<s>
The	O
HTC	B-Application
One	I-Application
(	O
M8	O
)	O
(	O
also	O
marketed	O
as	O
the	O
all-new	O
HTC	B-Application
One	I-Application
)	O
is	O
an	O
Android	B-Application
or	O
Windows	B-Protocol
smartphone	B-Application
manufactured	O
and	O
marketed	O
by	O
HTC	B-Application
.	O
</s>
<s>
Following	O
a	O
number	O
of	O
leaks	O
that	O
occurred	O
during	O
the	O
months	O
prior	O
,	O
the	O
device	O
was	O
officially	O
unveiled	O
in	O
a	O
press	O
conference	O
on	O
March	O
25	O
,	O
2014	O
,	O
and	O
released	O
the	O
same	O
day	O
by	O
Verizon	B-Application
Wireless	I-Application
at	O
retail	O
,	O
and	O
by	O
other	O
Canadian	O
and	O
United	O
States	O
carriers	O
for	O
online	O
orders	O
prior	O
to	O
its	O
wider	O
retail	O
availability	O
in	O
mid-April	O
.	O
</s>
<s>
The	O
device	O
retains	O
a	O
similar	O
design	O
to	O
the	O
HTC	B-Application
One	I-Application
(	O
M7	O
)	O
,	O
its	O
predecessor	O
in	O
the	O
HTC	B-Application
One	I-Application
series	I-Application
,	O
but	O
features	O
a	O
larger	O
,	O
rounded	O
chassis	O
incorporating	O
a	O
5-inch	O
1080p	O
display	O
,	O
a	O
quad-core	O
Qualcomm	B-Architecture
Snapdragon	I-Architecture
801	O
processor	O
,	O
a	O
depth	O
of	O
field	O
sensor	O
which	O
can	O
be	O
used	O
to	O
individually	O
refocus	O
and	O
apply	O
various	O
effects	O
to	O
the	O
foreground	O
and	O
background	O
elements	O
of	O
photos	O
taken	O
with	O
the	O
device	O
's	O
camera	O
,	O
a	O
higher	O
resolution	O
front	O
camera	O
,	O
improvements	O
to	O
the	O
device	O
's	O
front-facing	O
stereo	O
speakers	O
,	O
expandable	O
storage	O
,	O
new	O
gesture	O
functionality	O
,	O
and	O
a	O
refreshed	O
version	O
of	O
HTC	B-Application
's	O
Sense	B-Application
software	O
.	O
</s>
<s>
In	O
August	O
2014	O
,	O
HTC	B-Application
unveiled	O
a	O
software	O
variant	O
of	O
the	O
device	O
running	O
Windows	B-Protocol
Phone	I-Protocol
8.1	I-Protocol
instead	O
of	O
Android	B-Application
,	O
aiming	O
to	O
adapt	O
the	O
operating	O
system	O
's	O
experience	O
to	O
the	O
device	O
"[without]	O
any	O
compromises.	O
"	O
</s>
<s>
Although	O
it	O
was	O
once	O
a	O
leading	O
manufacturer	O
of	O
smartphones	B-Application
in	O
terms	O
of	O
market	O
share	O
,	O
HTC	B-Application
has	O
struggled	O
in	O
the	O
wake	O
of	O
other	O
vendors	O
such	O
as	O
Samsung	B-Application
and	O
Apple	O
,	O
due	O
particularly	O
to	O
their	O
wider	O
marketing	O
reach	O
.	O
</s>
<s>
As	O
was	O
common	O
during	O
the	O
early	O
years	O
of	O
Android	B-Application
,	O
HTC	B-Application
manufactured	O
a	O
large	O
number	O
of	O
exclusive	O
devices	O
customized	O
for	O
several	O
major	O
U.S.	O
carriers	O
,	O
who	O
took	O
on	O
the	O
role	O
of	O
marketing	O
them	O
.	O
</s>
<s>
In	O
2013	O
,	O
HTC	B-Application
chose	O
to	O
release	O
a	O
single	O
flagship	O
device	O
,	O
the	O
HTC	B-Application
One	I-Application
,	O
across	O
multiple	O
carriers	O
,	O
and	O
handled	O
much	O
of	O
its	O
marketing	O
and	O
promotion	O
.	O
</s>
<s>
HTC	B-Application
continued	O
to	O
lose	O
market	O
share	O
,	O
and	O
in	O
October	O
2013	O
,	O
had	O
its	O
first-ever	O
quarterly	O
loss	O
—	O
which	O
is	O
attributed	O
to	O
poor	O
marketing	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
HTC	B-Application
planned	O
to	O
"	O
leverage	O
the	O
momentum	O
"	O
and	O
critical	O
success	O
of	O
the	O
One	O
to	O
produce	O
an	O
updated	O
version	O
for	O
2014	O
,	O
expanding	O
upon	O
concepts	O
introduced	O
by	O
the	O
previous	O
model	O
.	O
</s>
<s>
The	O
company	O
also	O
planned	O
to	O
release	O
a	O
"	O
much	O
broader	O
spectrum	O
of	O
products	O
"	O
in	O
2014	O
,	O
by	O
placing	O
an	O
increased	O
focus	O
on	O
the	O
mid-range	O
smartphone	B-Application
market	O
with	O
devices	O
such	O
as	O
the	O
Desire	B-Application
816	I-Application
.	O
</s>
<s>
Details	O
about	O
a	O
possible	O
HTC	B-Application
One	I-Application
successor	O
,	O
codenamed	O
"	O
M8	O
"	O
,	O
first	O
leaked	O
in	O
November	O
2013	O
.	O
</s>
<s>
Photos	O
posted	O
by	O
a	O
user	O
of	O
the	O
Chinese	O
forum	O
Baidu	B-Language
Tieba	I-Language
revealed	O
a	O
unibody	O
chassis	O
part	O
that	O
also	O
covered	O
the	O
edges	O
of	O
the	O
device	O
(	O
removing	O
the	O
need	O
for	O
injection	O
molding	O
)	O
,	O
and	O
a	O
second	O
hole	O
above	O
the	O
camera	O
on	O
the	O
rear	O
of	O
the	O
device	O
—	O
speculated	O
to	O
be	O
either	O
a	O
fingerprint	O
reader	O
or	O
a	O
second	O
camera	O
.	O
</s>
<s>
In	O
December	O
2013	O
,	O
the	O
HTC	B-Application
One	I-Application
Mini	I-Application
was	O
banned	O
from	O
sale	O
in	O
the	O
United	O
Kingdom	O
as	O
the	O
result	O
of	O
a	O
patent	O
infringement	O
lawsuit	O
by	O
Nokia	O
.	O
</s>
<s>
While	O
the	O
then-current	O
HTC	B-Application
One	I-Application
was	O
also	O
affected	O
by	O
the	O
ruling	O
,	O
its	O
sales	O
ban	O
was	O
stayed	O
by	O
the	O
court	O
pending	O
an	O
appeal	O
,	O
since	O
the	O
judge	O
indicated	O
that	O
banning	O
HTC	B-Application
One	I-Application
sales	O
would	O
have	O
a	O
negative	O
effect	O
on	O
the	O
company	O
as	O
it	O
prepared	O
a	O
new	O
model	O
,	O
which	O
was	O
assumed	O
to	O
have	O
not	O
infringed	O
the	O
patents	O
,	O
for	O
release	O
in	O
either	O
February	O
or	O
March	O
2014	O
.	O
</s>
<s>
In	O
January	O
2014	O
,	O
Bloomberg	O
News	O
reported	O
that	O
the	O
device	O
would	O
carry	O
a	O
similar	O
design	O
to	O
the	O
previous	O
model	O
,	O
but	O
with	O
a	O
larger	O
screen	O
of	O
at	O
least	O
5	O
inches	O
in	O
size	O
,	O
and	O
that	O
the	O
phone	O
would	O
feature	O
two	O
cameras	O
sensors	B-Algorithm
to	O
provide	O
better	O
focus	O
,	O
depth	O
of	O
field	O
and	O
image	O
quality	O
.	O
</s>
<s>
The	O
first	O
,	O
by	O
a	O
Russian	O
website	O
on	O
Twitter	B-Application
,	O
revealed	O
the	O
rear	O
of	O
the	O
device	O
and	O
confirming	O
early	O
reports	O
about	O
its	O
design	O
and	O
dual-camera	O
layout	O
,	O
with	O
a	O
dual-tone	O
flash	B-Device
.	O
</s>
<s>
Another	O
leak	O
by	O
evleaks	O
revealed	O
an	O
updated	O
version	O
of	O
HTC	B-Application
Sense	I-Application
,	O
retaining	O
the	O
BlinkFeed	O
home	O
screen	O
,	O
and	O
depicting	O
on-screen	O
software	O
buttons	O
.	O
</s>
<s>
In	O
March	O
2014	O
,	O
a	O
major	O
leak	O
occurred	O
with	O
the	O
release	O
of	O
a	O
12-minute-long	O
hands-on	O
video	O
by	O
a	O
YouTube	B-General_Concept
user	O
,	O
detailing	O
the	O
device	O
's	O
HTC	B-Application
Sense	I-Application
6.0	O
software	O
and	O
its	O
inclusion	O
of	O
a	O
microSD	B-Device
card	O
slot	O
.	O
</s>
<s>
In	O
February	O
2014	O
,	O
HTC	B-Application
began	O
to	O
release	O
a	O
series	O
of	O
teaser	O
videos	O
promoting	O
a	O
launch	O
event	O
for	O
the	O
new	O
HTC	B-Application
One	I-Application
on	O
March	O
25	O
,	O
2014	O
.	O
</s>
<s>
The	O
new	O
device	O
,	O
officially	O
called	O
HTC	B-Application
One	I-Application
(	O
M8	O
)	O
or	O
the	O
new	O
HTC	B-Application
One	I-Application
,	O
was	O
unveiled	O
during	O
a	O
press	O
conference	O
on	O
March	O
24	O
,	O
2014	O
,	O
that	O
was	O
held	O
simultaneously	O
in	O
London	O
and	O
New	O
York	O
City	O
.	O
</s>
<s>
Verizon	B-Application
Wireless	I-Application
began	O
offering	O
the	O
device	O
at	O
selected	O
retail	O
outlets	O
immediately	O
after	O
the	O
event	O
.	O
</s>
<s>
The	O
overall	O
design	O
of	O
the	O
HTC	B-Application
One	I-Application
(	O
M8	O
)	O
closely	O
resembles	O
the	O
2013	O
model	O
,	O
the	O
HTC	B-Application
One	I-Application
(	O
M7	O
)	O
,	O
with	O
a	O
unibody	O
aluminum	O
frame	O
and	O
dual	O
front-facing	O
speakers	O
,	O
and	O
a	O
brushed	O
metal	O
backing	O
.	O
</s>
<s>
At	O
the	O
bottom	O
of	O
the	O
device	O
are	O
a	O
micro	O
USB	B-Protocol
2.0	I-Protocol
port	I-Protocol
supporting	O
Qualcomm	O
's	O
QuickCharge	O
2.0	O
technology	O
and	O
a	O
headphone	B-Device
jack	I-Device
.	O
</s>
<s>
The	O
previous	O
design	O
had	O
been	O
panned	O
by	O
critics	O
for	O
being	O
irregular	O
,	O
and	O
causing	O
a	O
black	O
bar	O
to	O
occur	O
on-screen	O
if	O
an	O
app	O
required	O
the	O
deprecated	O
"	O
Menu	O
"	O
key	O
in	O
violation	O
of	O
Android	B-Application
human	B-Application
interface	I-Application
guidelines	I-Application
.	O
</s>
<s>
The	O
hardware	O
of	O
the	O
device	O
was	O
upgraded	O
in	O
comparison	O
to	O
its	O
predecessor	O
,	O
using	O
a	O
2.3GHz	O
quad-core	O
Snapdragon	B-Architecture
801	O
with	O
2GB	O
of	O
RAM	O
,	O
and	O
a	O
5.0-inch	O
,	O
1080p	O
Super	B-Application
LCD	I-Application
3	O
touchscreen	O
display	O
with	O
a	O
pixel	B-Algorithm
density	I-Algorithm
of	O
441	O
ppi	B-Algorithm
,	O
protected	O
by	O
a	O
layer	O
of	O
Gorilla	O
Glass	O
3	O
with	O
a	O
scratch-resistance	O
coating	O
.	O
</s>
<s>
The	O
device	O
comes	O
with	O
either	O
16	O
or	O
32GB	O
of	O
internal	O
storage	O
,	O
and	O
also	O
includes	O
a	O
MicroSD	B-Device
slot	O
for	O
up	O
to	O
128GB	O
of	O
additional	O
storage	O
.	O
</s>
<s>
The	O
BoomSound	O
stereo	O
speakers	O
were	O
also	O
improved	O
with	O
deeper	O
enclosures	B-Device
,	O
a	O
larger	O
amplifier	O
,	O
and	O
an	O
updated	O
DSP	B-Architecture
for	O
improved	O
sound	O
quality	O
.	O
</s>
<s>
It	O
also	O
incorporates	O
a	O
sensor	B-General_Concept
hub	I-General_Concept
for	O
discrete	O
motion	O
tracking	O
.	O
</s>
<s>
The	O
main/primary	O
rear-mounted	O
camera	O
retains	O
the	O
"	O
UltraPixel	O
"	O
image	B-Algorithm
sensor	I-Algorithm
(	O
OmniVision	O
OV4688	O
)	O
composed	O
of	O
pixels	B-Algorithm
that	O
are	O
2.0µm	O
in	O
size	O
.	O
</s>
<s>
The	O
UltraPixel	O
sensor	O
was	O
updated	O
to	O
provide	O
better	O
color	O
accuracy	O
in	O
lit	O
photographs	O
,	O
and	O
the	O
device	O
now	O
includes	O
a	O
dual-tone	O
flash	B-Device
.	O
</s>
<s>
Similar	O
to	O
the	O
competing	O
Galaxy	B-Application
S5	I-Application
,	O
the	O
M8	O
's	O
main	O
rear	O
camera	O
has	O
an	O
image	B-Algorithm
sensor	I-Algorithm
with	O
a	O
wide	O
aspect	O
ratio	O
of	O
16:9	O
.	O
</s>
<s>
Its	O
resolution	O
is	O
2688×1520	O
pixels	B-Algorithm
,	O
approximately	O
four	O
megapixels	O
,	O
and	O
it	O
uses	O
an	O
aperture	O
of	O
2.0	O
.	O
</s>
<s>
However	O
,	O
unlike	O
the	O
competing	O
Galaxy	B-Application
S5	I-Application
,	O
Xperia	B-Application
Z2	I-Application
and	O
LG	B-Application
G3	I-Application
,	O
the	O
HTC	B-Application
One	I-Application
M8	I-Application
lacks	O
2160p	O
4K	O
video	O
recording	O
(	O
~	O
8.3	O
Megapixels	O
per	O
video	O
frame	O
)	O
due	O
to	O
the	O
insufficient	O
resolution	O
of	O
the	O
image	B-Algorithm
sensor	I-Algorithm
.	O
</s>
<s>
The	O
depth	O
map	O
,	O
along	O
with	O
other	O
information	O
,	O
can	O
then	O
be	O
used	O
to	O
generate	O
3D	O
parallax	B-Device
effects	O
,	O
to	O
apply	O
filters	O
individually	O
to	O
different	O
parts	O
of	O
the	O
image	O
,	O
such	O
as	O
blurring	O
the	O
background	O
to	O
focus	O
on	O
an	O
object	O
in	O
the	O
foreground	O
(	O
branded	O
"	O
UFocus	O
"	O
)	O
,	O
or	O
to	O
copy	O
and	O
paste	O
an	O
object	O
from	O
one	O
photo	O
into	O
another	O
,	O
similar	O
to	O
those	O
available	O
with	O
a	O
Lytro	O
camera	O
.	O
</s>
<s>
In	O
mid-April	O
,	O
HTC	B-Application
released	O
a	O
software	B-Application
development	I-Application
kit	I-Application
that	O
allows	O
other	O
apps	O
to	O
take	O
advantage	O
of	O
the	O
depth	O
mapping	O
system	O
and	O
stated	O
that	O
the	O
SDK	B-Application
will	O
be	O
used	O
by	O
the	O
camera	O
app	O
on	O
the	O
Google	B-Application
Play	I-Application
edition	I-Application
.	O
</s>
<s>
HTC	B-Application
CEO	O
Peter	O
Chou	O
said	O
that	O
the	O
work	O
on	O
the	O
Duo	O
Camera	O
took	O
18	O
months	O
,	O
in	O
close	O
collaboration	O
with	O
Qualcomm	O
whose	O
Snapdragon	B-Architecture
801	O
ISPs	O
were	O
boosted	O
to	O
handle	O
the	O
device	O
's	O
imaging	O
needs	O
.	O
</s>
<s>
The	O
secondary/front	O
camera	O
for	O
selfies	O
that	O
is	O
using	O
a	O
Samsung	B-Architecture
S5K5E2	I-Architecture
image	B-Algorithm
sensor	I-Algorithm
has	O
a	O
higher	O
megapixel	O
count	O
than	O
the	O
primary/rear	O
camera	O
.	O
</s>
<s>
The	O
device	O
ships	O
with	O
a	O
customized	O
version	O
of	O
Android	B-Application
4.4.2	I-Application
"	O
KitKat	B-Application
"	O
,	O
utilizing	O
version	O
6.0	O
of	O
the	O
HTC	B-Application
Sense	I-Application
software	O
suite	O
.	O
</s>
<s>
It	O
builds	O
upon	O
the	O
design	O
of	O
Sense	B-Application
5	O
with	O
a	O
more	O
minimal	O
design	O
,	O
color	O
themes	O
,	O
and	O
optimizations	O
for	O
larger	O
screens	O
and	O
Android	B-Application
4.4	I-Application
'	O
s	O
transparency	O
features	O
.	O
</s>
<s>
An	O
"	O
extreme	O
power	O
saving	O
mode	O
"	O
was	O
also	O
added	O
,	O
which	O
caps	O
CPU	O
usage	O
and	O
disables	O
non-essential	O
applications	O
,	O
services	O
,	O
and	O
sensors	B-Algorithm
to	O
conserve	O
battery	O
life	O
when	O
running	O
low	O
;	O
the	O
mode	O
only	O
allows	O
access	O
to	O
the	O
phone	O
,	O
messaging	O
,	O
e-mail	O
,	O
calendar	O
,	O
and	O
calculator	O
apps	O
,	O
and	O
disables	O
multitasking	O
.	O
</s>
<s>
BlinkFeed	O
was	O
updated	O
with	O
a	O
revised	O
design	O
,	O
which	O
only	O
now	O
displays	O
the	O
weather	O
clock	O
if	O
it	O
's	O
set	O
as	O
the	O
default	O
home	O
screen	O
,	O
and	O
will	O
also	O
now	O
allow	O
third-party	O
developers	O
to	O
add	O
content	O
sources	O
through	O
an	O
SDK	B-Application
;	O
Fitbit	B-Application
(	O
whose	O
app	O
,	O
also	O
pre-loaded	O
on	O
the	O
device	O
,	O
can	O
integrate	O
with	O
its	O
sensor	B-General_Concept
hub	I-General_Concept
as	O
a	O
pedometer	O
)	O
and	O
Foursquare	B-Application
were	O
announced	O
as	O
the	O
launch	O
partners	O
for	O
the	O
SDK	B-Application
.	O
</s>
<s>
The	O
HTC	B-Application
Share	O
functionality	O
has	O
been	O
replaced	O
by	O
a	O
dedicated	O
Zoe	O
app	O
,	O
which	O
allows	O
users	O
to	O
collaborate	O
on	O
highlight	O
reels	O
.	O
</s>
<s>
The	O
TV	O
app	O
was	O
updated	O
to	O
include	O
live	O
sports	O
statistics	O
and	O
"	O
Fan	O
Talk	O
"	O
,	O
which	O
allows	O
users	O
to	O
track	O
and	O
join	O
conversations	O
relating	O
to	O
TV	O
programs	O
on	O
Twitter	B-Application
.	O
</s>
<s>
HTC	B-Application
has	O
committed	O
to	O
providing	O
firmware	O
updates	O
for	O
at	O
least	O
two	O
years	O
following	O
its	O
release	O
.	O
</s>
<s>
The	O
BlinkFeed	O
,	O
Gallery	O
,	O
TV	O
,	O
and	O
Zoe	O
apps	O
,	O
along	O
with	O
a	O
"	O
HTC	B-Application
Service	O
Pack	O
"	O
,	O
are	O
packaged	O
as	O
apps	O
on	O
Google	B-Application
Play	I-Application
Store	I-Application
,	O
allowing	O
them	O
to	O
be	O
updated	O
independently	O
from	O
the	O
firmware	O
itself	O
.	O
</s>
<s>
An	O
update	O
to	O
Android	B-Application
4.4.3	I-Application
was	O
released	O
in	O
July	O
2014	O
.	O
</s>
<s>
In	O
October	O
2014	O
,	O
an	O
update	O
to	O
4.4.4	O
was	O
released	O
,	O
adding	O
a	O
suite	O
of	O
enhanced	O
camera	O
features	O
branded	O
as	O
"	O
HTC	B-Application
Eye	O
Experience	O
"	O
;	O
this	O
includes	O
"	O
Split	O
Capture	O
"	O
,	O
"	O
Photo	O
Booth	O
"	O
,	O
and	O
"	O
Auto	O
Selfie	O
"	O
modes	O
,	O
voice	O
shutter	O
,	O
face	O
tracking	O
while	O
recording	O
video	O
,	O
and	O
the	O
"	O
Live	O
Makeup	O
"	O
filter	O
.	O
</s>
<s>
An	O
update	O
to	O
Android	B-Application
5.0	I-Application
"	I-Application
Lollipop	I-Application
"	I-Application
was	O
first	O
released	O
for	O
unlocked	O
models	O
in	O
January	O
2015	O
.	O
</s>
<s>
The	O
Android	B-Application
5	I-Application
update	O
introduces	O
the	O
issues	O
of	O
freezing	O
,	O
forced	O
reboots	O
,	O
decrease	O
in	O
frame	O
rates	O
and	O
lag	O
when	O
using	O
the	O
smartphone	B-Application
for	O
heavy	O
gaming	O
.	O
</s>
<s>
T	O
's	O
HTC	B-Application
One	I-Application
M8	I-Application
model	O
received	O
the	O
Android	B-Application
5.0	I-Application
Lollipop	I-Application
OTA	O
update	O
in	O
April	O
2015	O
.	O
</s>
<s>
Unlocked	O
models	O
were	O
upgraded	O
to	O
Android	B-Application
6.0	I-Application
"	I-Application
Marshmallow	I-Application
"	I-Application
in	O
December	O
2015	O
.	O
</s>
<s>
HTC	B-Application
unveiled	O
a	O
"	O
Dot	O
View	O
Case	O
"	O
for	O
the	O
device	O
during	O
its	O
press	O
conference	O
.	O
</s>
<s>
The	O
cover	O
of	O
this	O
flip	O
case	O
contains	O
a	O
grid	O
of	O
holes	O
,	O
allowing	O
a	O
clock	O
,	O
weather	O
forecast	O
,	O
and	O
notifications	O
of	O
messages	O
and	O
calls	O
on	O
the	O
screen	O
below	O
it	O
to	O
be	O
displayed	O
through	O
the	O
holes	O
in	O
a	O
style	O
resembling	O
a	O
dot	B-General_Concept
matrix	I-General_Concept
display	O
.	O
</s>
<s>
A	O
Google	B-Application
Play	I-Application
edition	I-Application
(	O
GPE	O
)	O
of	O
the	O
device	O
was	O
also	O
released	O
.	O
</s>
<s>
While	O
it	O
otherwise	O
runs	O
stock	O
Android	B-Application
without	O
HTC	B-Application
Sense	I-Application
,	O
it	O
still	O
contains	O
HTC	B-Application
software	O
to	O
support	O
certain	O
features	O
,	O
such	O
as	O
an	O
"	O
HTC	B-Application
Photo	O
Edit	O
"	O
app	O
for	O
use	O
with	O
the	O
Duo	O
Camera	O
,	O
and	O
Motion	O
Launch	O
,	O
and	O
selected	O
HTC	B-Application
Sense	I-Application
apps	O
can	O
be	O
downloaded	O
through	O
Google	B-Application
Play	I-Application
.	O
</s>
<s>
Google	O
discontinued	O
its	O
GPE	O
devices	O
in	O
January	O
2015	O
when	O
the	O
Google	B-Application
Play	I-Application
Edition	I-Application
M8	O
,	O
the	O
last	O
remaining	O
GPE	O
device	O
available	O
on	O
its	O
online	O
store	O
,	O
was	O
removed	O
from	O
sale	O
.	O
</s>
<s>
HTC	B-Application
released	O
a	O
special	O
Harman	O
Kardon	O
Edition	O
model	O
of	O
the	O
smartphone	B-Application
featuring	O
an	O
upgraded	O
Harman	O
Kardon	O
audio	O
system	O
,	O
a	O
dark	O
grey	O
finish	O
with	O
gold	O
accents	O
,	O
and	O
a	O
pair	O
of	O
Harman	O
Kardon	O
AE-S	O
earbuds	O
on	O
April	O
29	O
,	O
2014	O
,	O
exclusively	O
via	O
Sprint	O
in	O
the	O
United	O
States	O
.	O
</s>
<s>
On	O
July	O
2	O
,	O
2014	O
,	O
HTC	B-Application
Germany	O
announced	O
a	O
Dual	O
SIM	O
variant	O
via	O
a	O
press	O
release	O
.	O
</s>
<s>
The	O
phone	O
was	O
made	O
available	O
in	O
Germany	O
,	O
Austria	O
and	O
Switzerland	O
in	O
calendar	O
week	O
28	O
of	O
that	O
year	O
for	O
a	O
price	O
of	O
€679	O
(	O
799CHF	O
)	O
which	O
at	O
that	O
time	O
was	O
slightly	O
higher	O
than	O
the	O
MSRP	B-Protocol
of	O
€649	O
for	O
the	O
single	O
SIM	O
version	O
but	O
some	O
€100	O
higher	O
than	O
typical	O
retail	O
prices	O
which	O
had	O
already	O
begun	O
to	O
drop	O
for	O
the	O
regular	O
model	O
.	O
</s>
<s>
Both	O
SIM-slots	O
are	O
of	O
nano-size	O
and	O
the	O
device	O
retains	O
the	O
additional	O
microSD-slot	O
.	O
</s>
<s>
While	O
being	O
delivered	O
with	O
Android	B-Application
KitKat	I-Application
the	O
device	O
received	O
an	O
over-the-air-update	O
to	O
Lollipop	B-Application
(	O
5.0.2	O
)	O
in	O
May	O
2015	O
,	O
a	O
considerable	O
amount	O
of	O
time	O
later	O
than	O
other	O
variants	O
.	O
</s>
<s>
On	O
August	O
18	O
,	O
2014	O
,	O
HTC	B-Application
and	O
Verizon	B-Application
Wireless	I-Application
announced	O
a	O
new	O
variant	O
of	O
the	O
device	O
known	O
as	O
the	O
HTC	B-Application
One	I-Application
(	O
M8	O
)	O
for	O
Windows	B-Protocol
,	O
which	O
runs	O
Windows	B-Protocol
Phone	I-Protocol
8.1	I-Protocol
Update	I-Protocol
1	I-Protocol
instead	O
of	O
Android	B-Application
,	O
marking	O
HTC	B-Application
's	O
first	O
Windows	B-Protocol
Phone	I-Protocol
device	O
since	O
2013	O
's	O
HTC	B-Application
Windows	B-Protocol
Phone	I-Protocol
8XT	O
.	O
</s>
<s>
Its	O
hardware	O
is	O
nearly	O
identical	O
to	O
the	O
Android	B-Application
version	O
,	O
aside	O
from	O
minor	O
differences	O
such	O
as	O
colors	O
(	O
it	O
is	O
only	O
available	O
in	O
dark	O
grey	O
)	O
and	O
branding	O
.	O
</s>
<s>
The	O
device	O
ships	O
with	O
several	O
HTC-developed	O
apps	O
to	O
provide	O
Sense	B-Application
features	O
on	O
top	O
of	O
Windows	B-Protocol
Phone	I-Protocol
,	O
such	O
as	O
ports	O
of	O
BlinkFeed	O
,	O
Sense	B-Application
TV	O
,	O
and	O
Video	O
Highlights	O
,	O
an	O
HTC	B-Application
Camera	O
app	O
for	O
using	O
the	O
Duo	O
Camera	O
and	O
its	O
depth	O
mapping	O
effects	O
,	O
and	O
support	O
for	O
the	O
Dot	O
View	O
Case	O
and	O
double-tapping	O
the	O
screen	O
to	O
wake	O
it	O
up	O
.	O
</s>
<s>
The	O
development	O
of	O
the	O
device	O
for	O
Windows	B-Protocol
was	O
enabled	O
by	O
changes	O
to	O
the	O
Windows	B-Protocol
Phone	I-Protocol
platform	O
by	O
Microsoft	O
to	O
allow	O
for	O
more	O
flexibility	O
and	O
variance	O
in	O
hardware	O
designs	O
,	O
such	O
as	O
support	O
for	O
on-screen	O
buttons	O
.	O
</s>
<s>
These	O
changes	O
made	O
it	O
theoretically	O
possible	O
for	O
OEMs	O
to	O
re-use	O
hardware	O
designs	O
from	O
Android	B-Application
devices	O
for	O
use	O
as	O
part	O
of	O
a	O
Windows	B-Protocol
Phone	I-Protocol
device	O
.	O
</s>
<s>
HTC	B-Application
Americas	O
president	O
Jason	O
Mackenzie	O
argued	O
that	O
with	O
the	O
device	O
for	O
Windows	B-Protocol
,	O
HTC	B-Application
was	O
the	O
first	O
smartphone	B-Application
maker	O
to	O
"[launch]	O
an	O
iconic	O
device	O
on	O
multiple	O
operating	O
systems	O
without	O
making	O
any	O
compromises.	O
"	O
</s>
<s>
The	O
device	O
is	O
compatible	O
with	O
the	O
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
Insider	B-Application
Preview	I-Application
but	O
not	O
with	O
the	O
final	O
public	O
release	O
version	O
of	O
the	O
OS	O
.	O
</s>
<s>
HTC	B-Application
unveiled	O
the	O
One	O
(	O
M8	O
)	O
Eye	O
in	O
October	O
2014	O
.	O
</s>
<s>
The	O
Android	B-Application
version	O
of	O
the	O
HTC	B-Application
One	I-Application
(	O
M8	O
)	O
received	O
mostly	O
positive	O
reviews	O
from	O
critics	O
.	O
</s>
<s>
David	O
Pierce	O
of	O
The	O
Verge	O
described	O
the	O
design	O
as	O
"[a]	O
wonderfully	O
rare	O
mix	O
between	O
the	O
beauty	O
of	O
the	O
old	O
One	O
and	O
the	O
unabashed	O
utility	O
of	O
a	O
phone	O
like	O
the	O
Galaxy	B-Application
S4	I-Application
.	O
</s>
<s>
TechRadar	O
suggested	O
that	O
the	O
HTC	B-Application
One	I-Application
(	O
M8	O
)	O
'	O
s	O
design	O
aged	O
well	O
against	O
upcoming	O
metal	O
smartphones	B-Application
,	O
being	O
sufficient	O
to	O
"	O
survive	O
the	O
onslaught	O
of	O
the	O
iPhone	B-Operating_System
6	I-Operating_System
and	O
the	O
Galaxy	B-Application
S6	I-Application
"	O
.	O
</s>
<s>
Some	O
reviewers	O
panned	O
the	O
increased	O
height	O
of	O
the	O
device	O
and	O
thick	O
bezels	O
compared	O
to	O
the	O
preceding	O
HTC	B-Application
One	I-Application
(	O
M7	O
)	O
and	O
other	O
competing	O
smartphones	B-Application
;	O
in	O
particular	O
Ars	O
Technica	O
criticized	O
HTC	B-Application
for	O
not	O
using	O
its	O
shift	O
towards	O
software	O
buttons	O
to	O
reduce	O
the	O
size	O
of	O
the	O
device	O
's	O
bezel	O
,	O
noting	O
that	O
they	O
did	O
not	O
remove	O
the	O
black	O
strip	O
below	O
the	O
screen	O
where	O
the	O
previous	O
,	O
physical	O
buttons	O
were	O
.	O
</s>
<s>
While	O
it	O
received	O
praise	O
for	O
its	O
low-light	O
capabilities	O
,	O
faster	O
autofocus	O
,	O
along	O
with	O
the	O
updates	O
to	O
HTC	B-Application
's	O
camera	O
software	O
,	O
the	O
camera	O
was	O
criticized	O
for	O
not	O
showing	O
any	O
notable	O
improvements	O
in	O
image	O
quality	O
over	O
the	O
previous	O
model	O
,	O
producing	O
soft-looking	O
images	O
that	O
only	O
looked	O
acceptable	O
at	O
small	O
sizes	O
due	O
to	O
aggressive	O
noise-reduction	O
and	O
inadequate	O
software	O
processing	O
.	O
</s>
<s>
However	O
,	O
Engadget	O
praised	O
HTC	B-Application
's	O
focus	O
on	O
"	O
selfies	O
"	O
with	O
its	O
5-megapixel	O
front-facing	O
camera	O
,	O
and	O
The	O
Verge	O
quipped	O
that	O
even	O
its	O
"	O
ultimate	O
selfie	O
machine	O
"	O
took	O
better	O
photos	O
than	O
the	O
rear-facing	O
camera	O
in	O
many	O
situations	O
.	O
</s>
<s>
Ars	O
Technica	O
specifically	O
considered	O
the	O
Duo	O
Camera	O
to	O
be	O
"	O
poorly	O
executed	O
gimmicks	O
"	O
,	O
noting	O
that	O
the	O
effect	O
could	O
be	O
replicated	O
in	O
software	O
and	O
that	O
HTC	B-Application
should	O
have	O
instead	O
focused	O
on	O
improving	O
the	O
hardware	O
of	O
the	O
rear	O
camera	O
.	O
</s>
<s>
Anand	O
Lal	O
Shimpi	O
of	O
AnandTech	O
praised	O
the	O
look	O
and	O
feel	O
of	O
the	O
device	O
,	O
Sense	B-Application
6.0	O
,	O
and	O
the	O
better	O
power	O
efficiency	O
with	O
the	O
Snapdragon	B-Architecture
801	O
.	O
</s>
<s>
Ultimately	O
,	O
he	O
stated	O
that	O
the	O
new	O
HTC	B-Application
One	I-Application
"	O
is	O
an	O
upgrade	O
in	O
so	O
many	O
areas	O
,	O
but	O
lacked	O
a	O
substantial	O
step	O
forward	O
in	O
primary	O
camera	O
quality.	O
"	O
</s>
