<s>
The	O
Nokia	B-Device
Lumia	I-Device
820	I-Device
is	O
a	O
smartphone	B-Application
designed	O
,	O
developed	O
and	O
marketed	O
by	O
Nokia	O
.	O
</s>
<s>
It	O
is	O
the	O
successor	O
to	O
the	O
Lumia	B-Application
800	I-Application
and	O
is	O
one	O
of	O
the	O
first	O
Nokia	O
phones	O
to	O
implement	O
Windows	O
Phone	O
8	O
alongside	O
the	O
Nokia	B-Device
Lumia	I-Device
920	I-Device
.	O
</s>
<s>
Although	O
sharing	O
a	O
similar	O
appearance	O
with	O
the	O
Lumia	B-Application
800	I-Application
,	O
the	O
Lumia	B-Device
820	I-Device
is	O
a	O
major	O
overhaul	O
over	O
its	O
predecessor	O
,	O
sporting	O
a	O
diagonal	O
OLED	B-Device
display	I-Device
with	O
scratch	O
resistant	O
glass	O
,	O
though	O
lacking	O
Gorilla	O
Glass	O
protection	O
,	O
1.5GHz	O
dual-core	O
processor	O
,	O
and	O
an	O
8.7-megapixel	O
camera	O
.	O
</s>
<s>
The	O
820	O
is	O
the	O
first	O
Nokia	O
Windows	O
Phone	O
OS	O
based	O
smartphone	B-Application
to	O
embed	O
a	O
microSD	O
card	O
slot	O
.	O
</s>
<s>
On	O
October	O
9	O
,	O
2012	O
,	O
the	O
largely	O
similar	O
Nokia	B-Application
Lumia	I-Application
810	I-Application
was	O
presented	O
.	O
</s>
<s>
The	O
Lumia	B-Application
810	I-Application
is	O
exclusively	O
made	O
available	O
to	O
T-Mobile	O
customers	O
in	O
the	O
United	O
States	O
,	O
and	O
as	O
such	O
does	O
not	O
support	O
LTE	O
but	O
only	O
HSPA+	O
,	O
as	O
LTE	O
was	O
not	O
supported	O
in	O
T-Mobile	O
'	O
s	O
US	O
network	O
at	O
the	O
time	O
of	O
release	O
.	O
</s>
<s>
On	O
October	O
29	O
,	O
2012	O
,	O
another	O
variant	O
of	O
the	O
Lumia	B-Device
820	I-Device
,	O
the	O
Nokia	B-Application
Lumia	I-Application
822	I-Application
was	O
announced	O
,	O
having	O
a	O
better	O
front	O
camera	O
,	O
larger	O
battery	O
and	O
double	O
the	O
storage	O
.	O
</s>
<s>
It	O
is	O
exclusively	O
available	O
for	O
Verizon	B-Application
customers	O
.	O
</s>
<s>
The	O
phone	O
features	O
a	O
range	O
of	O
back	O
'	O
Shells	O
 '	O
which	O
will	O
allow	O
users	O
to	O
customise	O
the	O
look	O
of	O
their	O
phone	O
as	O
well	O
as	O
adding	O
functionality	O
such	O
as	O
Wireless	B-Application
charging	I-Application
,	O
if	O
a	O
shell	O
with	O
that	O
capability	O
is	O
added	O
.	O
</s>
<s>
This	O
feature	O
gives	O
the	O
additional	O
benefit	O
of	O
allowing	O
a	O
scuffed	O
or	O
broken	O
shell	O
to	O
be	O
replaced	O
with	O
a	O
new	O
one	O
to	O
freshen	O
up	O
the	O
device	O
,	O
something	O
which	O
is	O
not	O
possible	O
on	O
some	O
competing	O
smartphones	B-Application
such	O
as	O
the	O
iPhone	O
or	O
unibody	O
Lumia	O
designs	O
such	O
as	O
the	O
900	O
and	O
920	O
.	O
</s>
<s>
Jeff	O
Parsons	O
from	O
Techradar	O
wrote	O
:	O
"	O
The	O
Nokia	B-Device
Lumia	I-Device
820	I-Device
sits	O
nicely	O
at	O
the	O
crossroads	O
between	O
value	O
and	O
power	O
.	O
</s>
<s>
While	O
it	O
does	O
n't	O
have	O
the	O
processor	O
,	O
camera	O
or	O
larger	O
screen	O
of	O
its	O
big	O
brother	O
the	O
Lumia	B-Device
920	I-Device
,	O
it	O
does	O
have	O
microSD	O
storage	O
,	O
removable	O
covers	O
and	O
a	O
more	O
attractive	O
price	O
tag.	O
"	O
</s>
