<s>
The	O
OnePlus	B-Application
X	I-Application
is	O
an	O
Android	B-Application
smartphone	B-Application
developed	O
by	O
OnePlus	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
29	O
October	O
2015	O
,	O
three	O
months	O
after	O
the	O
release	O
of	O
the	O
company	O
's	O
second	O
flagship	O
,	O
the	O
OnePlus	B-Application
2	I-Application
on	O
27	O
July	O
.	O
</s>
<s>
The	O
OnePlus	B-Application
X	I-Application
's	O
internals	O
are	O
similar	O
to	O
the	O
OnePlus	B-Application
One	I-Application
.	O
</s>
<s>
The	O
OnePlus	B-Application
X	I-Application
was	O
available	O
in	O
three	O
design	O
options	O
:	O
Onyx	O
(	O
black	O
)	O
,	O
Champagne	O
(	O
white	O
)	O
,	O
and	O
a	O
limited	O
edition	O
Ceramic	O
version	O
.	O
</s>
<s>
OnePlus	O
has	O
stated	O
that	O
the	O
Ceramic	O
OnePlus	B-Application
X	I-Application
will	O
only	O
be	O
released	O
in	O
Europe	O
with	O
a	O
limited	O
run	O
of	O
only	O
10,000	O
units	O
.	O
</s>
<s>
The	O
OnePlus	B-Application
X	I-Application
originally	O
required	O
an	O
invitation	O
to	O
be	O
purchased	O
,	O
but	O
as	O
of	O
28	O
January	O
2016	O
,	O
invitations	O
are	O
no	O
longer	O
necessary	O
to	O
purchase	O
the	O
device	O
.	O
</s>
<s>
A	O
China-only	O
variant	O
of	O
the	O
OnePlus	B-Application
X	I-Application
,	O
the	O
Oppo	O
A30	O
,	O
was	O
released	O
in	O
February	O
2016	O
,	O
four	O
months	O
after	O
the	O
OnePlus	B-Application
X	I-Application
's	O
release	O
.	O
</s>
<s>
Shortly	O
after	O
the	O
launch	O
of	O
the	O
OnePlus	B-Application
2	I-Application
,	O
OnePlus	O
co-founder	O
Carl	O
Pei	O
hinted	O
at	O
the	O
launch	O
of	O
a	O
new	O
device	O
at	O
the	O
end	O
of	O
2015	O
when	O
interviewed	O
at	O
one	O
of	O
the	O
popup	O
events	O
in	O
New	O
York	O
City	O
.	O
</s>
<s>
After	O
months	O
of	O
speculation	O
by	O
the	O
media	O
,	O
the	O
OnePlus	B-Application
X	I-Application
was	O
officially	O
unveiled	O
on	O
29	O
October	O
2015	O
.	O
</s>
<s>
The	O
Ceramic	O
version	O
of	O
the	O
phone	O
features	O
a	O
ceramic	O
back	O
baked	O
over	O
a	O
25-day	O
manufacturing	O
process	O
,	O
which	O
OnePlus	O
claims	O
was	O
the	O
first	O
of	O
its	O
kind	O
for	O
a	O
smartphone	B-Application
material	O
.	O
</s>
<s>
It	O
gives	O
new	O
OnePlus	B-Application
2	I-Application
and	O
OnePlus	B-Application
X	I-Application
users	O
coverage	O
from	O
device	O
breakage	O
,	O
liquid	O
damage	O
,	O
accidental	O
damage	O
,	O
and	O
vandalism	O
among	O
others	O
.	O
</s>
<s>
As	O
with	O
all	O
other	O
OnePlus	O
phones	O
released	O
thus	O
far	O
,	O
the	O
OnePlus	B-Application
X	I-Application
required	O
an	O
invitation	O
to	O
be	O
purchased	O
.	O
</s>
<s>
OnePlus	O
has	O
announced	O
open	O
sales	O
for	O
the	O
OnePlus	B-Application
X	I-Application
after	O
the	O
initial	O
month	O
of	O
sales	O
that	O
was	O
strictly	O
invitation	O
based	O
.	O
</s>
<s>
The	O
design	O
of	O
the	O
OnePlus	B-Application
X	I-Application
features	O
a	O
smooth	O
glass	O
back	O
with	O
textured	O
aluminium	O
bezels	O
which	O
provides	O
a	O
good	O
grip	O
on	O
the	O
frame	O
of	O
the	O
phone	O
.	O
</s>
<s>
Both	O
versions	O
of	O
the	O
phone	O
feature	O
a	O
dark	O
glass	O
back	O
reminiscent	O
of	O
the	O
glass	O
back	O
on	O
the	O
iPhone	B-Operating_System
4	I-Operating_System
.	O
</s>
<s>
The	O
phone	O
inherits	O
the	O
alert	O
slider	O
first	O
found	O
on	O
the	O
OnePlus	B-Application
2	I-Application
which	O
toggles	O
between	O
All	O
,	O
Priority	O
Only	O
and	O
No	O
notifications	O
.	O
</s>
<s>
Due	O
to	O
the	O
smaller	O
form	O
factor	O
of	O
the	O
phone	O
the	O
internal	O
battery	O
was	O
smaller	O
compared	O
to	O
the	O
OnePlus	B-Application
2	I-Application
,	O
coming	O
in	O
at	O
2,525	O
mAh	O
compared	O
to	O
the	O
latter	O
's	O
3,300	O
mAh	O
battery	O
.	O
</s>
<s>
The	O
lower	O
price	O
of	O
the	O
phone	O
also	O
meant	O
that	O
the	O
fingerprint	O
sensor	O
previously	O
present	O
on	O
the	O
OnePlus	B-Application
2	I-Application
has	O
been	O
omitted	O
along	O
with	O
other	O
features	O
like	O
optical	O
image	O
stabilization	O
and	O
swappable	O
back	O
covers	O
.	O
</s>
<s>
Oddly	O
,	O
the	O
USB-C	O
connector	O
of	O
the	O
OnePlus	B-Application
2	I-Application
has	O
not	O
been	O
carried	O
over	O
to	O
the	O
OnePlus	B-Application
X	I-Application
and	O
the	O
phone	O
uses	O
the	O
micro	O
USB	O
instead	O
of	O
the	O
newer	O
USB-C	O
connector	O
.	O
</s>
<s>
OnePlus	O
has	O
released	O
textured	O
back	O
covers	O
for	O
the	O
OnePlus	B-Application
X	I-Application
which	O
resemble	O
the	O
styles	O
of	O
the	O
swappable	O
StyleSwap	O
Covers	O
for	O
the	O
OnePlus	B-Application
2	I-Application
with	O
Bamboo	O
,	O
Rosewood	O
,	O
Black	O
Apricot	O
and	O
Kevlar	O
backs	O
.	O
</s>
<s>
With	O
a	O
5	O
"	O
AMOLED	B-Algorithm
1920	O
×	O
1080	O
Full	O
HD	O
resolution	O
screen	O
protected	O
by	O
Corning	O
Gorilla	O
Glass	O
,	O
the	O
OnePlus	B-Application
X	I-Application
was	O
a	O
departure	O
from	O
both	O
the	O
OnePlus	B-Application
One	I-Application
and	O
OnePlus	B-Application
2	I-Application
which	O
featured	O
a	O
larger	O
5.5	O
"	O
LCD	B-Device
panel	I-Device
with	O
the	O
same	O
resolution	O
.	O
</s>
<s>
Despite	O
the	O
smaller	O
form	O
factor	O
,	O
users	O
still	O
have	O
the	O
option	O
of	O
choosing	O
between	O
hardware	O
capacitive	O
buttons	O
or	O
on-screen	O
customisable	O
navigation	O
"	O
soft	B-General_Concept
keys	I-General_Concept
"	O
.	O
</s>
<s>
The	O
OnePlus	B-Application
X	I-Application
was	O
available	O
in	O
Onyx	O
and	O
Ceramic	O
versions	O
with	O
each	O
sporting	O
different	O
unique	O
backs	O
and	O
a	O
slightly	O
different	O
colour	O
.	O
</s>
<s>
Despite	O
being	O
a	O
design-centric	O
device	O
as	O
advertised	O
by	O
OnePlus	O
,	O
the	O
phone	O
packs	O
quite	O
a	O
punch	O
with	O
relatively	O
powerful	O
internal	O
specs	O
which	O
was	O
similar	O
to	O
last	O
generation	O
flagships	O
like	O
the	O
OnePlus	B-Application
One	I-Application
and	O
LG	B-Application
G3	I-Application
.	O
</s>
<s>
The	O
OnePlus	B-Application
X	I-Application
features	O
16GB	O
of	O
internal	O
storage	O
with	O
3GB	O
LPDDR3	O
RAM	B-Architecture
and	O
the	O
handset	O
was	O
powered	O
by	O
the	O
Qualcomm	O
Snapdragon	O
801	O
32-bit	O
quad-core	B-Architecture
chip	O
clocked	O
at	O
2.3	O
GHz	O
with	O
an	O
Adreno	B-General_Concept
330	I-General_Concept
graphics	B-Architecture
processor	I-Architecture
.	O
</s>
<s>
As	O
with	O
the	O
OnePlus	B-Application
2	I-Application
,	O
NFC	O
was	O
not	O
available	O
on	O
the	O
OnePlus	B-Application
X	I-Application
.	O
</s>
<s>
The	O
OnePlus	B-Application
X	I-Application
has	O
been	O
tested	O
on	O
the	O
AnTuTu	O
Benchmark	O
test	O
and	O
it	O
yields	O
a	O
score	O
of	O
45,000	O
+	O
points	O
,	O
on	O
par	O
with	O
similar	O
devices	O
powered	O
by	O
the	O
Snapdragon	O
801	O
quad	B-Architecture
core	I-Architecture
processor	O
.	O
</s>
<s>
Unlike	O
the	O
earlier	O
OnePlus	B-Application
2	I-Application
,	O
since	O
OnePlus	B-Application
X	I-Application
does	O
not	O
support	O
any	O
700MHz	O
LTE	B-Algorithm
frequency	I-Algorithm
bands	I-Algorithm
(	O
namely	O
,	O
LTE	B-Algorithm
Band	I-Algorithm
12	O
and	O
17	O
,	O
used	O
by	O
T-Mobile	O
US	O
and	O
AT&T	O
LTE	O
networks	O
,	O
respectively	O
)	O
,	O
rural	O
and	O
indoor	O
reception	O
may	O
be	O
poor	O
in	O
the	O
United	O
States	O
,	O
especially	O
in	O
the	O
case	O
of	O
T-Mobile	O
US	O
network	O
,	O
where	O
LTE	B-Algorithm
Band	I-Algorithm
12	O
was	O
the	O
only	O
sub-1GHz	O
coverage	O
option	O
.	O
</s>
<s>
OnePlus	B-Application
X	I-Application
was	O
also	O
released	O
in	O
White	O
(	O
Champagne	O
Edition	O
)	O
for	O
other	O
countries	O
like	O
India	O
,	O
after	O
keeping	O
it	O
exclusive	O
for	O
home	O
country	O
China	O
.	O
</s>
<s>
The	O
OnePlus	B-Application
X	I-Application
comes	O
preloaded	O
with	O
Oxygen	B-Application
OS	I-Application
version	O
2.1.2	O
,	O
OnePlus	O
's	O
build	O
of	O
Android	B-Application
5.1.1	I-Application
"	I-Application
Lollipop	I-Application
"	I-Application
.	O
</s>
<s>
On	O
4	O
August	O
2016	O
,	O
OnePlus	O
began	O
rolling	O
out	O
version	O
2.2.2	O
of	O
Oxygen	B-Application
OS	I-Application
for	O
OnePlus	B-Application
X	I-Application
.	O
</s>
<s>
The	O
update	O
brings	O
some	O
bug	O
fixes	O
along	O
with	O
changes	O
to	O
camera	O
UI	O
and	O
inclusion	O
of	O
Android	B-Application
's	O
July	O
security	O
patch	O
.	O
</s>
<s>
On	O
28	O
September	O
2016	O
,	O
OnePlus	O
started	O
rolling	O
out	O
version	O
2.2.3	O
of	O
Oxygen	B-Application
OS	I-Application
for	O
OnePlus	B-Application
X	I-Application
.	O
</s>
<s>
The	O
update	O
comes	O
with	O
Android	B-Application
's	O
September	O
security	O
patch	O
and	O
necessary	O
dependencies	O
for	O
Android	B-Application
Marshmallow	I-Application
upgrade	O
.	O
</s>
<s>
On	O
1	O
October	O
2016	O
,	O
OnePlus	O
started	O
rolling	O
out	O
version	O
3.1.3	O
of	O
Oxygen	B-Application
OS	I-Application
for	O
OnePlus	B-Application
X	I-Application
.	O
</s>
<s>
The	O
update	O
comes	O
with	O
Android	B-Application
Marshmallow	I-Application
upgrade	O
.	O
</s>
