<s>
Microsoft	B-Device
Lumia	I-Device
550	I-Device
is	O
a	O
budget	O
smartphone	B-Application
manufactured	O
by	O
Microsoft	O
Mobile	O
as	O
part	O
of	O
its	O
Lumia	B-Device
family	O
of	O
Windows-based	O
mobile	O
computing	O
products	O
.	O
</s>
<s>
It	O
was	O
introduced	O
along	O
with	O
the	O
Lumia	B-Application
950	I-Application
and	O
the	O
Lumia	B-Device
950	I-Device
XL	I-Device
on	O
6	O
October	O
2015	O
at	O
a	O
press	O
event	O
held	O
in	O
New	O
York	O
City	O
.	O
</s>
<s>
The	O
Lumia	B-Device
550	I-Device
was	O
released	O
in	O
December	O
2015	O
with	O
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
version	O
1511	O
.	O
</s>
<s>
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
version	O
1607	O
,	O
Anniversary	O
Update	O
was	O
released	O
in	O
August	O
2016	O
.	O
</s>
<s>
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
version	O
1709	O
,	O
Fall	O
Creators	O
Update	O
,	O
was	O
the	O
final	O
software	O
update	O
.	O
</s>
<s>
The	O
Lumia	B-Device
550	I-Device
has	O
a	O
4.7-inch	O
IPS	O
LCD	O
display	O
,	O
quad-core	O
1.1GHz	O
Cortex-A7	B-Application
Qualcomm	O
Snapdragon	O
210	O
processor	O
,	O
1GB	O
of	O
RAM	O
and	O
8GB	O
of	O
internal	O
storage	O
that	O
can	O
be	O
expanded	O
using	O
microSD	O
cards	O
up	O
to	O
256GB	O
.	O
</s>
<s>
The	O
Lumia	B-Device
550	I-Device
ships	O
with	O
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
.	O
</s>
<s>
Michael	O
Allison	O
of	O
MSPoweruser	O
criticized	O
the	O
Lumia	B-Device
550	I-Device
for	O
having	O
lower	O
specs	O
than	O
its	O
predecessor	O
,	O
such	O
as	O
an	O
inferior	O
5MP	O
camera	O
that	O
lacks	O
a	O
wide	O
angle	O
lens	O
,	O
missing	O
functionality	O
and	O
a	O
shorter	O
battery	O
life	O
,	O
making	O
it	O
uncompetitive	O
with	O
similar	O
phones	O
in	O
its	O
price	O
range	O
.	O
</s>
<s>
Sean	O
Cameron	O
of	O
Techradar	O
gave	O
the	O
Lumia	B-Device
550	I-Device
3	O
stars	O
out	O
of	O
5	O
,	O
praising	O
its	O
screen	O
,	O
camera	O
and	O
speakers	O
,	O
but	O
criticizing	O
the	O
battery	O
life	O
and	O
performance	O
and	O
calling	O
the	O
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
operating	O
system	O
"	O
unfinished	O
"	O
.	O
</s>
