<s>
The	O
Surface	B-Application
Duo	I-Application
is	O
a	O
dual-touchscreen	B-Device
Android	B-Application
smartphone	B-Application
manufactured	O
by	O
Microsoft	O
.	O
</s>
<s>
Announced	O
during	O
a	O
hardware-oriented	O
event	O
on	O
October	O
2	O
,	O
2019	O
and	O
officially	O
released	O
on	O
September	O
10	O
,	O
2020	O
,	O
it	O
is	O
part	O
of	O
the	O
Microsoft	B-Device
Surface	I-Device
series	O
of	O
touchscreen	O
hardware	O
devices	O
,	O
and	O
the	O
first	O
device	O
in	O
the	O
line	O
that	O
does	O
not	O
run	O
Windows	B-Application
.	O
</s>
<s>
It	O
also	O
marks	O
Microsoft	O
's	O
first	O
smartphone	B-Application
since	O
the	O
dissolution	O
of	O
Microsoft	O
Mobile	O
and	O
the	O
Windows	B-Protocol
Phone	I-Protocol
platform	O
.	O
</s>
<s>
The	O
Surface	B-Application
Duo	I-Application
received	O
mixed	O
reviews	O
,	O
with	O
critics	O
praising	O
its	O
design	O
and	O
battery	O
life	O
,	O
but	O
mixed	O
on	O
its	O
multitasking	O
features	O
,	O
software	O
quality	O
,	O
and	O
believing	O
that	O
its	O
hardware	O
(	O
including	O
its	O
RAM	O
,	O
camera	O
,	O
and	O
wireless	O
network	O
support	O
)	O
was	O
outdated	O
and	O
underpowered	O
for	O
its	O
class	O
.	O
</s>
<s>
A	O
successor	O
,	O
the	O
Surface	B-Application
Duo	I-Application
2	O
,	O
was	O
unveiled	O
in	O
September	O
2021	O
.	O
</s>
<s>
The	O
Surface	B-Application
Duo	I-Application
is	O
a	O
folio-styled	O
device	O
,	O
with	O
two	O
5.6-inch	O
OLED	B-Device
displays	I-Device
with	O
a	O
4:3	O
aspect	O
ratio	O
.	O
</s>
<s>
The	O
360-degree	O
hinge	O
allows	O
the	O
device	O
to	O
be	O
used	O
in	O
several	O
"	O
postures	O
"	O
,	O
including	O
being	O
fully	O
unfolded	O
as	O
a	O
flat	O
surface	O
,	O
a	O
landscape	O
mode	O
where	O
the	O
virtual	B-Device
keyboard	I-Device
occupies	O
the	O
entirety	O
of	O
the	O
bottom	O
screen	O
,	O
and	O
the	O
other	O
screen	O
folded	O
backwards	O
for	O
single-screen	O
use	O
.	O
</s>
<s>
It	O
is	O
compatible	O
with	O
Surface	B-Device
Pen	I-Device
styluses	O
.	O
</s>
<s>
It	O
uses	O
a	O
Qualcomm	B-Architecture
Snapdragon	I-Architecture
855	O
system-on-chip	O
with	O
6GB	O
of	O
RAM	O
.	O
</s>
<s>
The	O
Surface	B-Application
Duo	I-Application
is	O
sold	O
in	O
models	O
with	O
128	O
and	O
256GB	O
of	O
non-expandable	O
internal	O
storage	O
.	O
</s>
<s>
The	O
Surface	B-Application
Duo	I-Application
includes	O
an	O
11-megapixel	O
camera	O
;	O
nominally	O
front-facing	O
,	O
it	O
can	O
be	O
used	O
like	O
a	O
rear-facing	O
camera	O
when	O
the	O
other	O
screen	O
is	O
folded	O
backwards	O
.	O
</s>
<s>
The	O
Surface	B-Application
Duo	I-Application
ships	O
with	O
Android	B-Application
10	I-Application
and	O
Google	B-Application
Mobile	I-Application
Services	I-Application
,	O
and	O
is	O
pre-loaded	O
with	O
both	O
Google	O
and	O
Microsoft-developed	O
apps	O
.	O
</s>
<s>
The	O
two	O
displays	O
are	O
designed	O
to	O
act	O
like	O
a	O
multi-monitor	B-General_Concept
configuration	O
on	O
a	O
PC	O
;	O
individual	O
apps	O
can	O
be	O
displayed	O
across	O
the	O
displays	O
,	O
an	O
app	O
on	O
one	O
display	O
can	O
open	O
external	O
links	O
on	O
the	O
other	O
,	O
and	O
supported	O
apps	O
can	O
display	O
different	O
views	O
on	O
each	O
display	O
.	O
</s>
<s>
Microsoft	O
stated	O
that	O
it	O
would	O
contribute	O
the	O
associated	O
APIs	B-General_Concept
for	O
these	O
features	O
to	O
the	O
upstream	O
Android	B-Application
Open	O
Source	O
Project	O
(	O
AOSP	O
)	O
,	O
so	O
that	O
this	O
functionality	O
could	O
be	O
leveraged	O
by	O
other	O
dual-screen	O
and	O
foldable	B-Application
smartphones	I-Application
.	O
</s>
<s>
Microsoft	O
committed	O
to	O
upgrading	O
the	O
Surface	B-Application
Duo	I-Application
to	O
Android	B-Application
11	I-Application
by	O
the	O
end	O
of	O
2021	O
.	O
</s>
<s>
Android	B-Application
12	O
L	O
was	O
released	O
in	O
October	O
2022	O
,	O
seven	O
months	O
after	O
its	O
release	O
.	O
</s>
<s>
Microsoft	O
stated	O
that	O
the	O
update	O
would	O
include	O
visual	O
elements	O
of	O
Windows	B-Application
11	I-Application
and	O
Fluent	B-Application
Design	I-Application
System	I-Application
.	O
</s>
<s>
The	O
Surface	B-Application
Duo	I-Application
can	O
unofficially	O
run	O
Windows	B-Application
10	O
and	O
Windows	B-Application
11	I-Application
with	O
WOA	O
Project	O
.	O
</s>
<s>
The	O
Verge	O
noted	O
that	O
the	O
Surface	B-Application
Duo	I-Application
was	O
thin	O
and	O
had	O
a	O
relatively	O
light	O
weight	O
for	O
its	O
class	O
,	O
and	O
observed	O
that	O
its	O
design	O
"	O
encourages	O
you	O
to	O
be	O
intentional	O
with	O
your	O
use	O
of	O
the	O
device	O
and	O
to	O
be	O
intentional	O
in	O
not	O
using	O
it.	O
"	O
</s>
<s>
It	O
was	O
felt	O
that	O
the	O
dual-screen	O
configuration	O
of	O
the	O
Surface	B-Application
Duo	I-Application
made	O
multitasking	O
more	O
natural	O
and	O
less	O
"	O
tacked	O
on[to]	O
 "	O
Android	B-Application
than	O
other	O
devices	O
,	O
and	O
that	O
apps	O
such	O
as	O
Amazon	B-General_Concept
Kindle	I-General_Concept
and	O
Microsoft	B-Application
Outlook	I-Application
were	O
well-optimized	O
to	O
the	O
dual-screen	O
setup	O
.	O
</s>
<s>
The	O
camera	O
was	O
criticized	O
for	O
its	O
placement	O
on	O
the	O
device	O
and	O
its	O
low	O
quality	O
(	O
being	O
described	O
as	O
akin	O
to	O
a	O
webcam	B-Protocol
and	O
poor	O
for	O
a	O
$300	O
phone	O
,	O
let	O
alone	O
one	O
that	O
cost	O
$	O
1,400	O
)	O
,	O
and	O
the	O
device	O
was	O
also	O
panned	O
for	O
being	O
underpowered	O
for	O
its	O
class	O
(	O
including	O
a	O
lack	O
of	O
support	O
for	O
5G	O
and	O
NFC	O
,	O
and	O
an	O
insufficient	O
amount	O
of	O
RAM	O
for	O
a	O
multitasking-oriented	O
device	O
)	O
,	O
although	O
noting	O
that	O
Microsoft	O
had	O
likely	O
used	O
the	O
time	O
since	O
the	O
2019	O
announcement	O
to	O
optimize	O
its	O
software	O
to	O
the	O
Snapdragon	B-Architecture
855	O
.	O
</s>
<s>
In	O
conclusion	O
,	O
it	O
was	O
felt	O
that	O
"	O
there	O
are	O
more	O
than	O
a	O
few	O
glimmers	O
of	O
vision	O
and	O
potential	O
in	O
the	O
Surface	B-Application
Duo	I-Application
"	O
,	O
but	O
that	O
"	O
the	O
execution	O
is	O
bad	O
in	O
places	O
,	O
and	O
a	O
lot	O
of	O
people	O
are	O
n’t	O
going	O
to	O
get	O
what	O
Microsoft	O
is	O
going	O
for.	O
"	O
</s>
<s>
Mary	O
Jo	O
Foley	O
of	O
ZDNet	O
described	O
the	O
Duo	O
's	O
hardware	O
as	O
"	O
premium	O
and	O
drool-worthy	O
"	O
,	O
and	O
found	O
it	O
to	O
be	O
the	O
first	O
Surface-branded	O
device	O
that	O
was	O
able	O
to	O
fulfill	O
Microsoft	O
's	O
promise	O
of	O
"	O
all-day	O
"	O
battery	O
life	O
,	O
but	O
felt	O
that	O
its	O
multitasking	O
systems	O
were	O
not	O
intuitive	O
(	O
drawing	O
comparisons	O
to	O
Windows	B-Application
8	I-Application
,	O
which	O
"assume[d]	O
users	O
can	O
easily	O
figure	O
out	O
how	O
to	O
do	O
basic	O
things	O
and	O
errs	O
on	O
the	O
side	O
of	O
providing	O
too	O
little	O
information	O
"	O
)	O
.	O
</s>
<s>
IFixit	O
gave	O
the	O
Surface	B-Application
Duo	I-Application
a	O
repairability	O
score	O
of	O
2/10	O
,	O
citing	O
that	O
although	O
its	O
displays	O
and	O
black	O
glass	O
"	O
can	O
be	O
replaced	O
without	O
disassembling	O
any	O
other	O
components	O
"	O
,	O
its	O
construction	O
contained	O
extensive	O
use	O
of	O
adhesive	O
,	O
and	O
that	O
its	O
USB	O
port	O
was	O
soldered	O
directly	O
to	O
its	O
mainboard	O
.	O
</s>
