<s>
Lenovo	B-Application
IdeaPhone	I-Application
A820	I-Application
is	O
a	O
dual-SIM	O
,	O
quad-core	O
MediaTek	B-Architecture
MT6589	O
based	O
smartphone	B-Application
belonging	O
to	O
the	O
A	O
series	O
which	O
is	O
an	O
entry-level	O
group	O
of	O
Lenovo	B-Application
mobile	I-Application
communication	I-Application
products	I-Application
.	O
</s>
<s>
The	O
phone	O
supports	O
900MHz	O
,	O
1800MHz	O
,	O
1900MHz	O
GSM	O
bands	O
as	O
well	O
as	O
900MHz	O
and	O
2100MHz	O
UMTS	B-Protocol
frequencies	O
using	O
GRPS	O
,	O
EDGE	O
,	O
HSDPA	O
,	O
HSUPA	O
,	O
HSPA	O
and	O
HSPA+	O
technology	O
.	O
</s>
<s>
The	O
CPU	O
is	O
Mediatek	B-Architecture
MT6589	O
1.2GHz	O
quad-core	O
processor	O
.	O
</s>
<s>
It	O
has	O
4.5	O
inch	O
IPS	B-Architecture
screen	I-Architecture
with	O
a	O
qHD	O
resolution	O
of	O
540x960	O
px	B-Algorithm
displaying	O
up	O
to	O
16M	O
colors	O
and	O
covered	O
with	O
a	O
multitouch	O
(	O
up	O
to	O
5	O
touch	O
points	O
)	O
panel	O
.	O
</s>
<s>
Graphics	O
is	O
run	O
by	O
an	O
incorporated	O
Imagination	O
PowerVR	B-Device
SGX544	O
GPU	O
.	O
</s>
<s>
Additionally	O
,	O
the	O
smartphone	B-Application
supports	O
external	O
microSD/microSDHC	O
card	O
of	O
a	O
capacity	O
up	O
to	O
32	O
GiB	O
.	O
</s>
<s>
Stock	O
A820	O
is	O
running	O
Android	B-Application
4.1.2	O
Jelly	O
Bean	O
operating	O
system	O
,	O
although	O
unofficial	O
alternative	O
ROMs	O
exist	O
using	O
various	O
Android	B-Application
OS	I-Application
versions	O
.	O
</s>
