<s>
The	O
Samsung	B-Application
Galaxy	I-Application
S4	I-Application
is	O
an	O
Android	B-Application
smartphone	B-Application
produced	O
by	O
Samsung	B-Application
Electronics	O
as	O
the	O
fourth	O
smartphone	B-Application
of	O
the	O
Samsung	B-Application
Galaxy	I-Application
S	I-Application
series	I-Application
and	O
was	O
first	O
shown	O
publicly	O
on	O
March	O
14	O
,	O
2013	O
,	O
at	O
Samsung	B-Application
Mobile	O
Unpacked	O
in	O
New	O
York	O
City	O
.	O
</s>
<s>
It	O
is	O
the	O
successor	O
to	O
the	O
Galaxy	B-Application
S	I-Application
III	I-Application
,	O
which	O
maintains	O
a	O
similar	O
design	O
,	O
but	O
with	O
upgraded	O
hardware	O
,	O
more	O
sensors	O
,	O
and	O
an	O
increased	O
focus	O
on	O
software	O
features	O
that	O
take	O
advantage	O
of	O
its	O
hardware	O
capabilities	O
—	O
such	O
as	O
the	O
ability	O
to	O
detect	O
when	O
a	O
finger	O
is	O
hovered	O
over	O
the	O
screen	O
,	O
and	O
expanded	O
eye	B-General_Concept
tracking	I-General_Concept
functionality	O
,	O
it	O
was	O
released	O
the	O
previous	O
year	O
.	O
</s>
<s>
A	O
hardware	O
variant	O
of	O
the	O
S4	B-Application
became	O
the	O
first	O
smartphone	B-Application
to	O
support	O
the	O
emerging	O
LTE	O
Advanced	O
mobile	O
network	O
standard	O
(	O
model	O
number	O
GT-i9506	B-Application
)	O
.	O
</s>
<s>
The	O
T-Mobile	O
version	O
of	O
the	O
Galaxy	B-Application
S4	I-Application
,	O
named	O
the	O
model	O
(	O
SGH-M919	B-Application
)	O
,	O
was	O
released	O
the	O
same	O
month	O
.	O
</s>
<s>
The	O
phone	O
's	O
successor	O
,	O
the	O
Samsung	B-Application
Galaxy	I-Application
S5	I-Application
,	O
was	O
released	O
the	O
next	O
year	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S4	I-Application
is	O
among	O
the	O
earliest	O
phones	O
to	O
feature	O
a	O
1080p	O
Full	O
HD	O
display	O
,	O
1080p	O
front	O
camera	O
video	O
recording	O
,	O
and	O
among	O
few	O
to	O
feature	O
temperature	O
and	O
humidity	O
sensors	O
and	O
a	O
touch	B-Device
screen	I-Device
able	O
to	O
detect	O
a	O
floating	O
finger	O
.	O
</s>
<s>
The	O
S4	B-Application
was	O
made	O
available	O
in	O
late	O
April	O
2013	O
on	O
327	O
carriers	O
in	O
155	O
countries	O
.	O
</s>
<s>
It	O
became	O
Samsung	B-Application
's	O
fastest	O
selling	O
smartphone	B-Application
and	O
eventually	O
Samsung	B-Application
's	O
best-selling	O
smartphone	B-Application
with	O
20	O
million	O
sold	O
worldwide	O
in	O
the	O
first	O
two	O
months	O
,	O
and	O
40	O
million	O
in	O
the	O
first	O
six	O
months	O
.	O
</s>
<s>
In	O
total	O
,	O
more	O
than	O
80	O
million	O
Galaxy	B-Application
S4	I-Application
units	O
have	O
been	O
sold	O
,	O
making	O
it	O
the	O
most	O
selling	O
Android-powered	O
mobile	O
phone	O
of	O
all	O
time	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S4	I-Application
's	O
successor	O
,	O
the	O
Samsung	B-Application
Galaxy	I-Application
S5	I-Application
,	O
was	O
announced	O
by	O
Samsung	B-Application
in	O
February	O
2014	O
ahead	O
of	O
a	O
release	O
in	O
April	O
of	O
that	O
year	O
.	O
</s>
<s>
The	O
Samsung	B-Application
Galaxy	I-Application
S4	I-Application
uses	O
a	O
refined	O
version	O
of	O
the	O
hardware	O
design	O
introduced	O
by	O
the	O
Samsung	B-Application
Galaxy	I-Application
S	I-Application
III	I-Application
,	O
with	O
a	O
rounded	O
,	O
polycarbonate	O
chassis	O
and	O
a	O
removable	O
rear	O
cover	O
.	O
</s>
<s>
It	O
is	O
slightly	O
lighter	O
and	O
narrower	O
than	O
the	O
Samsung	B-Application
Galaxy	I-Application
S	I-Application
III	I-Application
,	O
with	O
a	O
length	O
of	O
,	O
a	O
width	O
of	O
,	O
and	O
a	O
thickness	O
of	O
.	O
</s>
<s>
At	O
the	O
bottom	O
of	O
the	O
device	O
is	O
a	O
microphone	O
and	O
a	O
micro	O
USB	B-Protocol
port	I-Protocol
for	O
data	O
connections	O
and	O
charging	O
;	O
it	O
also	O
supports	O
USB-OTG	O
and	O
MHL	B-Protocol
2.0	O
.	O
</s>
<s>
Near	O
the	O
top	O
of	O
the	O
device	O
are	O
a	O
front-facing	O
camera	O
,	O
an	O
infrared	O
transmitter	O
for	O
usage	O
as	O
universal	O
remote	B-Protocol
control	I-Protocol
,	O
proximity	B-Device
,	O
and	O
ambient	O
light	O
sensors	O
,	O
and	O
a	O
notification	B-Application
LED	I-Application
.	O
</s>
<s>
A	O
headphone	B-Device
jack	I-Device
,	O
secondary	O
microphone	O
and	O
infrared	O
blaster	O
are	O
located	O
at	O
the	O
top	O
.	O
</s>
<s>
The	O
S4	B-Application
is	O
widely	O
available	O
in	O
black	O
and	O
white	O
color	O
finishes	O
;	O
in	O
selected	O
regions	O
,	O
Samsung	B-Application
also	O
introduced	O
versions	O
in	O
red	O
,	O
purple	O
,	O
pink	O
,	O
brown	O
with	O
gold	O
trim	O
,	O
and	O
light	O
pink	O
with	O
gold	O
trim	O
.	O
</s>
<s>
In	O
late	O
January	O
2014	O
,	O
Samsung	B-Application
's	O
Russian	O
website	O
briefly	O
listed	O
a	O
new	O
black	O
model	O
with	O
a	O
plastic	O
leather	O
backing	O
,	O
similar	O
to	O
the	O
Galaxy	B-Application
Note	I-Application
3	I-Application
.	O
</s>
<s>
The	O
S4	B-Application
's	O
Super	O
AMOLED	O
display	O
with	O
1080×1920	O
pixels	B-Algorithm
(	O
1080p	O
Full	O
HD	O
)	O
is	O
larger	O
than	O
the	O
720×1280	O
display	O
of	O
its	O
predecessor	B-Application
,	O
and	O
also	O
features	O
a	O
brand	O
new	O
"	O
Diamond	O
"	O
PenTile	O
RGBG	O
matrix	O
subpixel	O
arrangement	O
which	O
has	O
a	O
better	O
subpixel	O
fill-rate	O
for	O
any	O
given	O
resolution	O
than	O
the	O
traditional	O
linear	O
RGBG	O
PenTile	O
layout	O
that	O
had	O
been	O
used	O
prior	O
(	O
aka	O
,	O
there	O
's	O
less	O
empty	O
black	O
space	O
between	O
each	O
subpixel	O
)	O
.	O
</s>
<s>
The	O
whole	O
pixel	B-Algorithm
density	I-Algorithm
also	O
increased	O
from	O
306	O
to	O
441ppi	O
,	O
surfaced	O
with	O
Corning	O
Gorilla	O
Glass	O
3	O
.	O
</s>
<s>
An	O
added	O
glove	B-General_Concept
mode	O
option	O
increases	O
touch	O
sensitivity	O
to	O
allow	O
detecting	O
touch	O
input	O
through	O
gloves	B-General_Concept
.	O
</s>
<s>
The	O
Galaxy	B-Application
S4	I-Application
is	O
Samsung	B-Application
's	O
first	O
and	O
one	O
of	O
the	O
earliest	O
mobile	O
phones	O
of	O
all	O
time	O
to	O
feature	O
a	O
1080p	O
display	O
.	O
</s>
<s>
Unlike	O
previous	O
models	O
,	O
the	O
S4	B-Application
does	O
not	O
contain	O
FM	O
radio	O
support	O
,	O
citing	O
the	O
increased	O
use	O
of	O
online	O
media	O
outlets	O
for	O
content	O
consumption	O
on	O
mobile	O
devices	O
.	O
</s>
<s>
The	O
camera	O
of	O
the	O
Galaxy	B-Application
S4	I-Application
uses	O
a	O
13-megapixel	O
Sony	O
Exmor	O
RS	O
IMX135	O
image	O
sensor	O
(	O
4128×3096	O
)	O
,	O
later	O
used	O
on	O
the	O
Galaxy	B-Application
Note	I-Application
3	I-Application
.	O
</s>
<s>
While	O
the	O
front	O
cameras	O
of	O
the	O
Galaxy	B-Application
S3	I-Application
and	O
Galaxy	B-Operating_System
Note	I-Operating_System
2	I-Operating_System
,	O
both	O
released	O
in	O
2012	O
,	O
are	O
only	O
able	O
to	O
capture	O
videos	O
at	O
up	O
to	O
720p	O
HD	O
resolution	O
,	O
the	O
front	O
camera	O
of	O
the	O
Galaxy	B-Application
S4	I-Application
allows	O
1080p	O
Full	O
HD	O
video	O
recording	O
for	O
the	O
first	O
time	O
in	O
any	O
Samsung	B-Application
mobile	O
phone	O
.	O
</s>
<s>
Like	O
the	O
Galaxy	B-Application
S3	I-Application
,	O
the	O
S4	B-Application
is	O
equipped	O
with	O
an	O
accelerometer	O
sensor	O
,	O
a	O
gyroscope	B-Application
,	O
a	O
front-facing	O
proximity	B-Device
sensor	I-Device
,	O
digital	O
compass	O
and	O
barometer	O
.	O
</s>
<s>
Unlike	O
the	O
predecessor	B-Application
,	O
the	O
S4	B-Application
is	O
also	O
equipped	O
with	O
a	O
hall	B-Algorithm
sensor	I-Algorithm
for	O
the	O
S	O
View	O
cover	O
,	O
a	O
self-capacitive	O
touch	B-Device
screen	I-Device
layer	O
for	O
Air	O
View	O
and	O
thermometer	O
and	O
hygrometer	O
sensors	O
,	O
the	O
last	O
two	O
of	O
which	O
only	O
the	O
Galaxy	B-Application
S4	I-Application
and	O
Galaxy	B-Application
Note	I-Application
3	I-Application
out	O
of	O
all	O
historical	O
Samsung	B-Application
flagship	O
devices	O
are	O
equipped	O
with	O
.	O
</s>
<s>
Galaxy	B-Application
S4	I-Application
models	O
use	O
one	O
of	O
two	O
processors	O
,	O
depending	O
on	O
the	O
region	O
and	O
network	O
compatibility	O
.	O
</s>
<s>
The	O
S4	B-Application
version	O
for	O
North	O
America	O
,	O
most	O
of	O
Europe	O
,	O
parts	O
of	O
Asia	O
,	O
and	O
other	O
countries	O
contains	O
Qualcomm	O
's	O
Snapdragon	O
600	O
system-on-chip	B-Architecture
,	O
containing	O
a	O
quad-core	B-Architecture
1.9GHz	O
Krait	B-Application
300	I-Application
CPU	B-Device
and	O
an	O
Adreno	B-General_Concept
320	O
GPU	B-Architecture
.	O
</s>
<s>
Other	O
models	O
include	O
Samsung	B-Application
's	O
Exynos	O
5	O
Octa	O
system-on-chip	B-Architecture
with	O
a	O
heterogeneous	O
CPU	B-Device
.	O
</s>
<s>
The	O
octa-core	B-Architecture
CPU	B-Device
comprises	O
a	O
1.6GHz	O
quad-core	B-Architecture
Cortex-A15	O
cluster	O
and	O
a	O
1.2GHz	O
quad-core	B-Architecture
Cortex-A7	B-Application
cluster	O
.	O
</s>
<s>
The	O
chip	O
can	O
dynamically	O
switch	O
between	O
the	O
two	O
clusters	O
of	O
cores	O
based	O
on	O
CPU	B-Device
usage	O
;	O
the	O
chip	O
switches	O
to	O
the	O
A15	O
cores	O
when	O
more	O
processing	O
power	O
is	O
needed	O
,	O
and	O
stays	O
on	O
the	O
A7	O
cores	O
to	O
conserve	O
energy	O
on	O
lighter	O
loads	O
.	O
</s>
<s>
Only	O
one	O
of	O
the	O
clusters	O
is	O
used	O
at	O
any	O
particular	O
moment	O
,	O
and	O
software	O
sees	O
the	O
processor	O
as	O
a	O
single	O
quad-core	B-Architecture
CPU	B-Device
.	O
</s>
<s>
The	O
SoC	B-Architecture
also	O
contains	O
an	O
IT	O
tri-core	B-Architecture
PowerVR	B-Device
SGX	O
544	O
graphics	B-Architecture
processing	I-Architecture
unit	I-Architecture
(	O
GPU	B-Architecture
)	O
.	O
</s>
<s>
Regional	O
models	O
of	O
the	O
S4	B-Application
vary	O
in	O
support	O
for	O
LTE	O
;	O
for	O
Exynos	O
5-based	O
models	O
,	O
while	O
the	O
E300K/L/S	O
versions	O
support	O
LTE	O
,	O
with	O
the	O
Cortex-A15	O
also	O
clocked	O
at	O
1.6GHz	O
.	O
</s>
<s>
the	O
GT-I9500	B-Application
model	O
does	O
not	O
.	O
</s>
<s>
The	O
S4	B-Application
GT-I9505	B-Application
includes	O
a	O
multiband	O
LTE	O
transceiver	O
.	O
</s>
<s>
On	O
24	O
June	O
2013	O
,	O
a	O
variant	O
supporting	O
LTE	O
Advanced	O
(	O
model	O
number	O
GT-i9506	B-Application
)	O
,	O
the	O
first	O
commercially	O
available	O
device	O
to	O
do	O
so	O
,	O
was	O
announced	O
for	O
South	O
Korea	O
.	O
</s>
<s>
In	O
December	O
2013	O
,	O
it	O
was	O
also	O
shipped	O
to	O
Germany	O
as	O
Samsung	B-Application
Galaxy	I-Application
S4	I-Application
LTE+	O
,	O
but	O
only	O
with	O
Telekom	O
and	O
Vodafone	O
branding	O
.	O
</s>
<s>
It	O
also	O
was	O
equipped	O
with	O
increased	O
processing	O
power	O
by	O
using	O
the	O
same	O
CPU	B-Device
(	O
Snapdragon	O
800	O
)	O
and	O
GPU	B-Architecture
(	O
Adreno	B-General_Concept
330	O
)	O
hardware	O
as	O
the	O
Galaxy	B-Application
Note	I-Application
3	I-Application
SM-N9005	B-Application
,	O
although	O
no	O
precluded	O
video	O
recording	O
capabilities	O
beyond	O
1080p	O
at	O
30fps	O
.	O
</s>
<s>
The	O
S4	B-Application
comes	O
with	O
either	O
16GB	O
,	O
32GB	O
,	O
64GB	O
of	O
internal	O
storage	O
,	O
which	O
can	O
be	O
supplemented	O
with	O
up	O
to	O
an	O
additional	O
64GB	O
with	O
a	O
microSD	O
card	O
slot	O
.	O
</s>
<s>
Unofficially	O
,	O
the	O
S4	B-Application
microSD	O
card	O
slot	O
supports	O
128GB	O
cards	O
as	O
well	O
.	O
</s>
<s>
The	O
S4	B-Application
contains	O
a	O
2600mAh	O
,	O
NFC-enabled	O
battery	O
.	O
</s>
<s>
The	O
S4	B-Application
was	O
originally	O
released	O
with	O
Android	B-Application
4.2.2	I-Application
and	O
Samsung	B-Application
's	O
TouchWiz	B-Application
Nature	O
UX	O
2	O
interface	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S4	I-Application
is	O
known	O
for	O
introducing	O
a	O
range	O
of	O
new	O
extended	O
interaction	O
features	O
to	O
the	O
Samsung	B-Application
Galaxy	I-Application
S	I-Application
series	I-Application
.	O
</s>
<s>
Head	B-General_Concept
tracking	I-General_Concept
features	O
have	O
been	O
extended	O
on	O
the	O
S4	B-Application
,	O
summarized	O
as	O
"	O
Samsung	B-Application
SmartScreen	O
"	O
.	O
</s>
<s>
and	O
"	O
Air	O
Gestures	O
"	O
implement	O
gestures	O
and	O
other	O
functionality	O
(	O
such	O
as	O
previewing	O
images	O
in	O
the	O
Gallery	O
,	O
messages	O
in	O
the	O
precluded	O
SMS/MMS	O
app	O
,	O
a	O
preview	O
of	O
the	O
contact	O
name	O
,	O
number	O
and	O
details	O
in	O
speed	O
dial	O
on	O
the	O
telephone	O
app	O
's	O
number	O
pad	O
,	O
and	O
a	O
preview	O
tooltip	O
when	O
hovering	O
above	O
the	O
seek	O
bar	O
in	O
the	O
video	O
player	O
and	O
showing	O
)	O
by	O
holding	O
or	O
swiping	O
a	O
hand	O
or	O
finger	O
slightly	O
above	O
the	O
screen	O
,	O
similarly	O
to	O
Samsung	B-Application
's	O
Galaxy	O
Note	O
series	O
,	O
and	O
adds	O
a	O
feature	O
known	O
as	O
"	O
Quick	O
Glance	O
"	O
,	O
which	O
uses	O
the	O
proximity	B-Device
sensor	I-Device
to	O
wake	O
the	O
phone	O
so	O
it	O
can	O
display	O
the	O
clock	O
,	O
notifications	O
and	O
status	O
such	O
as	O
battery	O
charge	O
.	O
</s>
<s>
These	O
interaction	O
features	O
were	O
later	O
inherited	O
by	O
the	O
Galaxy	B-Application
Note	I-Application
3	I-Application
and	O
the	O
Galaxy	B-Application
S5	I-Application
,	O
but	O
most	O
of	O
those	O
features	O
were	O
gradually	O
removed	O
from	O
Samsung	B-Application
's	O
flagship	O
phones	O
released	O
afterwards	O
.	O
</s>
<s>
The	O
camera	O
app	O
implements	O
numerous	O
new	O
features	O
(	O
some	O
of	O
which	O
were	O
first	O
seen	O
on	O
the	O
Galaxy	B-Algorithm
Camera	I-Algorithm
)	O
,	O
including	O
an	O
updated	O
interface	O
,	O
and	O
new	O
modes	O
such	O
as	O
"	O
Drama	O
"	O
(	O
which	O
composes	O
a	O
moving	O
element	O
from	O
multiple	O
shots	O
into	O
a	O
single	O
photo	O
)	O
,	O
"	O
Eraser	O
"	O
(	O
which	O
takes	O
multiple	O
shots	O
and	O
allows	O
the	O
user	O
to	O
remove	O
unnecessary	O
elements	O
from	O
a	O
picture	O
)	O
,	O
"	O
Dual	O
Shot	O
"	O
(	O
which	O
uses	O
the	O
front-facing	O
camera	O
for	O
a	O
picture-in-picture	O
effect	O
)	O
,	O
"	O
Sound	O
and	O
Shot	O
"	O
(	O
which	O
allows	O
the	O
user	O
to	O
record	O
a	O
voice	O
clip	O
alongside	O
a	O
photo	O
)	O
,	O
"	O
Animated	O
Photo	O
"	O
,	O
and	O
"	O
Story	O
Album	O
"	O
among	O
others	O
.	O
</s>
<s>
The	O
S4	B-Application
also	O
supports	O
High	B-Algorithm
Efficiency	I-Algorithm
Video	I-Algorithm
Coding	I-Algorithm
(	O
HEVC	B-Algorithm
)	O
,	O
a	O
next-generation	O
video	B-Application
codec	I-Application
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
Galaxy	B-Application
S4	I-Application
is	O
able	O
to	O
capture	O
9.6	O
Megapixel	O
(	O
4128×2322	O
)	O
still	O
photos	O
during	O
1080p	O
video	O
recording	O
,	O
even	O
with	O
enabled	O
digital	O
video	O
stabilization	O
.	O
</s>
<s>
While	O
the	O
camera	O
viewfinder	O
user	O
interface	O
of	O
the	O
2012	O
's	O
Samsung	B-Application
Galaxy	I-Application
S3	I-Application
,	O
Galaxy	B-Operating_System
Note	I-Operating_System
2	I-Operating_System
,	O
the	O
competing	O
iPhone	B-Operating_System
5	I-Operating_System
and	O
iPhone	B-Operating_System
5s	I-Operating_System
require	O
switching	O
between	O
photo	O
and	O
video	O
modes	O
,	O
the	O
viewfinder	O
of	O
the	O
Galaxy	B-Application
S4	I-Application
camera	O
software	O
shows	O
the	O
buttons	O
for	O
both	O
photo	O
and	O
video	O
capture	O
simultaneously	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S4	I-Application
is	O
equipped	O
with	O
a	O
range	O
of	O
accessibility	O
features	O
such	O
as	O
TalkBack	O
.	O
</s>
<s>
The	O
"	O
Group	O
Play	O
"	O
feature	O
allows	O
ad	O
hoc	O
sharing	O
of	O
files	O
between	O
Galaxy	O
phones	O
,	O
along	O
with	O
multiplayer	O
games	O
and	O
music	O
streaming	O
between	O
S4	B-Application
phones	O
.	O
</s>
<s>
The	O
S4	B-Application
also	O
introduces	O
Knox	B-Application
in	O
the	O
Android	B-Application
4.3	I-Application
update	O
,	O
a	O
suite	O
of	O
features	O
which	O
implements	O
a	O
sandbox	O
for	O
enterprise	O
environments	O
that	O
can	O
co-exist	O
with	O
a	O
user	O
's	O
"	O
personal	O
"	O
data	O
.	O
</s>
<s>
Knox	B-Application
incorporates	O
use	O
of	O
the	O
ARM	O
TrustZone	O
extensions	O
and	O
security	O
enhancements	O
to	O
the	O
Android	B-Application
platform	I-Application
.	O
</s>
<s>
The	O
TouchWiz	B-Application
keyboard	O
application	O
on	O
the	O
Galaxy	B-Application
S4	I-Application
has	O
a	O
built-in	O
clipboard	O
feature	O
that	O
allows	O
holding	O
up	O
to	O
twenty	O
items	O
such	O
as	O
text	O
and	O
screenshots	O
.	O
</s>
<s>
The	O
precluded	O
optical	O
reader	O
feature	O
allows	O
the	O
optical	B-Application
character	I-Application
recognition	I-Application
of	O
pictures	O
through	O
the	O
camera	O
or	O
a	O
picture	O
stored	O
in	O
the	O
gallery	O
.	O
</s>
<s>
Other	O
new	O
pre-loaded	O
apps	O
include	O
WatchOn	O
(	O
an	O
electronic	B-Device
program	I-Device
guide	I-Device
that	O
can	O
utilize	O
the	O
S4	B-Application
's	O
infrared	O
transmitter	O
to	O
be	O
a	O
remote	B-Protocol
control	I-Protocol
)	O
,	O
S	O
Translator	O
,	O
the	O
workout	O
tracker	O
S	O
Health	O
,	O
S	B-General_Concept
Voice	I-General_Concept
Drive	O
,	O
S	O
Memo	O
,	O
TripAdvisor	O
,	O
and	O
an	O
optical	B-Application
character	I-Application
recognition	I-Application
app	O
.	O
</s>
<s>
The	O
previous	O
"	O
Hub	O
"	O
apps	O
from	O
past	O
Samsung	B-Application
devices	O
were	O
replaced	O
by	O
a	O
single	O
Samsung	B-Application
Hub	O
app	O
,	O
with	O
access	O
to	O
music	O
,	O
e-books	O
,	O
and	O
games	O
that	O
can	O
be	O
purchased	O
by	O
users	O
.	O
</s>
<s>
In	O
November	O
2013	O
,	O
Samsung	B-Application
began	O
rolling	O
out	O
an	O
update	O
to	O
Android	B-Application
4.3	I-Application
for	O
the	O
S4	B-Application
,	O
notably	O
adding	O
the	O
Bluetooth	B-General_Concept
low	I-General_Concept
energy	I-General_Concept
support	O
needed	O
for	O
compatibility	O
with	O
the	O
Galaxy	B-Application
Gear	I-Application
smartwatch	B-Application
.	O
</s>
<s>
However	O
,	O
Samsung	B-Application
halted	O
the	O
rollout	O
following	O
reports	O
from	O
Galaxy	B-Application
S	I-Application
III	I-Application
users	O
that	O
Samsung	B-Application
's	O
version	O
of	O
4.3	O
had	O
caused	O
instability	O
and	O
increased	O
battery	O
usage	O
.	O
</s>
<s>
In	O
February	O
2014	O
,	O
Samsung	B-Application
began	O
rolling	O
out	O
an	O
update	O
to	O
Android	B-Application
4.4.2	I-Application
"	I-Application
KitKat	I-Application
"	I-Application
for	O
the	O
S4	B-Application
;	O
the	O
update	O
adds	O
user	O
interface	O
tweaks	O
such	O
as	O
a	O
camera	O
shortcut	O
on	O
the	O
corner	O
of	O
the	O
lock	O
screen	O
,	O
options	O
for	O
setting	O
default	O
launcher	O
and	O
text	O
messaging	O
applications	O
,	O
support	O
for	O
printing	O
,	O
and	O
a	O
new	O
location	O
settings	O
menu	O
for	O
tracking	O
and	O
controlling	O
the	O
use	O
of	O
location	O
tracking	O
by	O
apps	O
.	O
</s>
<s>
Although	O
this	O
behavior	O
has	O
existed	O
since	O
Android	B-Application
3.0	O
"	O
Honeycomb	O
"	O
,	O
OEMs	O
such	O
as	O
Samsung	B-Application
previously	O
modified	O
their	O
distributions	O
of	O
Android	B-Application
to	O
retain	O
the	O
previous	O
behavior	O
,	O
allowing	O
applications	O
to	O
have	O
unlimited	O
access	O
to	O
SD	O
card	O
contents	O
.	O
</s>
<s>
In	O
January	O
2015	O
,	O
Samsung	B-Application
began	O
rolling	O
out	O
an	O
update	O
to	O
Android	B-Application
5.0.1	I-Application
"	O
Lollipop	B-Application
"	O
in	O
Russia	O
and	O
India	O
,	O
an	O
update	O
which	O
brings	O
all	O
the	O
features	O
of	O
Lollipop	B-Application
,	O
such	O
as	O
enhanced	O
performance	O
and	O
lockscreen	O
,	O
including	O
a	O
refined	O
interface	O
with	O
a	O
flatter	O
and	O
geometric	O
look	O
,	O
as	O
seen	O
on	O
the	O
Galaxy	B-Application
S5	I-Application
.	O
</s>
<s>
Samsung	B-Application
paused	O
the	O
rollout	O
soon	O
after	O
,	O
when	O
users	O
reported	O
major	O
bugs	O
.	O
</s>
<s>
US	O
(	O
starting	O
with	O
AT&T	O
and	O
Sprint	O
)	O
and	O
Canadian	O
Samsung	B-Application
Galaxy	I-Application
S4	I-Application
models	O
received	O
Android	B-Application
5.0.1	I-Application
Lollipop	B-Application
update	O
in	O
April	O
2015	O
.	O
</s>
<s>
Several	O
different	O
model	O
variants	O
of	O
the	O
S4	B-Application
are	O
sold	O
,	O
with	O
most	O
variants	O
varying	O
mainly	O
in	O
handling	O
regional	O
network	O
types	O
and	O
bands	O
.	O
</s>
<s>
To	O
prevent	O
grey	O
market	O
reselling	O
,	O
models	O
of	O
the	O
S4	B-Application
manufactured	O
after	O
July	O
2013	O
implement	O
a	O
regional	O
lockout	O
system	B-General_Concept
in	O
certain	O
regions	O
,	O
requiring	O
that	O
the	O
first	O
SIM	O
card	O
used	O
on	O
a	O
European	O
and	O
North	O
American	O
model	O
be	O
from	O
a	O
carrier	O
in	O
that	O
region	O
.	O
</s>
<s>
Samsung	B-Application
stated	O
that	O
the	O
lock	O
would	O
be	O
removed	O
once	O
a	O
local	O
SIM	O
card	O
is	O
used	O
.	O
</s>
<s>
900	O
,	O
1800	O
,	O
1900	O
MHzGSM	O
/	O
GPRS	B-General_Concept
/	O
EDGE	O
850	O
,	O
900	O
,	O
1800	O
,	O
1900	O
MHzGSM	O
/	O
GPRS	B-General_Concept
/	O
EDGE	O
3G	B-Architecture
850	O
,	O
900	O
,	O
1900	O
,	O
2100	O
MHzUMTS	O
/	O
HSPA+	O
E300L	O
:	O
EV-DO	O
Rev	O
.	O
</s>
<s>
A	O
:	O
3.1	O
Mbit/s	O
DC-HSPA	O
+	O
:	O
42	O
Mbit/s	O
LTE	O
:	O
100	O
Mbit/s	O
Broadcastreceiver	O
No	O
T-DMB	O
No1segISDB-Tmm	O
Dimensions	O
Weight	O
Operatingsystem	B-General_Concept
Android	B-Application
4.2.2	I-Application
with	O
TouchWiz	B-Application
Nature	O
UX	O
2.0	O
(	O
OTA	O
upgrade	O
to	O
5.0.1	O
available	O
)	O
Stock	O
Android	B-Application
4.2.2	I-Application
(	O
OTA	O
upgrade	O
to	O
5.0.1	O
available	O
)	O
Android	B-Application
4.2.2	I-Application
with	O
TouchWiz	B-Application
Nature	O
UX	O
2.0	O
(	O
OTA	O
upgrade	O
to	O
5.0.1	O
available	O
)	O
Wi-Fi	O
Broadcom	O
BCM4335	O
a/b/g/n/ac	O
+	O
Bluetooth	B-Protocol
GPS	O
Broadcom	O
BCM47521	O
?	O
</s>
<s>
At	O
the	B-Application
Google	I-Application
I/O	O
2013	O
keynote	O
,	O
Samsung	B-Application
and	O
Google	B-Application
revealed	O
that	O
an	O
edition	O
of	O
the	O
U.S.	O
S4	B-Application
would	O
be	O
released	O
on	O
June	O
26	O
,	O
2013	O
through	O
Google	B-Application
Play	I-Application
,	O
with	O
the	O
HTC	B-Application
One	I-Application
M7	I-Application
,	O
Sony	O
Xperia	O
Z	O
Ultra	O
,	O
Motorola	B-Application
Moto	I-Application
G	I-Application
,	O
and	O
HTC	B-Application
One	I-Application
M8	I-Application
releasing	O
later	O
on	O
.	O
</s>
<s>
initially	O
featuring	O
stock	O
Android	B-Application
4.2.2	I-Application
,	O
the	O
phone	O
later	O
updated	O
to	O
4.4.4	B-Application
,	O
with	O
Samsung	B-Application
provided	O
updates	O
;	O
it	O
has	O
an	O
unlockable	O
bootloader	O
(	O
similar	O
to	O
Nexus	B-Device
devices	O
)	O
and	O
supports	O
LTE	O
on	O
AT&T	O
and	O
T-Mobile	O
'	O
s	O
networks	O
.	O
</s>
<s>
At	O
retail	O
,	O
the	O
S4	B-Application
is	O
bundled	O
with	O
a	O
USB	B-Protocol
cable	O
,	O
AC	O
adapter	O
,	O
and	O
in-ear	B-Device
headphones	I-Device
.	O
</s>
<s>
When	O
this	O
cover	O
is	O
detected	O
(	O
by	O
a	O
hall	B-Algorithm
effect	I-Algorithm
sensor	I-Algorithm
)	O
,	O
the	O
time	O
and	O
battery	O
are	O
displayed	O
in	O
this	O
cover	O
's	O
window	O
area	O
.	O
</s>
<s>
While	O
some	O
users	O
considered	O
all	O
new	O
Galaxy	B-Application
S4	I-Application
features	O
innovative	O
and	O
legitimately	O
useful	O
,	O
others	O
called	O
them	O
feature	O
creep	O
or	O
just	O
gimmicks	O
.	O
</s>
<s>
These	O
features	O
and	O
sensors	O
are	O
available	O
and	O
optionally	O
utilizable	O
for	O
users	O
and	O
software	O
that	O
needs	O
them.Additionally	O
,	O
the	O
Galaxy	B-Application
S4	I-Application
is	O
equipped	O
with	O
an	O
“	O
easy	O
mode	O
”	O
that	O
hides	O
many	O
features	O
and	O
increases	O
the	O
size	O
of	O
on-screen	O
elements	O
for	O
easier	O
readability	O
for	O
novice	O
mobile	O
phone	O
users	O
.	O
</s>
<s>
The	O
S4	B-Application
received	O
many	O
positive	O
reviews	O
,	O
though	O
some	O
criticism	O
.	O
</s>
<s>
Gigaom	O
's	O
Tofel	O
says	O
he	O
would	O
recommend	O
the	O
S4	B-Application
"	O
without	O
hesitation	O
"	O
and	O
says	O
that	O
it	O
's	O
"	O
Samsung	B-Application
's	O
defining	O
phone	O
"	O
.	O
</s>
<s>
ReadWrite	O
's	O
Rowinski	O
described	O
the	O
phone	O
as	O
a	O
"	O
solid	O
"	O
and	O
"	O
first-rate	O
smartphone	B-Application
"	O
,	O
but	O
criticised	O
Samsung	B-Application
's	O
use	O
of	O
"	O
bloatware	O
,	O
pre-loaded	O
apps	O
and	O
features	O
that	O
you	O
will	O
likely	O
never	O
use	O
"	O
.	O
</s>
<s>
TIME'''s	O
McCraken	O
says	O
the	O
S4	B-Application
is	O
a	O
smartphone	B-Application
with	O
everything	O
;	O
it	O
has	O
the	O
biggest	O
screen	O
and	O
the	O
most	O
built-in	O
features	O
.	O
</s>
<s>
He	O
wishes	O
the	O
S4	B-Application
would	O
mark	O
the	O
end	O
of	O
Samsung	B-Application
's	O
plan	O
to	O
add	O
too	O
many	O
new	O
features	O
with	O
its	O
flagship	O
smartphones	B-Application
.	O
</s>
<s>
Technology	O
journalist	O
Walt	O
Mossberg	O
described	O
the	O
S4	B-Application
as	O
"	O
a	O
good	O
phone	O
,	O
just	O
not	O
a	O
great	O
one	O
"	O
.	O
</s>
<s>
He	O
criticized	O
the	O
software	O
as	O
"	O
especially	O
weak	O
"	O
and	O
"	O
often	O
gimmicky	O
,	O
duplicative	O
of	O
standard	O
Android	B-Application
apps	O
,	O
or	O
,	O
in	O
some	O
cases	O
,	O
only	O
intermittently	O
functional.	O
"	O
</s>
<s>
He	O
urged	O
readers	O
to	O
"	O
consider	O
the	O
more	O
polished-looking	O
,	O
and	O
quite	O
capable	O
,	O
HTC	B-Application
One	I-Application
,	O
rather	O
than	O
defaulting	O
to	O
the	O
latest	O
Samsung	B-Application
.	O
</s>
<s>
"	O
Consumer	O
Reports	O
named	O
the	O
S4	B-Application
as	O
the	O
top	O
smartphone	B-Application
as	O
of	O
May	O
2013	O
due	O
to	O
its	O
screen	O
quality	O
,	O
multitasking	O
support	O
,	O
and	O
built-in	O
IR	O
blaster	O
.	O
</s>
<s>
Critics	O
noted	O
that	O
about	O
half	O
of	O
the	O
internal	O
storage	O
on	O
the	O
S4	B-Application
's	O
16	O
GB	O
model	O
was	O
taken	O
up	O
by	O
its	O
system	B-General_Concept
software	O
,	O
using	O
1	O
GB	O
more	O
than	O
the	O
S	B-Application
III	I-Application
and	O
leaving	O
only	O
8.5	O
to	O
9.15	O
GB	O
for	O
the	O
storage	O
of	O
other	O
data	O
,	O
including	O
downloaded	O
apps	O
(	O
some	O
of	O
which	O
cannot	O
be	O
moved	O
to	O
the	O
SD	O
card	O
)	O
.	O
</s>
<s>
Samsung	B-Application
initially	O
stated	O
that	O
the	O
space	O
was	O
required	O
for	O
the	O
S4	B-Application
's	O
new	O
features	O
,	O
but	O
following	O
a	O
report	O
regarding	O
the	O
issue	O
on	O
the	O
BBC	O
series	O
Watchdog''	O
,	O
Samsung	B-Application
stated	O
that	O
it	O
would	O
review	O
the	O
possibility	O
of	O
optimising	O
the	O
S4	B-Application
's	O
operating	B-General_Concept
system	I-General_Concept
to	O
use	O
less	O
local	O
drive	O
space	O
in	O
a	O
future	O
update	O
.	O
</s>
<s>
The	O
S4	B-Application
reached	O
10	O
million	O
pre-orders	O
from	O
retailers	O
in	O
the	O
first	O
two	O
weeks	O
after	O
its	O
announcement	O
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
this	O
prompted	O
Samsung	B-Application
to	O
announce	O
that	O
due	O
to	O
larger	O
than	O
expected	O
demand	O
,	O
the	O
roll	O
out	O
of	O
devices	O
on	O
U.S.	O
carriers	O
Sprint	O
and	O
T-Mobile	O
would	O
be	O
slower	O
than	O
expected	O
.	O
</s>
<s>
The	O
S4	B-Application
sold	O
4	O
million	O
in	O
4	O
days	O
and	O
10	O
million	O
in	O
27	O
days	O
making	O
it	O
the	O
then	O
fastest	O
selling	O
smartphone	B-Application
in	O
Samsung	B-Application
's	O
history	O
(	O
this	O
has	O
been	O
eclipsed	O
by	O
the	O
Galaxy	B-Application
S5	I-Application
)	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S	I-Application
III	I-Application
sold	O
4	O
million	O
units	O
in	O
21	O
days	O
,	O
the	O
Galaxy	B-Application
S	I-Application
II	I-Application
took	O
55	O
days	O
and	O
the	O
Galaxy	B-Application
S	I-Application
took	O
85	O
days	O
.	O
</s>
<s>
Samsung	B-Application
shipped	O
more	O
than	O
20	O
million	O
S4	B-Application
smartphones	B-Application
by	O
June	O
30	O
,	O
which	O
is	O
around	O
1.7	O
times	O
faster	O
than	O
the	O
Galaxy	B-Application
S	I-Application
III	I-Application
.	O
</s>
<s>
As	O
of	O
October	O
23	O
,	O
2013	O
,	O
Samsung	B-Application
has	O
sold	O
over	O
40	O
million	O
S4	B-Application
units	O
six	O
months	O
after	O
release	O
.	O
</s>
<s>
A	O
house	O
in	O
Hong	O
Kong	O
is	O
alleged	O
to	O
have	O
been	O
set	O
on	O
fire	O
by	O
an	O
S4	B-Application
in	O
July	O
2013	O
,	O
followed	O
by	O
a	O
minor	O
burnt	O
S4	B-Application
in	O
Pakistan	O
.	O
</s>
<s>
Some	O
users	O
of	O
the	O
phone	O
have	O
also	O
reported	O
swelling	O
batteries	O
and	O
overheating	O
;	O
Samsung	B-Application
has	O
offered	O
affected	O
customers	O
new	O
batteries	O
free	O
of	O
charge	O
.	O
</s>
<s>
On	O
December	O
2	O
,	O
2013	O
,	O
Canadian	O
Richard	O
Wygand	O
uploaded	O
a	O
YouTube	B-General_Concept
video	I-General_Concept
describing	O
his	O
phone	O
combusting	O
.	O
</s>
<s>
In	O
his	O
second	O
video	O
,	O
uploaded	O
a	O
few	O
days	O
after	O
the	O
first	O
one	O
,	O
Wygand	O
states	O
that	O
in	O
order	O
to	O
receive	O
a	O
replacement	O
phone	O
,	O
Samsung	B-Application
allegedly	O
asked	O
him	O
to	O
sign	O
a	O
legal	O
document	O
requiring	O
him	O
to	O
remove	O
the	O
video	O
,	O
remain	O
silent	O
about	O
the	O
agreement	O
,	O
and	O
surrender	O
any	O
future	O
claims	O
against	O
the	O
company	O
.	O
</s>
<s>
In	O
an	O
interview	O
with	O
Mashable	O
,	O
Wygand	O
said	O
that	O
since	O
he	O
posted	O
the	O
second	O
video	O
,	O
no	O
further	O
response	O
from	O
Samsung	B-Application
was	O
received	O
.	O
</s>
<s>
However	O
,	O
an	O
official	O
spokesman	O
from	O
Samsung	B-Application
told	O
Mashable	O
,	O
"	O
Samsung	B-Application
takes	O
the	O
safety	O
and	O
security	O
of	O
our	O
customers	O
very	O
seriously	O
.	O
</s>
<s>
Our	O
Samsung	B-Application
Canada	O
team	O
is	O
in	O
touch	O
with	O
the	O
customer	O
,	O
and	O
is	O
investigating	O
the	O
issue.	O
"	O
</s>
<s>
In	O
the	O
UK	O
,	O
companies	O
which	O
sold	O
the	O
S4	B-Application
have	O
varied	O
in	O
their	O
reactions	O
to	O
claims	O
by	O
worried	O
customers	O
for	O
replacement	O
batteries	O
under	O
the	O
Sale	O
of	O
Goods	O
Act	O
.	O
</s>
<s>
Amazon	B-Application
,	O
for	O
example	O
,	O
have	O
simply	O
refunded	O
part	O
of	O
the	O
purchase	O
price	O
to	O
allow	O
for	O
the	O
cost	O
of	O
a	O
replacement	O
battery	O
.	O
</s>
<s>
O2	O
however	O
insist	O
that	O
the	O
complete	O
phone	O
,	O
with	O
the	O
faulty	O
battery	O
,	O
be	O
returned	O
to	O
them	O
so	O
that	O
they	O
in	O
turn	O
can	O
send	O
it	O
to	O
Samsung	B-Application
to	O
consider	O
the	O
claim	O
.	O
</s>
