<s>
The	O
Pixel	B-Device
4	I-Device
and	O
Pixel	B-Device
4	I-Device
XL	I-Device
are	O
a	O
pair	O
of	O
Android	B-Application
smartphones	B-Application
designed	O
,	O
developed	O
,	O
and	O
marketed	O
by	O
Google	B-Application
as	O
part	O
of	O
the	B-Application
Google	I-Application
Pixel	B-Device
product	O
line	O
.	O
</s>
<s>
They	O
collectively	O
serve	O
as	O
the	O
successors	O
to	O
the	O
Pixel	B-Device
3	I-Device
and	O
Pixel	B-Device
3	I-Device
XL	I-Device
.	O
</s>
<s>
They	O
were	O
officially	O
announced	O
on	O
October	O
15	O
,	O
2019	O
at	O
the	O
Made	O
by	O
Google	B-Application
event	O
and	O
released	O
in	O
the	O
United	O
States	O
on	O
October	O
24	O
,	O
2019	O
.	O
</s>
<s>
On	O
September	O
30	O
,	O
2020	O
,	O
they	O
were	O
succeeded	O
by	O
the	O
Pixel	B-Device
5	I-Device
.	O
</s>
<s>
Google	B-Application
confirmed	O
the	O
device	O
's	O
design	O
in	O
June	O
2019	O
after	O
renders	O
of	O
it	O
were	O
leaked	O
online	O
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
the	O
Pixel	B-Device
4	I-Device
is	O
the	O
first	O
Pixel	B-Device
phone	O
to	O
be	O
offered	O
for	O
sale	O
by	O
all	O
major	O
wireless	O
carriers	O
at	O
launch	O
.	O
</s>
<s>
Previous	O
flagship	O
Pixel	B-Device
models	O
had	O
launched	O
as	O
exclusives	O
to	O
Verizon	B-Application
and	O
Google	B-Application
Fi	I-Application
;	O
the	O
midrange	O
Pixel	B-Device
3a	I-Device
was	O
additionally	O
available	O
from	O
Sprint	O
and	O
T-Mobile	O
,	O
but	O
not	O
AT&T	O
,	O
at	O
its	O
launch	O
.	O
</s>
<s>
As	O
with	O
all	O
other	O
Pixel	B-Device
releases	O
,	O
Google	B-Application
is	O
offering	O
unlocked	O
U.S.	O
versions	O
through	O
its	O
website	O
.	O
</s>
<s>
On	O
January	O
10	O
,	O
2020	O
,	O
Pixel	B-Device
4	I-Device
price	O
dropped	O
below	O
the	O
Black	O
Friday	O
prices	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
and	O
4	O
XL	O
are	O
constructed	O
using	O
an	O
aluminum	O
frame	O
and	O
Gorilla	O
Glass	O
5	O
.	O
</s>
<s>
Both	O
have	O
stereo	O
speakers	O
,	O
but	O
unlike	O
the	O
Pixel	B-Device
3	I-Device
,	O
only	O
one	O
of	O
the	O
speakers	O
is	O
front-firing	O
,	O
with	O
the	O
other	O
speaker	O
located	O
to	O
the	O
right	O
of	O
the	O
USB-C	O
port	O
.	O
</s>
<s>
Neither	O
model	O
includes	O
a	O
fingerprint	O
reader	O
;	O
facial	O
recognition	O
(	O
using	O
a	O
dot	O
projector	O
,	O
infrared	O
emitters	O
and	O
cameras	O
along	O
the	O
top	O
bezel	O
of	O
the	O
device	O
)	O
is	O
the	O
only	O
biometric	O
authentication	O
method	O
offered	O
by	O
the	O
Pixel	B-Device
4	I-Device
.	O
</s>
<s>
Both	O
models	O
use	O
the	O
Qualcomm	O
Snapdragon	O
855	O
system-on-chip	O
(	O
consisting	O
of	O
eight	O
Kryo	O
485	O
CPU	O
cores	O
,	O
an	O
Adreno	B-General_Concept
640	I-General_Concept
GPU	O
and	O
a	O
Hexagon	B-General_Concept
690	I-General_Concept
DSP	B-Architecture
)	O
,	O
with	O
6GB	O
of	O
LPDDR4X	O
RAM	O
.	O
</s>
<s>
Battery	O
sizes	O
differ	O
,	O
with	O
the	O
Pixel	B-Device
4	I-Device
using	O
a	O
2800mAh	O
cell	O
and	O
the	O
Pixel	B-Device
4	I-Device
XL	I-Device
using	O
a	O
3700mAh	O
cell	O
.	O
</s>
<s>
Both	O
are	O
capable	O
of	O
fast-charging	O
at	O
up	O
to	O
18W	O
,	O
and	O
support	O
Qi	O
wireless	B-Application
charging	I-Application
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
also	O
features	O
the	O
Pixel	B-Device
Neural	O
Core	O
and	O
Knowles	O
8508A	O
audio	O
processor	O
.	O
</s>
<s>
The	O
Pixel	B-Device
Neural	O
Core	O
is	O
the	O
successor	O
to	O
the	O
Pixel	B-Device
Visual	I-Device
Core	I-Device
;	O
it	O
,	O
too	O
,	O
uses	O
the	O
Edge	O
TPU	O
architecture	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
features	O
an	O
OLED	B-Device
display	I-Device
manufactured	O
by	O
Samsung	O
with	O
HDR	B-Application
support	O
,	O
that	O
operates	O
at	O
a	O
refresh	O
rate	O
of	O
up	O
to	O
90Hz	O
;	O
it	O
dynamically	O
adjusts	O
depending	O
on	O
content	O
to	O
preserve	O
battery	O
life	O
.	O
</s>
<s>
Both	O
models	O
use	O
a	O
wider	O
19:9	O
aspect	B-General_Concept
ratio	I-General_Concept
,	O
with	O
the	O
Pixel	B-Device
4	I-Device
using	O
a	O
1080p	O
panel	O
,	O
and	O
the	O
4	O
XL	O
using	O
a	O
1440p	O
panel	O
.	O
</s>
<s>
Unlike	O
the	O
Pixel	B-Device
3	I-Device
XL	I-Device
,	O
the	O
Pixel	B-Device
4	I-Device
XL	I-Device
's	O
display	O
does	O
not	O
contain	O
a	O
cutout	O
,	O
or	O
notch	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
includes	O
dual	O
rear-facing	O
cameras	O
located	O
within	O
a	O
raised	O
square	O
module	O
.	O
</s>
<s>
It	O
houses	O
a	O
wide	O
28mm	O
77°	O
1.7	O
lens	O
with	O
the	O
same	O
Sony	O
Exmor	O
IMX363	O
12.2-megapixel	O
sensor	O
as	O
on	O
the	O
Pixel	B-Device
3	I-Device
and	O
3a	O
,	O
and	O
a	O
second	O
telephoto	O
48mm	O
2.4	O
lens	O
with	O
a	O
16-megapixel	O
sensor	O
.	O
</s>
<s>
Both	O
are	O
capable	O
of	O
recording	O
video	O
at	O
4K	B-Architecture
resolution	I-Architecture
,	O
but	O
can	O
only	O
do	O
so	O
at	O
30fps	O
whereas	O
most	O
competitors	O
support	O
60fps	O
as	O
well	O
.	O
</s>
<s>
In	O
a	O
tweet	O
,	O
Google	B-Application
stated	O
that	O
"	O
We	O
find	O
that	O
the	O
majority	O
of	O
users	O
stick	O
with	O
1080p	O
,	O
so	O
we	O
focus	O
our	O
energy	O
on	O
improving	O
our	O
quality	O
in	O
this	O
mode	O
,	O
versus	O
enabling	O
a	O
4k	B-Architecture
60fps	O
mode	O
that	O
could	O
use	O
up	O
to	O
half	O
a	O
gigabyte	O
of	O
storage	O
every	O
minute	O
"	O
.	O
</s>
<s>
Google	B-Application
claims	O
the	O
Pixel	B-Device
4	I-Device
can	O
capture	O
8x	O
zoom	O
at	O
near-optical	O
quality	O
.	O
</s>
<s>
Additionally	O
,	O
it	O
uses	O
Google	B-Application
Camera	I-Application
7.1	I-Application
with	O
software	O
enhancements	O
,	O
including	O
Live	O
HDR+	O
with	O
dual	O
exposure	O
controls	O
,	O
improved	O
Night	O
Sight	O
with	O
Astrophotography	O
mode	O
and	O
improved	O
Portrait	O
Mode	O
with	O
more	O
realistic	O
Bokeh	O
.	O
</s>
<s>
It	O
includes	O
a	O
single	O
ultra	O
wide	O
(	O
90°	O
)	O
front-facing	O
camera	O
with	O
an	O
8-megapixel	O
sensor	O
,	O
unlike	O
the	O
Pixel	B-Device
3	I-Device
which	O
included	O
ultra	O
wide	O
(	O
97°	O
)	O
and	O
wide	O
(	O
75°	O
)	O
front-facing	O
cameras	O
,	O
both	O
of	O
which	O
also	O
had	O
8-megapixel	O
sensors	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
's	O
astrophotography	O
mode	O
is	O
able	O
to	O
stack	O
together	O
16	O
exposures	O
,	O
each	O
with	O
an	O
exposure	O
time	O
of	O
15	O
seconds	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
marks	O
the	O
introduction	O
of	O
Motion	O
Sense	O
,	O
a	O
radar-based	O
gesture	B-General_Concept
recognition	I-General_Concept
system	O
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
Project	O
Soli	O
technology	O
developed	O
by	O
Google	B-Application
ATAP	I-Application
as	O
an	O
alternative	O
to	O
light-based	O
systems	O
such	O
as	O
infrared	O
.	O
</s>
<s>
Motion	O
Sense	O
can	O
be	O
used	O
for	O
detecting	O
a	O
user	O
's	O
proximity	O
to	O
the	O
device	O
to	O
activate	O
the	O
always-on	O
display	O
or	O
power	O
the	O
screen	O
on	O
,	O
and	O
waving	O
gestures	O
that	O
can	O
be	O
used	O
in	O
supported	O
apps	O
(	O
such	O
as	O
skipping	O
tracks	O
in	O
the	O
music	O
player	O
,	O
and	O
an	O
interactive	O
Pokémon	B-Application
demo	O
app	O
)	O
.	O
</s>
<s>
Due	O
to	O
its	O
use	O
of	O
60GHz	O
frequency	O
bands	O
,	O
Google	B-Application
was	O
required	O
to	O
obtain	O
specific	O
regulatory	O
approval	O
for	O
the	O
radar	B-Application
system	I-Application
in	O
all	O
countries	O
that	O
the	O
Pixel	B-Device
4	I-Device
is	O
being	O
sold	O
.	O
</s>
<s>
On	O
launch	O
,	O
Google	B-Application
stated	O
that	O
support	O
for	O
the	O
feature	O
was	O
currently	O
limited	O
to	O
Australia	O
,	O
Canada	O
,	O
"	O
most	O
European	O
countries	O
"	O
,	O
Singapore	O
,	O
Taiwan	O
,	O
and	O
the	O
United	O
States	O
,	O
but	O
that	O
Japan	O
was	O
"	O
coming	O
soon	O
"	O
.	O
</s>
<s>
Google	B-Application
stated	O
that	O
it	O
had	O
no	O
plans	O
to	O
sell	O
the	O
Pixel	B-Device
4	I-Device
in	O
India	O
,	O
with	O
the	O
company	O
officially	O
stating	O
a	O
preference	O
to	O
continue	O
marketing	O
the	O
Pixel	B-Device
3a	I-Device
in	O
the	O
region	O
;	O
media	O
outlets	O
noted	O
that	O
civilian	O
use	O
of	O
the	O
60GHz	O
frequency	O
is	O
prohibited	O
in	O
India	O
,	O
unlike	O
in	O
the	O
U.S.	O
and	O
some	O
other	O
countries	O
,	O
where	O
it	O
is	O
considered	O
unlicensed	B-Algorithm
spectrum	I-Algorithm
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
ships	O
with	O
Android	B-Application
10	I-Application
and	O
Google	B-Application
Camera	I-Application
7.1	I-Application
.	O
</s>
<s>
The	O
devices	O
feature	O
several	O
features	O
powered	O
by	O
their	O
Pixel	B-Device
Neural	O
Core	O
(	O
the	O
successor	O
to	O
the	O
Pixel	B-Device
Visual	I-Device
Core	I-Device
)	O
and	O
Knowles	O
8508A	O
audio	O
processor	O
.	O
</s>
<s>
In	O
addition	O
to	O
its	O
existing	O
use	O
for	O
computational	B-Algorithm
photography	I-Algorithm
image	B-General_Concept
processing	I-General_Concept
,	O
they	O
are	O
used	O
by	O
the	O
new	O
Recorder	O
and	O
Live	O
Transcribe	O
apps	O
.	O
</s>
<s>
Also	O
the	O
"	O
new	O
"	O
Google	B-Application
Assistant	I-Application
,	O
which	O
contains	O
enhancements	O
to	O
allow	O
for	O
increased	O
client-side	O
recognition	O
of	O
commands	O
that	O
are	O
local	O
to	O
the	O
device	O
(	O
rather	O
than	O
querying	O
Google	B-Application
servers	O
)	O
.	O
</s>
<s>
After	O
Google	B-Application
demonstrated	O
astrophotography	O
sample	O
photos	O
,	O
a	O
scene	O
of	O
San	O
Francisco	O
with	O
the	O
moon	O
blown	O
out	O
and	O
the	O
woods	O
underexposed	O
was	O
shown	O
.	O
</s>
<s>
Marc	O
Levoy	O
explained	O
that	O
the	O
difference	O
in	O
light	O
between	O
the	O
moon	O
and	O
woods	O
was	O
too	O
significant	O
,	O
requiring	O
19	O
stops	O
of	O
dynamic	O
range	O
which	O
no	O
phone	O
or	O
DSLR	B-Device
camera	I-Device
was	O
currently	O
capable	O
of	O
performing	O
.	O
</s>
<s>
He	O
reaffirmed	O
Google	B-Application
's	I-Application
commitment	O
to	O
improving	O
the	O
camera	O
with	O
software	O
updates	O
(	O
a	O
signature	O
of	O
the	O
Pixel	B-Device
line	O
)	O
and	O
said	O
to	O
stay	O
tuned	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
received	O
an	O
overall	O
score	O
of	O
112	O
from	O
DXOMARK	B-Algorithm
,	O
a	O
10-point	O
improvement	O
over	O
its	O
predecessor	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
and	O
4	O
XL	O
were	O
praised	O
by	O
critics	O
for	O
their	O
photography	O
capabilities	O
,	O
the	O
move	O
to	O
6GB	O
of	O
RAM	O
from	O
4GB	O
,	O
and	O
the	O
90Hz	O
refresh	O
rate	O
screen	O
.	O
</s>
<s>
They	O
were	O
criticized	O
for	O
their	O
poor	O
battery	O
life	O
(	O
especially	O
on	O
the	O
smaller	O
Pixel	B-Device
4	I-Device
)	O
,	O
the	O
low	O
amount	O
of	O
non-expandable	O
storage	O
,	O
the	O
lack	O
of	O
an	O
ultra-wide	O
angle	O
camera	O
lens	O
,	O
the	O
removal	O
of	O
the	O
fingerprint	O
sensor	O
in	O
favor	O
of	O
the	O
secure	O
Face	O
Unlock	O
,	O
the	O
lack	O
of	O
4K	B-Architecture
60fps	O
video	O
recording	O
,	O
the	O
lack	O
of	O
headphones	O
or	O
an	O
adapter	O
in	O
the	O
box	O
,	O
the	O
Motion	O
Sense	O
system	O
's	O
poor	O
detection	O
,	O
and	O
the	O
high	O
price	O
compared	O
to	O
other	O
flagship	O
smartphones	B-Application
.	O
</s>
<s>
Google	B-Application
was	O
also	O
criticized	O
for	O
not	O
providing	O
unlimited	O
uncompressed	O
photo	O
and	O
video	O
cloud	O
storage	O
like	O
its	O
Pixel	B-Device
predecessors	O
had	O
.	O
</s>
<s>
Ars	O
Technica	O
gave	O
the	O
device	O
a	O
mixed	O
pre-release	O
review	O
,	O
noting	O
that	O
the	O
etched	O
finish	O
of	O
the	O
orange	O
and	O
white	O
models	O
felt	O
stronger	O
than	O
that	O
of	O
the	O
Pixel	B-Device
3	I-Device
without	O
compromising	O
its	O
"	O
soft	O
"	O
and	O
"	O
grippy	O
"	O
feel	O
,	O
but	O
that	O
the	O
screen	O
bezels	O
looked	O
"	O
lopsided	O
"	O
.	O
</s>
<s>
This	O
was	O
contrasted	O
with	O
early	O
demonstrations	O
of	O
the	O
technology	O
being	O
able	O
to	O
detect	O
"	O
sub-millimeter	O
motions	O
at	O
high	O
speed	O
and	O
accuracy	O
"	O
,	O
noting	O
that	O
Google	B-Application
's	I-Application
admitted	O
need	O
to	O
downsize	O
the	O
radar	B-Application
chip	O
in	O
order	O
to	O
fit	O
into	O
a	O
smartphone	B-Application
may	O
have	O
compromised	O
its	O
capabilities	O
.	O
</s>
<s>
Ars	O
Technica	O
's	O
in-depth	O
review	O
concluded	O
that	O
"	O
This	O
year	O
,	O
the	O
Pixel	B-Device
4	I-Device
feels	O
like	O
a	O
bunch	O
of	O
software	O
decisions	O
designed	O
to	O
prop	O
up	O
hardware	O
that	O
has	O
been	O
cost-cut	O
to	O
death	O
"	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
did	O
not	O
require	O
eye	O
contact	O
with	O
the	O
phone	O
when	O
using	O
facial	O
recognition	O
to	O
unlock	O
the	O
device	O
,	O
raising	O
privacy	O
concerns	O
since	O
the	O
device	O
could	O
be	O
unlocked	O
even	O
if	O
the	O
user	O
's	O
eyes	O
were	O
closed	O
.	O
</s>
<s>
Google	B-Application
released	O
an	O
update	O
in	O
April	O
2020	O
that	O
added	O
the	O
option	O
for	O
eyes	O
open	O
requirement	O
in	O
face	O
unlock	O
.	O
</s>
<s>
The	O
Pixel	B-Device
4	I-Device
automatically	O
lowers	O
the	O
display	O
's	O
refresh	O
rate	O
to	O
60Hz	O
if	O
the	O
screen	O
brightness	O
is	O
set	O
below	O
75	O
percent	O
.	O
</s>
<s>
Google	B-Application
released	O
a	O
fix	O
for	O
this	O
in	O
the	O
November	O
2019	O
update	O
.	O
</s>
<s>
In	O
certain	O
lighting	O
conditions	O
,	O
the	O
Pixel	B-Device
4	I-Device
's	O
white	O
balance	O
"	O
fix	O
"	O
could	O
result	O
in	O
photos	O
with	O
inaccurate	O
color	O
representation	O
.	O
</s>
<s>
Google	B-Application
released	O
a	O
fix	O
in	O
the	O
November	O
2019	O
update	O
.	O
</s>
