<s>
XOS	B-Operating_System
is	O
an	O
Android-based	O
operating	O
system	O
developed	O
by	O
Hong	O
Kong	O
mobile	O
phone	O
manufacturer	O
Infinix	O
Mobile	O
,	O
a	O
subsidiary	O
of	O
Transsion	O
Holdings	O
,	O
exclusively	O
for	O
their	O
smartphones	O
.	O
</s>
<s>
XOS	B-Operating_System
allows	O
for	O
a	O
wide	O
range	O
of	O
user	O
customization	O
without	O
requiring	O
rooting	B-Application
the	O
mobile	O
device	O
.	O
</s>
<s>
It	O
was	O
first	O
introduced	O
as	O
XUI	O
in	O
2015	O
and	O
later	O
as	O
XOS	B-Operating_System
in	O
2016	O
.	O
</s>
<s>
XOS	B-Operating_System
comes	O
with	O
features	O
like	O
;	O
XTheme	O
,	O
Scan	O
to	O
Recharge	O
,	O
Split	O
Screen	O
and	O
XManager	O
.	O
</s>
<s>
In	O
2015	O
,	O
Infinix	O
Mobile	O
released	O
XUI	O
1.0	O
,	O
based	O
on	O
Android	B-Application
5.0	I-Application
"	I-Application
Lollipop	I-Application
"	I-Application
,	O
featuring	O
XContacts	O
,	O
XTheme	O
,	O
XCloud	O
and	O
XShare	O
.	O
</s>
<s>
In	O
July	O
2016	O
,	O
XOS	B-Operating_System
2.0	O
Chameleon	O
was	O
released	O
based	O
on	O
Android	B-Application
6.0	I-Application
"	I-Application
Marshmallow	I-Application
"	I-Application
,	O
launching	O
on	O
HOT	O
S	O
and	O
featuring	O
XLauncher	O
and	O
fingerprint	O
manager	O
.	O
</s>
<s>
An	O
upgraded	O
version	O
XOS	B-Operating_System
2.2	O
Chameleon	O
based	O
on	O
Android	B-Application
7.0	I-Application
"	I-Application
Nougat	I-Application
"	I-Application
was	O
later	O
launched	O
in	O
2017	O
on	O
Note	O
3	O
and	O
Smart	O
X5010	O
.	O
</s>
<s>
In	O
August	O
2017	O
,	O
XOS	B-Operating_System
3.0	O
Hummingbird	O
was	O
released	O
based	O
on	O
Android	B-Application
7.0	I-Application
as	O
also	O
seen	O
in	O
XOS	B-Operating_System
2.2	O
,	O
launching	O
on	O
Zero	O
5	O
,	O
it	O
later	O
launched	O
in	O
2018	O
on	O
Hot	O
S3	O
based	O
on	O
Android	B-Application
8.0	I-Application
"	I-Application
Oreo	I-Application
"	I-Application
.	O
</s>
<s>
An	O
upgraded	O
version	O
XOS	B-Operating_System
3.2	O
Hummingbird	O
based	O
on	O
Android	B-Application
8.1	I-Application
was	O
later	O
launched	O
on	O
Hot	O
6	O
.	O
</s>
<s>
In	O
May	O
2018	O
,	O
XOS	B-Operating_System
4.0	O
Honeybee	O
was	O
released	O
based	O
on	O
Android	B-Application
8.0	I-Application
,	O
launching	O
on	O
Hot	O
7	O
and	O
Zero	O
6	O
,	O
featuring	O
Smart	O
Screen	O
Split	O
,	O
Notch	O
Hiding	O
,	O
Scan	O
To	O
Recharge	O
,	O
Fingerprint	O
Call	O
Recording	O
and	O
Smart	O
Text	O
Classifier	O
.	O
</s>
<s>
An	O
upgraded	O
version	O
XOS	B-Operating_System
4.1	O
Honeybee	O
based	O
on	O
Android	B-Application
8.1	I-Application
was	O
later	O
launched	O
on	O
Hot	O
7	O
Pro	O
.	O
</s>
<s>
In	O
2019	O
,	O
XOS	B-Operating_System
5.0	O
Cheetah	O
was	O
released	O
based	O
on	O
Android	B-Application
9.0	I-Application
"	I-Application
Pie	I-Application
"	I-Application
,	O
launching	O
on	O
Hot	O
S4	O
and	O
Hot	O
8	O
,	O
featuring	O
Privacy	O
Protection	O
,	O
AI	O
Intelligence	O
,	O
Smart	O
Panel	O
,	O
Data	O
Switcher	O
and	O
Fingerprint	O
Reset	O
Password	O
.	O
</s>
<s>
In	O
December	O
2019	O
,	O
an	O
upgraded	O
version	O
XOS	B-Operating_System
5.5	O
Cheetah	O
based	O
on	O
Android	B-Application
9.0	I-Application
was	O
released	O
to	O
Hot	O
8	O
,	O
featuring	O
Game	O
Assistant	O
,	O
Social	O
Turbo	O
,	O
Smart	O
Screen	O
Lifting	O
and	O
Game	O
Anti-Interference	O
.	O
</s>
<s>
In	O
February	O
2020	O
,	O
XOS	B-Operating_System
6.0	O
Dolphin	O
was	O
released	O
based	O
on	O
Android	B-Application
10	I-Application
,	O
launching	O
on	O
S5	O
Pro	O
,	O
Note	O
7	O
.	O
</s>
