<s>
The	O
Nokia	B-Device
Lumia	I-Device
2520	I-Device
is	O
a	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	B-Device
computer	I-Device
originally	O
developed	O
by	O
Nokia	O
.	O
</s>
<s>
It	O
is	O
Nokia	O
's	O
first	O
and	O
only	O
Windows-based	O
tablet	B-Device
,	O
and	O
the	O
company	O
's	O
first	O
tablet	B-Device
since	O
its	O
Nokia	B-Device
Internet	I-Device
Tablet	I-Device
line	O
.	O
</s>
<s>
Sharing	O
its	O
design	O
and	O
marketed	O
with	O
the	O
Nokia	B-Device
Lumia	I-Device
series	I-Device
of	O
Windows	B-Protocol
Phone	I-Protocol
products	O
,	O
the	O
device	O
incorporates	O
a	O
quad-core	O
Snapdragon	B-Architecture
800	O
chip	O
with	O
4G	O
LTE	O
support	O
,	O
along	O
with	O
a	O
10.1-inch	O
(	O
26cm	O
)	O
1080p	O
display	O
and	O
an	O
optional	O
"	O
Power	O
Keyboard	B-Device
"	O
dock	O
adding	O
additional	O
battery	O
capacity	O
,	O
USB	B-Protocol
ports	I-Protocol
,	O
and	O
a	O
physical	O
hardware	O
keyboard	B-Device
.	O
</s>
<s>
Following	O
a	O
period	O
of	O
speculation	O
and	O
leaks	O
,	O
the	O
Lumia	B-Device
2520	I-Device
was	O
officially	O
unveiled	O
on	O
22	O
October	O
2013	O
,	O
and	O
released	O
in	O
North	O
America	O
on	O
21	O
November	O
2013	O
.	O
</s>
<s>
The	O
2520	O
was	O
met	O
with	O
mostly	O
positive	O
reviews	O
,	O
praising	O
its	O
design	O
,	O
display	O
,	O
and	O
for	O
being	O
the	O
first	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	B-Device
to	O
offer	O
cellular	O
data	O
(	O
although	O
Microsoft	O
's	O
own	O
Surface	B-Device
2	I-Device
was	O
soon	O
available	O
with	O
such	O
an	O
option	O
)	O
.	O
</s>
<s>
However	O
,	O
the	O
device	O
also	O
received	O
criticism	O
for	O
the	O
lack	O
of	O
available	O
software	O
for	O
its	O
operating	B-General_Concept
system	I-General_Concept
(	O
due	O
to	O
the	O
inability	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
to	O
run	O
full	O
Windows	B-Application
desktop	O
programs	O
)	O
,	O
along	O
with	O
the	O
design	O
of	O
its	O
keyboard	B-Device
dock	O
.	O
</s>
<s>
The	O
Nokia	B-Device
Lumia	I-Device
2520	I-Device
was	O
discontinued	O
by	O
Microsoft	O
on	O
February	O
2	O
,	O
2015	O
,	O
being	O
the	O
last	O
Windows	B-Operating_System
RT	I-Operating_System
device	O
,	O
coming	O
a	O
month	O
after	O
the	O
production	O
halt	O
of	O
the	O
Surface	B-Device
2	I-Device
.	O
</s>
<s>
After	O
Nokia	O
's	O
phone	O
business	O
was	O
sold	O
to	O
Microsoft	O
,	O
Nokia	O
started	O
making	O
the	O
Nokia	B-Application
N1	I-Application
.	O
</s>
<s>
The	O
Nokia	B-Application
N1	I-Application
ultimately	O
succeeded	O
Nokia	O
's	O
former	O
Lumia	B-Device
2520	I-Device
.	O
</s>
<s>
In	O
September	O
2017	O
,	O
HMD	O
global	O
gained	O
rights	O
for	O
design	O
patent	O
of	O
Lumia	B-Device
2520	I-Device
.	O
</s>
<s>
In	O
mid-August	O
2013	O
,	O
details	O
began	O
leaking	O
surrounding	O
a	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	B-Device
being	O
produced	O
by	O
Nokia	O
codenamed	O
"	O
Sirius	O
"	O
,	O
which	O
featured	O
a	O
10.1-inch	O
(	O
26cm	O
)	O
screen	O
,	O
LTE	O
support	O
and	O
a	O
design	O
similar	O
to	O
Nokia	O
's	O
Lumia	B-Device
series	I-Device
of	O
Windows	B-Protocol
Phone	I-Protocol
devices	O
.	O
</s>
<s>
A	O
press	O
render	O
leaked	O
in	O
October	O
2013	O
,	O
along	O
with	O
its	O
branding	O
as	O
the	O
"	O
Lumia	B-Device
2520	I-Device
"	O
.	O
</s>
<s>
The	O
Lumia	B-Device
2520	I-Device
was	O
officially	O
unveiled	O
during	O
a	O
Nokia	O
press	O
event	O
on	O
22	O
October	O
2013	O
at	O
a	O
Nokia	O
World	O
event	O
in	O
Abu	O
Dhabi	O
,	O
where	O
it	O
also	O
unveiled	O
Lumia	B-Application
1320	I-Application
and	O
1520	B-Application
running	O
Windows	B-Protocol
Phone	I-Protocol
8	O
.	O
</s>
<s>
The	O
device	O
marks	O
Nokia	O
's	O
first	O
Microsoft	O
Windows-based	O
tablet	B-Device
device	I-Device
,	O
and	O
its	O
first	O
tablet	B-Device
product	O
since	O
its	O
Internet	B-Device
Tablet	I-Device
range	O
.	O
</s>
<s>
The	O
Lumia	B-Device
2520	I-Device
was	O
first	O
released	O
in	O
the	O
United	O
States	O
by	O
Verizon	B-Application
Wireless	I-Application
on	O
November	O
21	O
,	O
2013	O
.	O
</s>
<s>
In	O
the	O
U.S.	O
,	O
carrier-branded	O
versions	O
were	O
released	O
by	O
Verizon	B-Application
and	O
AT&T	O
.	O
</s>
<s>
The	O
Verizon	B-Application
Wireless	I-Application
model	O
differs	O
only	O
in	O
its	O
use	O
of	O
different	O
LTE	O
bands	O
,	O
and	O
a	O
lack	O
of	O
support	O
for	O
GSM	O
networks	O
,	O
unlike	O
the	O
international	O
and	O
AT&T	O
version	O
.	O
</s>
<s>
No	O
Wi-Fi-only	O
version	O
of	O
the	O
Lumia	B-Device
2520	I-Device
was	O
released	O
.	O
</s>
<s>
In	O
April	O
2014	O
,	O
Nokia	O
recalled	O
the	O
AC-300	O
travel	O
charger	O
for	O
the	O
Lumia	B-Device
2520	I-Device
after	O
it	O
was	O
discovered	O
that	O
the	O
cover	O
on	O
its	O
plug	O
could	O
separate	O
and	O
expose	O
internal	O
parts	O
,	O
posing	O
an	O
electric	O
shock	O
hazard	O
when	O
in	O
use	O
.	O
</s>
<s>
While	O
sold	O
as	O
an	O
accessory	O
in	O
the	O
United	O
States	O
,	O
it	O
was	O
bundled	O
with	O
European	O
models	O
;	O
as	O
a	O
result	O
,	O
Nokia	O
also	O
suspended	O
sales	O
of	O
the	O
Lumia	B-Device
2520	I-Device
in	O
Austria	O
,	O
Denmark	O
,	O
Finland	O
,	O
Germany	O
,	O
Russia	O
,	O
and	O
Switzerland	O
,	O
and	O
the	O
United	O
Kingdom	O
.	O
</s>
<s>
The	O
Lumia	B-Device
2520	I-Device
uses	O
a	O
quad-core	O
,	O
2.2GHz	O
Qualcomm	B-Architecture
Snapdragon	I-Architecture
800	I-Architecture
system-on-chip	B-Architecture
with	O
2GB	O
of	O
RAM	O
and	O
support	O
for	O
LTE	O
networks	O
,	O
and	O
has	O
either	O
32	O
or	O
64GB	O
of	O
internal	O
storage	O
which	O
can	O
be	O
expanded	O
up	O
to	O
64GB	O
with	O
a	O
MicroSD	O
card	O
.	O
</s>
<s>
Its	O
display	O
is	O
a	O
10.1-inch	O
(	O
26cm	O
)	O
,	O
1080p	O
IPS	B-Architecture
panel	I-Architecture
with	O
Nokia	O
's	O
"	O
ClearBlack	O
"	O
technology	O
,	O
coated	O
with	O
Corning	O
Gorilla	O
Glass	O
2	O
.	O
</s>
<s>
The	O
Lumia	B-Device
2520	I-Device
also	O
includes	O
an	O
8000	O
mAh	O
battery	O
rated	O
for	O
10	O
hours	O
of	O
use	O
,	O
a	O
6.7-megapixel	O
rear-facing	O
camera	O
identical	O
to	O
that	O
of	O
the	O
Lumia	B-Application
720	I-Application
,	O
micro	O
HDMI	B-Protocol
and	O
USB	B-Protocol
3.0	O
ports	O
,	O
and	O
a	O
proprietary	O
dock	O
connector	O
.	O
</s>
<s>
The	O
Lumia	B-Device
2520	I-Device
's	O
hardware	O
design	O
uses	O
a	O
similar	O
polycarbonate-based	O
style	O
to	O
Nokia	O
's	O
line	O
of	O
Lumia	B-Device
smartphones	B-Application
,	O
available	O
in	O
either	O
red	O
,	O
cyan	O
,	O
black	O
,	O
or	O
white	O
finishes	O
.	O
</s>
<s>
An	O
optional	O
keyboard	B-Device
dock	O
accessory	O
known	O
as	O
the	O
"	O
Power	O
Keyboard	B-Device
"	O
adds	O
a	O
keyboard	B-Device
,	O
kickstand	O
,	O
two	O
full-sized	O
USB	B-Protocol
ports	I-Protocol
and	O
a	O
supplemental	O
battery	O
,	O
rated	O
for	O
5	O
hours	O
of	O
additional	O
use	O
.	O
</s>
<s>
As	O
the	O
Lumia	B-Device
2520	I-Device
uses	O
the	O
ARM	B-Architecture
architecture	I-Architecture
rather	O
than	O
x86	B-Operating_System
,	O
it	O
runs	O
the	O
Windows	B-Operating_System
RT	I-Operating_System
8.1	B-Device
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
It	O
can	O
only	O
run	O
Windows	B-Application
Store	I-Application
apps	O
and	O
,	O
like	O
all	O
Windows	B-Operating_System
RT	I-Operating_System
products	O
,	O
is	O
pre-loaded	O
with	O
Microsoft	O
Office	O
RT	O
.	O
</s>
<s>
In	O
common	O
with	O
all	O
Lumia	B-Device
products	O
,	O
it	O
comes	O
with	O
a	O
suite	O
of	O
exclusive	O
Nokia-provided	O
apps	O
,	O
such	O
as	O
a	O
customized	O
Nokia	O
Camera	O
app	O
,	O
Here	B-Application
Maps	I-Application
,	O
MixRadio	B-Language
,	O
Storyteller	O
,	O
and	O
Video	O
Director	O
.	O
</s>
<s>
A	O
unique	O
augmented	B-General_Concept
reality	I-General_Concept
game	O
,	O
DreamWorks	O
Dragons	B-Application
Adventure	I-Application
,	O
is	O
also	O
included	O
.	O
</s>
<s>
The	O
Lumia	B-Device
2520	I-Device
was	O
released	O
to	O
positive	O
reviews	O
;	O
early	O
reviews	O
praised	O
the	O
tablet	B-Device
for	O
its	O
display	O
and	O
design	O
,	O
and	O
praised	O
its	O
performance	O
for	O
showing	O
a	O
notable	O
improvement	O
over	O
early	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
such	O
as	O
the	O
first-generation	B-Device
Surface	I-Device
.	O
</s>
<s>
Engadget	B-Application
gave	O
the	O
Lumia	B-Device
2520	I-Device
a	O
79	O
out	O
of	O
100	O
,	O
considering	O
it	O
to	O
be	O
a	O
"	O
strong	O
"	O
entry	O
into	O
the	O
Windows	B-Application
tablet	B-Device
market	O
,	O
but	O
criticizing	O
the	O
limitations	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
and	O
the	O
poor	O
Windows	B-Application
Store	I-Application
app	O
selection	O
,	O
the	O
fact	O
that	O
there	O
was	O
no	O
Wi-Fi-only	O
model	O
,	O
the	O
keyboard	B-Device
dock	O
's	O
key	O
layout	O
being	O
too	O
"	O
cramped	O
"	O
,	O
and	O
the	O
dock	O
's	O
kickstand	O
was	O
criticized	O
for	O
echoing	O
the	O
design	O
of	O
the	O
original	O
Microsoft	B-Device
Surface	I-Device
,	O
which	O
was	O
poor	O
for	O
"	O
in-lap	O
"	O
use	O
because	O
it	O
only	O
had	O
one	O
angle	O
.	O
</s>
<s>
However	O
,	O
the	O
Lumia	B-Device
2520	I-Device
was	O
praised	O
for	O
having	O
a	O
light	O
build	O
,	O
and	O
a	O
relatively	O
better	O
camera	O
than	O
other	O
tablets	B-Device
(	O
but	O
criticizing	O
the	O
quality	O
of	O
its	O
video	O
recording	O
,	O
describing	O
it	O
as	O
an	O
afterthought	O
)	O
.	O
</s>
<s>
The	O
Verge	O
believed	O
that	O
the	O
Lumia	B-Device
2520	I-Device
had	O
better	O
performance	O
than	O
the	O
Microsoft	B-Device
Surface	I-Device
2	I-Device
,	O
and	O
was	O
more	O
"	O
portable	O
"	O
due	O
to	O
its	O
LTE	O
support	O
,	O
but	O
criticized	O
the	O
keyboard	B-Device
dock	O
for	O
being	O
too	O
heavy	O
,	O
and	O
shared	O
concerns	O
surrounding	O
the	O
application	O
selection	O
for	O
Windows	B-Application
Store	I-Application
.	O
</s>
