<s>
The	O
Microsoft	B-Application
Lumia	I-Application
540	I-Application
is	O
a	O
low-cost	O
smartphone	B-Application
from	O
the	O
Microsoft	B-Device
Lumia	I-Device
family	O
.	O
</s>
<s>
Unlike	O
its	O
predecessor	O
,	O
the	O
Lumia	B-Application
540	I-Application
is	O
equipped	O
with	O
a	O
720p	O
display	O
,	O
but	O
otherwise	O
has	O
internal	O
specifications	O
similar	O
to	O
earlier	O
devices	O
in	O
the	O
Lumia	B-Device
5xx	O
series	O
.	O
</s>
<s>
It	O
comes	O
pre-installed	O
with	O
Windows	B-Protocol
Phone	I-Protocol
8.1	I-Protocol
Update	O
2	O
(	O
with	O
Lumia	B-Device
Denim	O
firmware	O
)	O
,	O
and	O
is	O
upgradable	O
to	O
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
.	O
</s>
<s>
Due	O
to	O
its	O
position	O
as	O
a	O
low-cost	O
device	O
,	O
the	O
Lumia	B-Application
540	I-Application
is	O
only	O
available	O
in	O
Italy	O
,	O
India	O
,	O
the	O
Middle	O
East	O
,	O
Africa	O
,	O
and	O
Asia	O
.	O
</s>
<s>
The	O
Lumia	B-Application
540	I-Application
has	O
a	O
5.0-inch	O
IPS	B-Architecture
LCD	I-Architecture
display	O
,	O
quad-core	O
1.2	O
GHz	O
Cortex-A7	O
Qualcomm	B-Architecture
Snapdragon	I-Architecture
200	O
processor	O
,	O
1GB	O
of	O
RAM	B-Architecture
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-Application
540	I-Application
ships	O
with	O
Windows	B-Protocol
Phone	I-Protocol
8.1	I-Protocol
with	O
Lumia	B-Device
Denim	O
update	O
.	O
</s>
<s>
The	O
Microsoft	B-Application
Lumia	I-Application
540	I-Application
Dual	I-Application
SIM	I-Application
was	O
well	O
received	O
but	O
was	O
criticized	O
for	O
not	O
offering	O
an	O
upgrade	O
over	O
earlier	O
devices	O
from	O
the	O
Lumia	B-Device
5xx	O
series	O
.	O
</s>
