<s>
The	O
LG	B-Application
G4	I-Application
is	O
an	O
Android	B-Application
smartphone	B-Application
developed	O
by	O
LG	O
Electronics	O
as	O
part	O
of	O
the	O
LG	B-Application
G	I-Application
series	I-Application
.	O
</s>
<s>
Unveiled	O
on	O
28	O
April	O
2015	O
and	O
first	O
released	O
in	O
South	O
Korea	O
on	O
29	O
April	O
2015	O
and	O
widely	O
released	O
in	O
June	O
2015	O
,	O
as	O
the	O
successor	O
to	O
2014	O
's	O
G3	B-Application
.	O
</s>
<s>
The	O
G4	O
is	O
primarily	O
an	O
evolution	O
of	O
the	O
G3	B-Application
,	O
with	O
revisions	O
to	O
its	O
overall	O
design	O
,	O
display	O
and	O
camera	O
.	O
</s>
<s>
The	O
G4	O
received	O
mixed	O
to	O
positive	O
reviews	O
;	O
while	O
praising	O
the	O
G4	O
's	O
display	O
quality	O
,	O
camera	O
,	O
and	O
overall	O
performance	O
,	O
critics	O
characterized	O
the	O
G4	O
as	O
being	O
a	O
robust	O
device	O
that	O
did	O
not	O
contain	O
enough	O
substantial	O
changes	O
or	O
innovation	O
over	O
its	O
predecessor	O
to	O
make	O
the	O
device	O
stand	O
out	O
against	O
its	O
major	O
competitors	O
,	O
but	O
could	O
appeal	O
to	O
power	O
users	O
needing	O
a	O
smartphone	B-Application
with	O
expandable	O
storage	O
and	O
a	O
removable	O
battery	O
due	O
to	O
the	O
exclusion	O
of	O
these	O
features	O
from	O
its	O
main	O
competitor	O
on	O
launch	O
,	O
the	O
Samsung	B-Application
Galaxy	I-Application
S6	I-Application
.	O
</s>
<s>
The	O
design	O
of	O
the	O
G4	O
is	O
an	O
evolution	O
of	O
the	O
G3	B-Application
,	O
maintaining	O
elements	O
such	O
as	O
its	O
rear-located	O
volume	O
and	O
camera	O
buttons	O
.	O
</s>
<s>
The	O
G4	O
features	O
a	O
,	O
1440p	O
"	B-Architecture
Quantum	I-Architecture
IPS	I-Architecture
"	I-Architecture
display	O
,	O
which	O
LG	O
stated	O
would	O
provide	O
better	O
contrast	O
,	O
color	O
accuracy	O
and	O
energy	O
efficiency	O
over	O
another	O
display	O
that	O
LG	O
did	O
not	O
explicitly	O
specify	O
.	O
</s>
<s>
The	O
G4	O
utilizes	O
a	O
hexa-core	B-Architecture
Snapdragon	B-Architecture
808	O
with	O
3GB	O
of	O
RAM	B-Architecture
,	O
consisting	O
of	O
four	O
low-power	O
Cortex-A53	O
cores	O
and	O
two	O
Cortex-A57	O
cores	O
.	O
</s>
<s>
The	O
rear-facing	O
camera	O
has	O
a	O
16-megapixel	O
sensor	O
with	O
a	O
f/1.8	O
aperture	B-General_Concept
lens	O
,	O
infrared	O
active	O
autofocus	O
,	O
three-axis	O
optical	O
image	O
stabilization	O
,	O
and	O
LED	O
flash	O
.	O
</s>
<s>
A	O
"	O
RGB	O
color	O
spectrum	O
sensor	O
"	O
is	O
located	O
below	O
the	O
flash	O
,	O
which	O
analyzes	O
ambient	O
lighting	O
to	O
optimize	O
the	O
white	B-Algorithm
balance	I-Algorithm
and	O
flash	O
color	O
to	O
generate	O
more	O
natural-looking	O
images	O
.	O
</s>
<s>
The	O
front-facing	O
camera	O
is	O
8-megapixels	O
with	O
an	O
aperture	B-General_Concept
of	O
f/2.0	O
.	O
</s>
<s>
While	O
main	O
camera	O
is	O
able	O
to	O
record	B-Application
video	I-Application
at	O
2160p	O
(	O
4K	B-Architecture
)	O
with	O
30fps	O
and	O
720p	O
(	O
HD	O
)	O
with	O
120fps	O
,	O
1080p	O
(	O
Full	O
HD	O
)	O
is	O
unconventionally	O
limited	O
to	O
30fps	O
,	O
rather	O
than	O
60fps	O
,	O
as	O
from	O
competing	O
mobile	O
phones	O
such	O
as	O
the	O
Samsung	B-Application
Galaxy	I-Application
S6	I-Application
,	O
the	O
HTC	B-Application
One	I-Application
M9	I-Application
and	O
the	O
iPhone	B-Operating_System
6	I-Operating_System
.	O
</s>
<s>
The	O
G4	O
is	O
supplied	O
with	O
Android	B-Application
5.1	I-Application
"	I-Application
Lollipop	I-Application
"	I-Application
,	O
although	O
the	O
overall	O
user	O
experience	O
is	O
relatively	O
similar	O
to	O
that	O
of	O
the	O
G3	B-Application
.	O
</s>
<s>
The	O
camera	O
software	O
was	O
upgraded	O
with	O
raw	B-Application
image	I-Application
support	O
,	O
along	O
with	O
a	O
new	O
manual	O
mode	O
offering	O
the	O
ability	O
to	O
adjust	O
the	O
focus	O
,	O
shutter	O
speed	O
,	O
ISO	O
and	O
white	B-Algorithm
balance	I-Algorithm
.	O
</s>
<s>
On	O
October	O
14	O
,	O
2015	O
,	O
LG	O
announced	O
that	O
the	O
G4	O
would	O
be	O
upgraded	O
to	O
Android	B-Application
6.0	I-Application
"	I-Application
Marshmallow	I-Application
"	I-Application
,	O
with	O
its	O
release	O
beginning	O
in	O
Poland	O
the	O
following	O
week	O
.	O
</s>
<s>
Android	B-Application
7.0	I-Application
"	I-Application
Nougat	I-Application
"	I-Application
became	O
available	O
for	O
selected	O
models	O
in	O
July	O
2017	O
.	O
</s>
<s>
The	O
Verge	O
felt	O
that	O
the	O
G4	O
could	O
appeal	O
to	O
power	O
users	O
alienated	O
by	O
the	O
removal	O
of	O
expandable	O
storage	O
and	O
replaceable	O
batteries	O
on	O
the	O
then-recently	O
released	O
Samsung	B-Application
Galaxy	I-Application
S6	I-Application
.	O
</s>
<s>
The	O
display	O
was	O
praised	O
for	O
its	O
improved	O
color	O
accuracy	O
and	O
energy	O
efficiency	O
over	O
the	O
G3	B-Application
,	O
remarking	O
that	O
it	O
was	O
"	O
as	O
good	O
,	O
if	O
not	O
better	O
"	O
,	O
than	O
the	O
S6	O
.	O
</s>
<s>
The	O
G4	O
's	O
rear	O
camera	O
was	O
praised	O
for	O
its	O
quality	O
and	O
color	O
reproduction	O
,	O
along	O
with	O
its	O
"	O
comprehensive	O
"	O
manual	O
mode	O
and	O
its	O
"	O
uncommon	O
"	O
ability	O
to	O
save	O
raw	B-Application
images	I-Application
,	O
but	O
it	O
was	O
noted	O
that	O
its	O
autofocus	O
sometimes	O
missed	O
focus	O
or	O
took	O
long	O
to	O
achieve	O
focus	O
,	O
and	O
that	O
the	O
manual	O
mode	O
did	O
not	O
offer	O
saturation	O
or	O
sharpness	O
controls	O
.	O
</s>
<s>
LG	O
's	O
software	O
was	O
criticized	O
for	O
being	O
relatively	O
unchanged	O
from	O
the	O
G3	B-Application
,	O
and	O
for	O
suffering	O
from	O
feature	O
creep	O
and	O
"	O
ugly	O
"	O
aesthetics	O
.	O
</s>
<s>
The	O
performance	O
of	O
the	O
LG	B-Application
G4	I-Application
was	O
contrasted	O
to	O
devices	O
that	O
utilize	O
Qualcomm	O
's	O
Snapdragon	B-Architecture
810	O
(	O
such	O
as	O
the	O
LG	B-Application
G	I-Application
Flex	I-Application
2	I-Application
)	O
,	O
which	O
was	O
known	O
to	O
have	O
overheating	O
problems	O
.	O
</s>
<s>
Ars	O
Technica	O
felt	O
that	O
the	O
need	O
to	O
throttle	O
CPU-intensive	O
tasks	O
to	O
prevent	O
overheating	O
had	O
a	O
negative	O
effect	O
on	O
the	O
810	O
's	O
performance	O
,	O
arguing	O
that	O
as	O
a	O
result	O
,	O
the	O
G4	O
's	O
Snapdragon	B-Architecture
808	O
performed	O
better	O
in	O
some	O
cases	O
than	O
the	O
810	O
(	O
represented	O
in	O
comparison	O
testing	O
by	O
the	O
HTC	B-Application
One	I-Application
M9	I-Application
)	O
,	O
but	O
that	O
the	O
Exynos	O
processor	O
of	O
the	O
Galaxy	B-Application
S6	I-Application
had	O
better	O
overall	O
performance	O
than	O
the	O
two	O
Snapdragon	B-Architecture
chips	O
on	O
benchmarks	O
.	O
</s>
<s>
Considering	O
its	O
camera	O
to	O
be	O
the	O
best	O
part	O
of	O
the	O
device	O
,	O
Ars	O
Technica	O
concluded	O
that	O
the	O
G4	O
was	O
"	O
a	O
perfectly	O
competent	O
smartphone	B-Application
,	O
but	O
does	O
n't	O
really	O
stand	O
out	O
much.	O
"	O
</s>
<s>
Some	O
users	O
reported	O
inconsistencies	O
in	O
the	O
performance	O
of	O
the	O
G4	O
's	O
touchscreen	B-Device
,	O
with	O
some	O
units	O
—	O
particularly	O
U.S.	O
T-Mobile	O
and	O
Verizon	O
variants	O
—	O
having	O
problems	O
registering	O
quick	O
taps	O
and	O
swipes	O
.	O
</s>
<s>
LG	O
released	O
an	O
update	O
to	O
fix	O
the	O
problem	O
in	O
its	O
keyboard	O
app	O
in	O
June	O
2015	O
,	O
followed	O
by	O
Verizon	O
releasing	O
a	O
major	O
OTA	O
update	O
in	O
November	O
2015	O
to	O
fix	O
the	O
touchscreen	B-Device
problems	O
and	O
address	O
other	O
problems	O
with	O
the	O
device	O
.	O
</s>
<s>
In	O
March	O
2017	O
,	O
a	O
class-action	O
lawsuit	O
was	O
filed	O
against	O
LG	O
Electronics	O
in	O
the	O
U.S.	O
state	O
of	O
California	O
,	O
alleging	O
that	O
despite	O
acknowledging	O
its	O
existence	O
,	O
LG	O
continued	O
to	O
produce	O
units	O
of	O
the	O
G4	O
and	O
its	O
sister	O
model	O
,	O
the	O
V10	B-Application
,	O
with	O
the	O
defect	O
,	O
and	O
distributed	O
phones	O
that	O
could	O
succumb	O
to	O
the	O
defects	O
as	O
warranty	O
replacements	O
.	O
</s>
<s>
In	O
January	O
2018	O
,	O
LG	O
agreed	O
to	O
pay	O
the	O
participants	O
in	O
the	O
lawsuit	O
a	O
$700	O
credit	O
towards	O
the	O
purchase	O
of	O
a	O
LG	O
smartphone	B-Application
or	O
$425	O
.	O
</s>
