<s>
The	O
HTC	B-Application
7	I-Application
Surround	I-Application
(	O
also	O
known	O
as	O
the	O
HTC	B-Application
Surround	I-Application
and	O
HTC	O
T8788	O
)	O
is	O
a	O
smartphone	B-Application
created	O
by	O
HTC	O
running	O
on	O
the	O
Windows	B-Protocol
Phone	I-Protocol
7	O
operating	O
system	O
.	O
</s>
<s>
The	O
HTC	B-Application
Surround	I-Application
launched	O
on	O
November	O
8	O
,	O
2010	O
on	O
AT&T	O
.	O
</s>
<s>
The	O
HTC	B-Application
Surround	I-Application
,	O
like	O
its	O
European	O
cousin	O
,	O
the	O
HTC	B-Application
Mozart	I-Application
,	O
was	O
one	O
of	O
the	O
first	O
phones	O
to	O
use	O
the	O
Windows	B-Protocol
Phone	I-Protocol
7	O
OS	O
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
Nexus	B-Application
One	I-Application
.	O
</s>
<s>
The	O
HTC	B-Application
Surround	I-Application
uses	O
a	O
modest	O
3.8inch	O
WVGA	O
LCD	O
touchscreen	B-Device
with	O
a	O
resolution	O
of	O
480	O
x	O
800	O
pixels	O
.	O
</s>
<s>
The	O
display	O
is	O
designed	O
to	O
be	O
used	O
with	O
a	O
bare	O
finger	O
or	O
multiple	O
fingers	O
at	O
one	O
time	O
for	O
multi-touch	B-Application
sensing	O
.	O
</s>
<s>
The	O
search	O
button	O
opens	O
up	O
a	O
Bing	B-Application
search	I-Application
screen	O
.	O
</s>
<s>
The	O
device	O
contains	O
a	O
GPS	O
chip	O
to	O
show	O
the	O
location	O
of	O
the	O
phone	O
,	O
a	O
proximity	B-Device
sensor	I-Device
to	O
turn	O
the	O
screen	O
off	O
during	O
phone	O
calls	O
so	O
that	O
the	O
face	O
does	O
n't	O
accidentally	O
click	O
the	O
screen	O
,	O
a	O
G-sensor	O
,	O
an	O
ambient	O
light	O
sensor	O
to	O
dim	O
the	O
light	O
in	O
dark	O
rooms	O
and	O
increase	O
the	O
brightness	O
in	O
direct	O
sunlight	O
,	O
and	O
a	O
digital	O
compass	B-Language
.	O
</s>
<s>
The	O
Surround	O
uses	O
a	O
1GHz	O
Qualcomm	O
QSD8250	O
Snapdragon	B-Architecture
Chipset	I-Architecture
.	O
</s>
<s>
As	O
is	O
with	O
most	O
other	O
Windows	B-Protocol
Phone	I-Protocol
phones	O
,	O
the	O
HTC	B-Application
Surround	I-Application
does	O
not	O
support	O
external	O
memory	O
officially	O
.	O
</s>
<s>
Audio	O
is	O
undoubtedly	O
the	O
most	O
distinguishing	O
aspect	O
of	O
the	O
HTC	B-Application
Surround	I-Application
.	O
</s>
<s>
The	O
device	O
runs	O
on	O
T	O
's	O
3G	B-Architecture
network	I-Architecture
.	O
</s>
<s>
WiFi	O
tethering	O
,	O
initially	O
not	O
supported	O
,	O
has	O
been	O
added	O
with	O
Windows	B-Protocol
Phone	I-Protocol
7.5	O
but	O
AT&T	O
has	O
yet	O
to	O
push	O
the	O
firmware	O
update	O
from	O
HTC	O
.	O
</s>
<s>
The	O
device	O
,	O
shipped	O
with	O
Windows	B-Protocol
Phone	I-Protocol
7	O
as	O
its	O
operating	O
system	O
,	O
was	O
updated	O
in	O
September	O
2011	O
to	O
Windows	B-Protocol
Phone	I-Protocol
7.5	O
codename	O
Mango	O
.	O
</s>
