	O
iPhone	B-Device
XS	O
,	O
iPhone	B-Operating_System
XS	I-Operating_System
Max	I-Operating_System
,	O
iPhone	B-Operating_System
XR	I-Operating_System
and	O
iPhone	B-Operating_System
X	I-Operating_System
would	O
be	O
made	O
up	O
to	O
30%	O
faster	O
with	O
iOS	O
13	O
,	O
which	O
was	O
released	O
on	O
September	O
19	O
,	O
2019	O
.	O
</s>
<s>
This	O
is	O
an	O
improvement	O
over	O
the	O
IP67	O
water	O
resistance	O
of	O
the	O
iPhone	B-Operating_System
8	I-Operating_System
and	O
X	B-Operating_System
.	O
Apple	O
has	O
performed	O
tests	O
in	O
various	O
liquids	O
including	O
chlorinated	O
water	O
,	O
salt	O
water	O
,	O
tea	O
,	O
wine	O
,	O
beer	O
and	O
juices	O
.	O
</s>
<s>
iPhone	B-Device
cameras	O
,	O
starting	O
with	O
the	O
iPhone	B-Operating_System
6S	I-Operating_System
,	O
had	O
a	O
12MP	O
(	O
1/2.94	O
"	O
)	O
sensor	O
size	O
with	O
a	O
1.22	O
μm	O
pixel	O
size	O
.	O
</s>
<s>
The	O
iPhone	B-Device
XS	O
,	O
XS	O
Max	O
and	O
XR	O
are	O
the	O
first	O
ones	O
to	O
record	O
stereo	O
audio	O
for	O
videos	O
.	O
</s>
<s>
Starting	O
with	O
the	O
iPhone	B-Device
2018	O
lineup	O
(	O
iPhone	B-Device
XS	O
,	O
iPhone	B-Operating_System
XS	I-Operating_System
Max	I-Operating_System
and	O
iPhone	B-Operating_System
XR	I-Operating_System
)	O
,	O
these	O
cameras	O
were	O
updated	O
to	O
a	O
12MP	O
(	O
1/2.55	O
"	O
)	O
sensor	O
size	O
with	O
a	O
1.4	O
μm	O
pixel	O
size	O
,	O
the	O
same	O
sensor	O
and	O
pixel	O
size	O
as	O
the	O
primary	O
cameras	O
of	O
the	O
Samsung	B-Application
Galaxy	I-Application
S10	I-Application
,	O
Samsung	B-Application
Galaxy	I-Application
S9	I-Application
Samsung	B-Application
Galaxy	I-Application
S8	I-Application
Samsung	B-Application
Galaxy	I-Application
S7	I-Application
,	O
Pixel	B-Device
2	I-Device
,	O
Pixel	B-Device
3a	I-Device
and	O
Pixel	B-Device
3a	I-Device
XL	I-Device
,	O
Pixel	B-Device
3	I-Device
and	O
Pixel	B-Device
3	I-Device
XL	I-Device
.	O
</s>
<s>
The	O
iPhone	B-Device
XS	O
received	O
generally	O
positive	O
reviews	O
from	O
critics	O
after	O
release	O
.	O
</s>
<s>
iPhone	B-Device
XS	O
and	O
XS	O
Max	O
users	O
initially	O
had	O
issues	O
with	O
LTE	O
,	O
Wi-Fi	O
reception	O
and	O
Bluetooth	B-Protocol
connections	O
.	O
</s>
<s>
Some	O
experts	O
claimed	O
that	O
a	O
faulty	O
antenna	O
was	O
to	O
blame	O
,	O
and	O
in	O
response	O
to	O
many	O
consumer	O
complaints	O
about	O
iPhone	B-Device
XS/XS	O
Max	O
connectivity	O
problems	O
,	O
Apple	O
contacted	O
users	O
for	O
help	O
with	O
their	O
investigation	O
.	O
</s>
<s>
To	O
resolve	O
some	O
problems	O
with	O
the	O
XS/XS	O
Max	O
,	O
Apple	O
pushed	O
the	O
iOS	B-Operating_System
12.0.1	I-Operating_System
update	O
on	O
October	O
8	O
,	O
2018	O
,	O
which	O
,	O
along	O
with	O
addressing	O
the	O
Chargegate	O
issue	O
,	O
fixed	O
a	O
connectivity	O
issue	O
where	O
Bluetooth	B-Protocol
could	O
become	O
temporarily	O
unavailable	O
on	O
the	O
XS/XS	O
Max	O
.	O
</s>
<s>
Users	O
reported	O
problems	O
charging	O
the	O
iPhone	B-Device
XS	O
and	O
XS	O
Max	O
with	O
a	O
Lightning	B-Architecture
cable	I-Architecture
,	O
where	O
the	O
device	O
would	O
fail	O
to	O
charge	O
if	O
it	O
had	O
been	O
off	O
for	O
a	O
while	O
,	O
and	O
would	O
only	O
begin	O
to	O
charge	O
if	O
the	O
screen	O
was	O
turned	O
on	O
.	O
</s>
<s>
This	O
would	O
occur	O
due	O
to	O
a	O
software	O
bug	O
with	O
Apple	O
's	O
"	O
Disable	O
USB	B-Protocol
accessories	O
when	O
locked	O
"	O
setting	O
,	O
a	O
feature	O
intended	O
to	O
prevent	O
unknown	O
devices	O
from	O
accessing	O
a	O
user	O
's	O
content	O
within	O
an	O
iPhone	B-Device
.	O
</s>
<s>
This	O
issue	O
,	O
along	O
with	O
Bluetooth	B-Protocol
connectivity	O
problems	O
,	O
was	O
resolved	O
with	O
the	O
release	O
of	O
iOS	B-Operating_System
12.0.1	I-Operating_System
on	O
October	O
8	O
,	O
2018	O
.	O
</s>
<s>
This	O
technology	O
combines	O
multiple	O
photos	O
of	O
varying	O
exposures	O
to	O
increase	O
dynamic	O
range	O
on	O
the	O
iPhones	B-Device
 '	O
photos	O
,	O
but	O
can	O
also	O
lead	O
to	O
less	O
pronounced	O
facial	O
imperfections	O
and	O
decreased	O
highlights	O
in	O
selfies	O
.	O
</s>
<s>
Some	O
speculated	O
this	O
was	O
the	O
result	O
of	O
a	O
hidden	O
"	O
beauty	O
mode	O
"	O
(	O
an	O
actual	O
feature	O
in	O
some	O
smartphones	B-Application
)	O
and	O
dubbed	O
the	O
issue	O
"	O
Beautygate	O
"	O
.	O
</s>
<s>
The	O
issue	O
was	O
resolved	O
with	O
the	O
release	O
of	O
iOS	B-Operating_System
12.1	I-Operating_System
on	O
October	O
30	O
,	O
2018	O
.	O
</s>
<s>
The	O
iPhone	B-Device
XS	O
 '	O
camera	O
was	O
criticized	O
for	O
not	O
featuring	O
a	O
night	O
mode	O
.	O
</s>
<s>
iOS	O
13	O
did	O
not	O
include	O
night	O
mode	O
which	O
was	O
kept	O
exclusive	O
to	O
the	O
new	O
iPhone	B-Operating_System
11	I-Operating_System
.	O
</s>
<s>
However	O
,	O
third-party	O
apps	O
brought	O
similar	O
Night	O
Mode	O
to	O
older	O
iPhones	B-Device
.	O
</s>
