<s>
The	O
Nokia	B-Application
Lumia	I-Application
1520	I-Application
was	O
a	O
flagship	O
Windows	B-Protocol
Phone	I-Protocol
phablet	B-Application
smartphone	B-Application
designed	O
and	O
produced	O
by	O
Finnish	O
telecommunications	O
manufacturer	O
Nokia	O
in	O
partnership	O
with	O
American	O
software	O
manufacturer	O
Microsoft	O
.	O
</s>
<s>
The	O
device	O
was	O
first	O
announced	O
at	O
the	O
Nokia	O
World	O
event	O
on	O
22	O
October	O
2013	O
in	O
Abu	O
Dhabi	O
,	O
alongside	O
its	O
mid-range	O
phablet	B-Application
stablemate	O
the	O
Nokia	B-Application
Lumia	I-Application
1320	I-Application
and	O
Nokia	O
's	O
10.1	O
inch	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	B-Device
the	O
Nokia	B-Device
Lumia	I-Device
2520	I-Device
.	O
</s>
<s>
Until	O
its	O
discontinuation	O
in	O
the	O
United	O
States	O
on	O
7	O
April	O
2015	O
the	O
phone	O
served	O
as	O
the	O
flagship	O
device	O
for	O
Nokia	O
's	O
Lumia	B-Device
Series	I-Device
and	O
Microsoft	O
's	O
mobile	O
effort	O
.	O
</s>
<s>
On	O
6	O
October	O
2015	O
Microsoft	O
officially	O
announced	O
its	O
flagship	O
phablet	B-Application
successor	O
,	O
the	O
Microsoft	B-Device
Lumia	I-Device
950	I-Device
XL	I-Device
,	O
with	O
availability	O
sometime	O
in	O
November	O
2015	O
.	O
</s>
<s>
The	O
device	O
was	O
powered	O
by	O
a	O
2.2GHz	O
quad-core	O
MSM8974	O
Snapdragon	B-Architecture
800	I-Architecture
system-on-chip	B-Architecture
with	O
an	O
ARM-based	B-Architecture
Krait	B-Application
400	I-Application
CPU	O
produced	O
by	O
American	O
semiconductor	O
manufacturer	O
Qualcomm	O
.	O
</s>
<s>
It	O
was	O
paired	O
with	O
2GB	O
of	O
RAM	B-Architecture
and	O
an	O
AMD	O
Adreno	B-General_Concept
330	I-General_Concept
GPU	O
.	O
</s>
<s>
The	O
screen	O
of	O
the	O
1520	O
was	O
an	O
optically-bonded	O
Full	O
HD	O
(	O
1080p	O
)	O
IPS	B-Architecture
display	I-Architecture
with	O
16	O
million	O
colors	O
featuring	O
Nokia	O
's	O
proprietary	O
ClearBlack''	O
display	O
technology	O
.	O
</s>
<s>
It	O
measured	O
diagonal	O
with	O
a	O
16:9	O
aspect	O
ratio	O
,	O
resulting	O
in	O
a	O
pixel	B-Algorithm
density	I-Algorithm
of	O
367	O
ppi	O
.	O
</s>
<s>
The	O
device	O
shipped	O
with	O
Windows	B-Protocol
Phone	I-Protocol
8	O
preinstalled	O
and	O
was	O
upgradable	O
to	O
Windows	B-Protocol
Phone	I-Protocol
8.1	I-Protocol
Now	O
this	O
device	O
is	O
included	O
on	O
the	O
Microsoft	O
list	O
of	O
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
upgrade	O
,	O
it	O
can	O
be	O
upgraded	O
through	O
the	O
Windows	B-Application
Insider	I-Application
program	I-Application
too	O
.	O
</s>
<s>
The	O
phone	O
had	O
a	O
large	O
non-removable	O
3400	O
mAh	O
Li-Ion	O
battery	O
(	O
BV-4BW	O
)	O
,	O
which	O
gave	O
it	O
slightly	O
longer	O
endurance	O
compared	O
to	O
its	O
contemporaries	O
from	O
Android	B-Application
and	O
iOS	B-Application
.	O
</s>
<s>
Owing	O
to	O
its	O
large	O
dimensions	O
and	O
flagship	O
specifications	O
,	O
the	O
phone	O
was	O
viewed	O
as	O
a	O
direct	O
competitor	O
to	O
the	O
Samsung	B-Application
Galaxy	I-Application
Note	I-Application
3	I-Application
and	O
HTC	B-Application
One	I-Application
Max	I-Application
.	O
</s>
<s>
The	O
Lumia	B-Application
1520	I-Application
was	O
initially	O
released	O
in	O
Singapore	O
,	O
Hong	O
Kong	O
,	O
the	O
United	O
States	O
,	O
France	O
,	O
China	O
,	O
Germany	O
,	O
Finland	O
,	O
Pakistan	O
and	O
India	O
.	O
</s>
<s>
In	O
Australia	O
,	O
the	O
Lumia	B-Application
1520	I-Application
was	O
distributed	O
exclusively	O
through	O
launch	O
partner	O
Harvey	O
Norman	O
.	O
</s>
<s>
Production	O
of	O
the	O
Lumia	B-Application
1520	I-Application
has	O
been	O
officially	O
discontinued	O
.	O
</s>
<s>
The	O
Lumia	B-Application
1520	I-Application
's	O
IPS	B-Architecture
LCD	I-Architecture
display	O
is	O
the	O
first	O
Windows	B-Protocol
Phone	I-Protocol
display	O
to	O
have	O
a	O
resolution	O
of	O
1080p	O
,	O
allowing	O
it	O
to	O
have	O
three	O
columns	O
of	O
Live	O
Tiles	O
and	O
is	O
covered	O
with	O
by	O
Gorilla	O
Glass	O
2	O
.	O
</s>
<s>
At	O
6	O
inch	O
,	O
the	O
display	O
has	O
a	O
pixel	B-Algorithm
density	I-Algorithm
of	O
368	O
pixels	B-Algorithm
per	I-Algorithm
inch	I-Algorithm
.	O
</s>
<s>
The	O
phone	O
has	O
a	O
2.2GHz	O
Snapdragon	B-Architecture
800	I-Architecture
SoC	B-Architecture
,	O
and	O
a	O
20	O
megapixel	O
PureView	O
camera	O
.	O
</s>
<s>
The	O
Lumia	B-Application
1520	I-Application
has	O
a	O
3,400	O
mAh	O
battery	O
and	O
will	O
be	O
compatible	O
with	O
a	O
US$99	O
DC-50	O
wireless-charging	O
plate	O
,	O
with	O
the	O
phone	O
itself	O
to	O
have	O
a	O
price	O
of	O
US$749	O
.	O
</s>
<s>
Like	O
the	O
Lumia	B-Device
1020	I-Device
it	O
takes	O
a	O
shareable	O
5Mpx	O
picture	O
and	O
a	O
16Mpx	O
picture	O
that	O
can	O
only	O
be	O
accessed	O
by	O
attaching	O
the	O
handset	O
into	O
a	O
PC	O
,	O
but	O
only	O
has	O
1/2.5	O
"	O
sensor	O
size	O
.	O
</s>
<s>
Capable	O
of	O
2x	O
data	B-General_Concept
binning	I-General_Concept
lossless	O
compression	O
for	O
taking	O
photos	O
and	O
4x	O
for	O
taking	O
videos	O
.	O
</s>
<s>
Andy	O
Vandervell	O
from	O
TrustedReviews	O
wrote	O
:	O
"	O
The	O
Lumia	B-Application
1520	I-Application
is	O
a	O
watershed	O
phone	O
in	O
many	O
respects	O
.	O
</s>
<s>
It	O
brings	O
Windows	B-Protocol
Phone	I-Protocol
hardware	O
on	O
par	O
with	O
the	O
rest	O
of	O
the	O
smartphone	B-Application
world	O
,	O
but	O
the	O
software	O
still	O
needs	O
a	O
bit	O
of	O
work.	O
"	O
</s>
<s>
Brad	O
Molen	O
from	O
Engadget	O
concludes	O
:	O
"	O
The	O
Lumia	B-Application
1520	I-Application
offers	O
a	O
Windows	B-Protocol
Phone	I-Protocol
experience	O
unlike	O
any	O
we	O
've	O
seen	O
before	O
.	O
</s>
<s>
The	O
Nokia	B-Application
Lumia	I-Application
1520	I-Application
won	O
the	O
GSM	O
Arena	O
's	O
Smartphone	B-Application
Champions	O
League	O
in	O
2013	O
.	O
</s>
<s>
Nokia	O
captured	O
the	O
first	O
3	O
places	O
with	O
the	O
Nokia	B-Device
Lumia	I-Device
1020	I-Device
in	O
second	O
place	O
and	O
the	O
Nokia	B-Device
Lumia	I-Device
520	O
tied	O
for	O
third	O
with	O
the	O
LG	O
Nexus	O
5	O
.	O
</s>
<s>
For	O
example	O
,	O
early	O
users	O
reported	O
a	O
speaker	O
overdrive	O
issue	O
with	O
Windows	B-Protocol
Phone	I-Protocol
8.1	I-Protocol
version	O
5001	O
.	O
</s>
