<s>
The	O
Xiaomi	B-Application
Redmi	I-Application
1S	I-Application
,	O
code-named	O
armani	O
HM	O
1S	O
,	O
is	O
a	O
smartphone	B-Application
released	O
in	O
May	O
2014	O
,	O
developed	O
by	O
the	O
Chinese	O
company	O
Xiaomi	O
Inc	O
.	O
</s>
<s>
It	O
is	O
a	O
part	O
of	O
the	O
Redmi	B-Application
series	O
of	O
smartphones	B-Application
,	O
and	O
succeeded	O
the	O
Redmi	B-Application
1	I-Application
.	O
</s>
<s>
Visually	O
similar	O
to	O
its	O
predecessor	O
,	O
it	O
comes	O
with	O
a	O
4.7-inch	O
screen	O
,	O
a	O
quad-core	O
1.6GHz	O
Cortex-A7	O
processor	O
and	O
runs	O
Android	B-Application
version	O
4.3	O
(	O
Jellybean	O
)	O
,	O
bundled	O
with	O
the	O
proprietary	O
MIUI	B-Protocol
v5	I-Protocol
user	O
interface	O
,	O
which	O
can	O
be	O
upgraded	O
to	O
MIUI	B-Protocol
v9	O
based	O
on	O
Android	B-Application
4.4.4	I-Application
KTU84P	I-Application
.	O
</s>
<s>
Noted	O
for	O
its	O
low	O
price	O
(	O
in	O
India	O
)	O
,	O
the	O
Redmi	B-Application
1S	I-Application
was	O
an	O
extremely	O
popular	O
and	O
a	O
demanded	O
smartphone	B-Application
.	O
</s>
<s>
Xiaomi	O
opted	O
to	O
sell	O
the	O
smartphone	B-Application
online	O
in	O
order	O
to	O
comply	O
with	O
their	O
minimal	O
capital	O
input	O
.	O
</s>
<s>
Flipkart	O
was	O
the	O
exclusive	O
retailer	O
of	O
Redmi	B-Application
1S	I-Application
in	O
India	O
.	O
</s>
<s>
The	O
company	O
discontinued	O
the	O
smartphone	B-Application
's	O
sale	O
in	O
India	O
in	O
favor	O
of	O
the	O
successors	O
Redmi	B-Application
2	I-Application
and	O
Redmi	B-Application
Note	O
.	O
</s>
<s>
The	O
Redmi	B-Application
1S	I-Application
offers	O
Android	B-Application
4.3	O
Jellybean	O
,	O
with	O
proprietary	O
MIUI	B-Protocol
v5	I-Protocol
custom	O
graphical	O
user	O
interface	O
pre-installed	O
by	O
the	O
manufacturer	O
,	O
and	O
can	O
be	O
upgraded	O
to	O
Android	B-Application
4.4.4	I-Application
(	O
Kitkat	B-Application
)	O
with	O
MIUI	B-Protocol
v9	O
via	O
OTA	O
.	O
</s>
<s>
The	O
Redmi	B-Application
1S	I-Application
comes	O
with	O
a	O
factory-unlocked	O
bootloader	B-Application
,	O
allowing	O
users	O
from	O
the	O
outset	O
to	O
further	O
develop	O
the	O
OS	O
and	O
"	O
root	O
"	O
the	O
device	O
,	O
or	O
gain	O
legitimate	O
privileged	O
control	O
in	O
Android	B-Application
's	O
subsystem	O
.	O
</s>
<s>
Software-development	O
community	O
XDA-Developers	O
was	O
among	O
the	O
first	O
to	O
release	O
a	O
and	O
kernel	B-Operating_System
for	O
the	O
phone	O
,	O
and	O
since	O
then	O
the	O
phone	O
can	O
unofficially	O
be	O
upgraded	O
to	O
newer	O
versions	O
of	O
the	O
Android	B-Application
OS	I-Application
family	O
and	O
other	O
aftermarket	O
versions	O
.	O
</s>
<s>
The	O
Redmi	B-Application
1S	I-Application
has	O
received	O
many	O
unofficial	O
operating	O
systems	O
such	O
as	O
:	O
LineageOS	B-Application
18.1	O
,	O
CyanogenMod	B-Application
and	O
Mokee	B-Application
OS	I-Application
.	O
</s>
<s>
Its	O
kernel	B-Operating_System
is	O
open	O
sourced	O
and	O
is	O
available	O
to	O
developers	O
for	O
modification	O
.	O
</s>
<s>
The	O
Redmi	B-Application
1S	I-Application
has	O
a	O
plastic	O
chassis	O
that	O
is	O
long	O
,	O
wide	O
,	O
and	O
thick	O
,	O
and	O
weighs	O
.	O
</s>
<s>
The	O
screen	O
is	O
a	O
4.7-inch	O
IPS	B-Architecture
LCD	I-Architecture
capacitive	B-Device
touchscreen	B-Device
,	O
supporting	O
16-million	O
colors	O
at	O
a	O
resolution	O
of	O
1280	O
x	O
720	O
pixels	O
,	O
equating	O
to	O
around	O
312	O
pixel-per-inch	O
density	O
.	O
</s>
<s>
The	O
device	O
features	O
a	O
Qualcomm	O
Snapdragon	O
MSM8228	O
which	O
comprises	O
1.6GHz	O
Cortex-A7	O
quad-core	O
central	O
processing	O
unit	O
(	O
CPU	O
)	O
and	O
an	O
Adreno	O
305	O
graphics	O
processing	O
unit	O
(	O
GPU	O
)	O
,	O
in	O
conjunction	O
with	O
an	O
accelerometer	O
,	O
gyroscope	O
,	O
compass	B-Language
and	O
a	O
proximity	B-Device
sensor	I-Device
.	O
</s>
<s>
The	O
device	O
is	O
also	O
equipped	O
with	O
1	O
GB	O
RAM	B-Architecture
and	O
8	O
GB	O
internal	O
storage	O
,	O
supporting	O
microSD	B-Device
expansion	O
up	O
to	O
64	O
GB	O
.	O
</s>
<s>
The	O
rear	O
of	O
the	O
smartphone	B-Application
features	O
a	O
plain	O
plastic	O
surface	O
with	O
a	O
brushed	O
metal	O
Xiaomi	O
logo	O
at	O
the	O
center-bottom	O
of	O
the	O
rear	O
cover	O
.	O
</s>
<s>
The	O
smartphone	B-Application
is	O
shipped	O
with	O
a	O
2,000	O
mA	O
AC	O
power	O
charger	O
,	O
for	O
charging	O
its	O
2000	O
–	O
2,050	O
mAh( 	O
min/typ	O
)	O
battery	O
.	O
</s>
<s>
Redmi	B-Application
2	I-Application
smartphone	B-Application
,	O
developed	O
and	O
produced	O
by	O
Xiaomi	O
,	O
was	O
released	O
after	O
Xiaomi	O
discontinued	O
its	O
predecessor	O
Redmi	B-Application
1S	I-Application
.	O
</s>
