<s>
The	O
Sony	B-Application
Xperia	I-Application
M4	I-Application
Aqua	I-Application
is	O
a	O
mid-range	O
Android	B-Application
smartphone	B-Application
developed	O
and	O
manufactured	O
by	O
Sony	O
.	O
</s>
<s>
The	O
phone	O
was	O
unveiled	O
along	O
with	O
Xperia	B-Application
Z4	I-Application
Tablet	I-Application
in	O
the	O
press	O
conference	O
held	O
by	O
Sony	O
during	O
the	O
2015	O
Mobile	O
World	O
Congress	O
in	O
Barcelona	O
,	O
Spain	O
,	O
on	O
March	O
2	O
.	O
</s>
<s>
Five	O
months	O
later	O
,	O
a	O
successor	O
Xperia	B-Application
M5	I-Application
was	O
announced	O
.	O
</s>
<s>
It	O
is	O
Sony	O
's	O
first	O
smartphone	B-Application
to	O
feature	O
an	O
octa-core	O
processor	O
and	O
also	O
Sony	O
's	O
first	O
water-resistant	O
smartphone	B-Application
to	O
feature	O
an	O
exposed	O
micro	O
USB	B-Protocol
port	I-Protocol
(	O
cap-less	O
microUSB	O
charging	O
)	O
.	O
</s>
<s>
Similar	O
to	O
the	O
Xperia	B-Application
Z3	I-Application
,	O
the	O
design	O
consists	O
of	O
a	O
plastic	O
frame	O
instead	O
of	O
metal	O
with	O
a	O
plastic	O
backing	O
.	O
</s>
<s>
Also	O
,	O
the	O
micro-USB	O
port	O
of	O
the	O
device	O
is	O
uncovered	O
unlike	O
other	O
Xperia	B-Device
devices	O
.	O
</s>
<s>
The	O
device	O
features	O
a	O
720p	O
display	O
with	O
a	O
density	B-Algorithm
of	O
294	O
ppi	O
.	O
</s>
<s>
The	O
device	O
features	O
a	O
Snapdragon	O
615	O
(	O
MSM8939	O
)	O
octa-core	O
processor	O
clocked	O
at	O
1.5GHz	O
along	O
with	O
2GB	O
RAM	B-Architecture
.	O
</s>
<s>
The	O
Xperia	B-Device
M4	O
Aqua	O
's	O
rear-facing	O
camera	O
is	O
13	O
megapixels	O
with	O
a	O
Sony	O
Exmor	O
RS	O
image	B-Algorithm
sensor	I-Algorithm
and	O
the	O
front	O
facing	O
camera	O
is	O
5	O
megapixels	O
.	O
</s>
<s>
The	O
Xperia	B-Device
M4	O
Aqua	O
is	O
Sony	O
’s	O
first	O
device	O
to	O
come	O
preinstalled	O
with	O
Android	B-Application
5.0	I-Application
Lollipop	I-Application
.	O
</s>
<s>
The	O
device	O
was	O
updated	O
to	O
Android	B-Application
6.0	I-Application
Marshmallow	I-Application
in	O
July	O
2016	O
.	O
</s>
<s>
Tom	O
's	O
Hardware	O
listed	O
the	O
Xperia	B-Device
M4	O
Aqua	O
as	O
the	O
best	O
value	O
phone	O
in	O
their	O
best	O
of	O
Mobile	O
World	O
Congress	O
2015	O
list	O
.	O
</s>
