<s>
The	O
HTC	B-Application
Evo	I-Application
4G	I-Application
(	O
trademarked	O
in	O
capitals	O
as	O
EVO	B-Application
4G	I-Application
,	O
also	O
marketed	O
as	O
HTC	O
EVO	O
WiMAX	O
ISW11HT	O
in	O
Japan	O
)	O
is	O
a	O
smartphone	B-Application
developed	O
by	O
HTC	O
Corporation	O
and	O
marketed	O
as	O
Sprint	O
's	O
flagship	O
Android	B-Application
smartphone	B-Application
,	O
running	O
on	O
its	O
WiMAX	O
network	O
.	O
</s>
<s>
The	O
smartphone	B-Application
was	O
launched	O
on	O
June	O
4	O
,	O
2010	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
4G	B-Architecture
enabled	O
smartphone	B-Application
released	O
in	O
the	O
United	O
States	O
.	O
</s>
<s>
During	O
development	O
,	O
the	O
device	O
was	O
known	O
as	O
the	O
HTC	O
"	O
Supersonic	O
"	O
,	O
which	O
was	O
leaked	O
through	O
the	O
Internet	O
and	O
was	O
known	O
as	O
a	O
variant	O
of	O
the	O
HTC	O
HD2	O
running	O
Android	B-Application
.	O
</s>
<s>
The	O
device	O
became	O
the	O
top-selling	O
launch	O
day	O
phone	O
on	O
Sprint	O
,	O
surpassing	O
the	O
Palm	B-Application
Pre	I-Application
,	O
Samsung	O
Instinct	O
and	O
Motorola	B-Operating_System
Razr	I-Operating_System
V3	I-Operating_System
.	O
</s>
<s>
The	O
HTC	O
EVO	O
features	O
hardware	O
very	O
similar	O
to	O
the	O
HTC	O
HD2	O
,	O
a	O
smartphone	B-Application
running	O
Windows	O
Mobile	O
.	O
</s>
<s>
The	O
device	O
is	O
sometimes	O
referenced	O
as	O
the	O
Android	B-Application
version	O
of	O
the	O
HTC	O
HD2	O
although	O
a	O
variety	O
of	O
features	O
are	O
only	O
available	O
on	O
the	O
EVO	B-Application
4G	I-Application
(	O
video	B-Application
calling	I-Application
for	O
example	O
)	O
.	O
</s>
<s>
The	O
EVO	O
proved	O
a	O
trendsetter	O
among	O
Android	B-Application
phones	I-Application
.	O
</s>
<s>
Unlike	O
many	O
other	O
smartphones	B-Application
at	O
the	O
time	O
of	O
its	O
release	O
,	O
the	O
EVO	O
has	O
a	O
large	O
4.3-inches	O
(	O
480x800	O
)	O
TFT	B-Device
LCD	I-Device
capacitive	O
touch	B-Device
screen	I-Device
display	O
with	O
a	O
pixel	B-Algorithm
density	I-Algorithm
of	O
217	O
pixels	B-Algorithm
per	I-Algorithm
inch	I-Algorithm
(	O
ppi	B-Algorithm
)	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
EVO	O
has	O
a	O
balanced	O
hardware-software	O
user	B-Application
interface	I-Application
,	O
featuring	O
seven	O
hardware/touch	O
sensitive	O
buttons	O
,	O
four	O
of	O
which	O
are	O
on	O
the	O
front	O
of	O
the	O
device	O
.	O
</s>
<s>
Input	O
and	O
interaction	O
with	O
the	O
device	O
is	O
balanced	O
between	O
the	O
hardware	O
and	O
software	O
user	B-Application
interface	I-Application
and	O
in	O
most	O
situations	O
require	O
users	O
to	O
use	O
hardware/touch	O
sensitive	O
buttons	O
often	O
throughout	O
Android	B-Application
OS	I-Application
.	O
</s>
<s>
Like	O
most	O
Gingerbread	B-Application
era	I-Application
Android	I-Application
devices	O
,	O
the	O
EVO	O
features	O
four	O
main	O
touch-sensitive	B-Device
buttons	O
on	O
the	O
front	O
—	O
Home	O
,	O
Menu	O
,	O
Back	O
,	O
and	O
Search	O
.	O
</s>
<s>
The	O
touchscreen	B-Device
furnishes	O
the	O
remainder	O
of	O
the	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
A	O
proximity	B-Device
sensor	I-Device
deactivates	O
the	O
display	O
and	O
touchscreen	B-Device
when	O
the	O
device	O
is	O
brought	O
near	O
the	O
face	O
during	O
a	O
call	O
.	O
</s>
<s>
The	O
proximity	B-Device
sensor	I-Device
and	O
the	O
accelerometer	O
can	O
also	O
be	O
used	O
to	O
control	O
and/or	O
interact	O
with	O
third	O
party	O
apps	O
,	O
notably	O
games	O
.	O
</s>
<s>
The	O
device	O
also	O
features	O
a	O
GPS	O
chip	O
,	O
allowing	O
applications	O
(	O
with	O
user	O
permission	O
)	O
to	O
report	O
device	O
location	O
allowing	O
for	O
location-based	B-Application
services	I-Application
and	O
can	O
also	O
be	O
useful	O
to	O
turn-by-turn	B-Application
navigation	I-Application
apps	O
.	O
</s>
<s>
The	O
EVO	O
is	O
powered	O
by	O
the	O
Qualcomm	O
QSD8650	O
chipset	O
that	O
contains	O
a	O
Snapdragon	B-Architecture
Scorpion	O
microprocessor	O
clocked	O
at	O
1GHz	O
and	O
an	O
embedded	O
Adreno	O
200	O
graphics	O
chip	O
capable	O
of	O
up	O
to	O
22	O
million	O
triangles	O
per	O
second	O
.	O
</s>
<s>
It	O
features	O
512MB	O
of	O
eDRAM	O
,	O
which	O
allows	O
for	O
a	O
smoother	O
experience	O
with	O
Android	B-Application
OS	I-Application
,	O
applications	O
,	O
and	O
the	O
HTC	B-Application
Sense	I-Application
user	B-Application
interface	I-Application
.	O
</s>
<s>
The	O
EVO	O
features	O
a	O
rear-facing	O
backside	B-Algorithm
illumination	I-Algorithm
8-megapixel	O
camera	O
capable	O
of	O
recording	O
videos	O
in	O
720p	O
at	O
30	O
frames	O
per	O
second	O
and	O
dual	O
photoflash	O
,	O
which	O
helps	O
to	O
illuminate	O
objects	O
in	O
low-light	O
conditions	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
EVO	O
has	O
a	O
1.3-megapixel	O
camera	O
on	O
front	O
of	O
the	O
device	O
designed	O
for	O
use	O
with	O
video	B-Application
calling	I-Application
and	O
for	O
taking	O
portrait	O
images	O
,	O
although	O
it	O
can	O
also	O
be	O
used	O
in	O
other	O
applications	O
.	O
</s>
<s>
The	O
front	O
facing	O
camera	O
does	O
not	O
work	O
on	O
any	O
versions	O
of	O
Android	B-Application
higher	O
than	O
2.3.7	O
Gingerbread	B-Application
.	O
</s>
<s>
Like	O
many	O
other	O
Android	B-Application
mobile	I-Application
devices	O
,	O
the	O
HTC	B-Application
EVO	I-Application
4G	I-Application
features	O
a	O
microSD	O
slot	O
in	O
addition	O
to	O
the	O
built-in	O
ROM	O
that	O
allows	O
for	O
user-expandable	O
storage	O
.	O
</s>
<s>
With	O
Android	B-Application
version	O
2.2	O
+	O
(	O
Froyo	B-Application
)	O
available	O
as	O
an	O
over-the-air	O
upgrade	O
,	O
the	O
OS	O
supports	O
applications	O
that	O
permit	O
themselves	O
to	O
be	O
installed	O
on	O
the	O
SD	O
card	O
.	O
</s>
<s>
The	O
EVO	O
features	O
a	O
CDMA	B-Protocol
cellular	O
radio	O
that	O
supports	O
3G	O
EVDO	O
,	O
Revisions	O
0	O
,	O
A	O
,	O
and	O
the	O
yet-undeployed	O
B	O
allowing	O
faster	O
download	O
and	O
upload	O
speeds	O
,	O
greater	O
power	O
efficiency	O
;	O
and	O
WiMAX	O
,	O
a	O
protocol	O
known	O
as	O
802.16e	O
,	O
featuring	O
speeds	O
of	O
up	O
to	O
10	O
Mbit/s	O
on	O
the	O
downlink	O
and	O
1.5	O
Mbit/s	O
on	O
the	O
uplink	O
.	O
</s>
<s>
The	O
device	O
is	O
marketed	O
as	O
a	O
4G	B-Architecture
phone	O
,	O
WiMAX	O
is	O
considered	O
to	O
be	O
a	O
4G	B-Architecture
technology	I-Architecture
based	O
on	O
4G	B-Architecture
standards	O
recently	O
set	O
by	O
ITU-R	O
.	O
4G	B-Architecture
for	O
this	O
device	O
does	O
not	O
work	O
on	O
Android	B-Application
versions	O
above	O
2.3.7	O
Gingerbread	B-Application
.	O
</s>
<s>
The	O
battery	O
is	O
interchangeable	O
with	O
batteries	O
from	O
the	O
HTC	B-Application
Incredible	I-Application
,	O
HTC	O
Touch	O
Pro	O
2	O
,	O
HTC	B-Application
Arrive	I-Application
,	O
and	O
HTC	B-Application
Hero	I-Application
(	O
CDMA	B-Protocol
)	O
.	O
</s>
<s>
The	O
device	O
sports	O
the	O
HTC	B-Application
Sense	I-Application
user	B-Application
interface	I-Application
that	O
runs	O
on	O
top	O
of	O
the	O
Android	B-Application
operating	I-Application
system	I-Application
and	O
presents	O
information	O
through	O
the	O
Android	B-Application
desktop	O
widgets	O
and	O
application	O
,	O
and	O
includes	O
launchers	O
,	O
app	O
drawer	O
,	O
and	O
lock	O
screen	O
replacements	O
.	O
</s>
<s>
The	O
device	O
first	O
came	O
with	O
Android	B-Application
OS	I-Application
2.1	I-Application
"	I-Application
Eclair	I-Application
"	I-Application
although	O
Android	B-Application
OS	I-Application
2.2	I-Application
"	I-Application
Froyo	I-Application
"	I-Application
has	O
since	O
been	O
rolled	O
out	O
through	O
OTA	O
(	O
Over-The-Air	O
)	O
making	O
it	O
the	O
third	O
device	O
to	O
officially	O
run	O
"	O
Froyo	B-Application
"	O
and	O
the	O
first	O
to	O
be	O
officially	O
rolled	O
out	O
by	O
a	O
US	O
network	O
.	O
</s>
<s>
Exactly	O
a	O
year	O
after	O
the	O
phone	O
's	O
official	O
release	O
,	O
the	O
EVO	O
received	O
an	O
update	O
to	O
Android	B-Application
2.3.3	I-Application
(	O
Gingerbread	B-Application
)	O
.	O
</s>
<s>
Improvements	O
aside	O
from	O
the	O
upgraded	O
Android	B-Application
OS	I-Application
include	O
a	O
fix	O
for	O
battery	O
issues	O
,	O
increases	O
battery	O
life	O
,	O
includes	O
the	O
ability	O
to	O
sync	O
multiple	O
Gmail	O
accounts	O
,	O
and	O
a	O
few	O
user	B-Application
interface	I-Application
tweaks	O
.	O
</s>
<s>
A	O
second	O
update	O
was	O
pushed	O
by	O
Sprint	O
on	O
June	O
20	O
,	O
2011	O
,	O
fixing	O
magnetometer	O
(	O
compass	B-Language
)	O
issues	O
,	O
Netflix	O
streaming	O
,	O
voicemail	O
notifications	O
,	O
and	O
hearing	O
aid	O
compatibility	O
.	O
</s>
<s>
The	O
Phone	O
(	O
like	O
many	O
of	O
the	O
phones	O
from	O
this	O
year	O
)	O
did	O
NOT	O
officially	O
get	O
the	O
Android	B-Application
Ice	I-Application
Cream	I-Application
Sandwich	I-Application
Update	O
.	O
</s>
<s>
Only	O
getting	O
the	O
2010	O
versions	O
of	O
Android	B-Application
.	O
</s>
<s>
The	O
EVO	O
has	O
also	O
seen	O
support	O
from	O
the	O
developer	O
community	O
with	O
Android	B-Application
versions	O
including	O
Ice	B-Application
Cream	I-Application
Sandwich	I-Application
4.0	O
,	O
Jelly	B-Application
Bean	I-Application
4.1	O
-	O
4.3	O
,	O
and	O
finally	O
KitKat	B-Application
4.4	O
,	O
some	O
of	O
which	O
are	O
available	O
with	O
HTC	B-Application
Sense	I-Application
while	O
other	O
available	O
versions	O
are	O
based	O
on	O
stock	O
Android	B-Application
.	O
</s>
<s>
As	O
of	O
the	O
end	O
of	O
2016	O
,	O
there	O
is	O
very	O
little	O
,	O
if	O
any	O
,	O
support	O
from	O
the	O
community	O
due	O
to	O
the	O
age	O
of	O
the	O
device	O
and	O
the	O
fact	O
that	O
more	O
recent	O
versions	O
of	O
Android	B-Application
(	O
5.0	O
+	O
)	O
on	O
this	O
device	O
may	O
not	O
run	O
.	O
</s>
<s>
In	O
HTC	B-Application
Sense	I-Application
,	O
the	O
interface	O
is	O
based	O
around	O
home	O
screen	O
panels	O
which	O
in	O
total	O
are	O
seven	O
panels	O
that	O
allows	O
user-customization	O
.	O
</s>
<s>
The	O
launcher	O
,	O
located	O
at	O
the	O
bottom	O
of	O
the	O
screen	O
,	O
displays	O
icons	O
to	O
open	O
the	O
App	O
Drawer	O
,	O
Phone	O
application	O
,	O
and	O
the	O
ability	O
to	O
add	O
widgets	O
on	O
the	O
Android	B-Application
desktop	O
,	O
and	O
is	O
shown	O
throughout	O
all	O
seven	O
home	O
screen	O
panels	O
.	O
</s>
<s>
Unlike	O
other	O
custom	O
user	B-Application
interfaces	I-Application
for	O
the	O
Android	B-Application
OS	I-Application
like	O
Samsung	O
's	O
TouchWiz	B-Application
UI	I-Application
,	O
HTC	B-Application
Sense	I-Application
does	O
not	O
allow	O
disabling	O
or	O
removing	O
a	O
panel	O
.	O
</s>
<s>
Most	O
of	O
the	O
input	O
on	O
the	O
device	O
is	O
given	O
through	O
the	O
touchscreen	B-Device
,	O
which	O
understands	O
complex	O
gestures	O
using	O
multi-touch	B-Application
.	O
</s>
<s>
Android	B-Application
's	O
interaction	B-Application
techniques	I-Application
enable	O
moving	O
up	O
or	O
down	O
by	O
a	O
touch-drag	O
motion	O
of	O
the	O
finger	O
.	O
</s>
<s>
However	O
the	O
buttons	O
on	O
the	O
front	O
of	O
the	O
device	O
will	O
also	O
require	O
frequent	O
use	O
throughout	O
various	O
applications	O
in	O
Android	B-Application
OS	I-Application
as	O
the	O
buttons	O
play	O
an	O
important	O
part	O
in	O
the	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
The	O
device	O
clock	O
is	O
15	O
seconds	O
faster	O
than	O
Coordinated	O
Universal	O
Time	O
(	O
UTC	O
)	O
,	O
either	O
with	O
Android	B-Application
2.1	I-Application
,	O
2.2	O
or	O
2.3	O
;	O
a	O
manual	O
clock	O
setting	O
does	O
not	O
override	O
seconds	O
,	O
and	O
root	O
authority	O
would	O
be	O
needed	O
to	O
overcome	O
issue	O
using	O
Network	B-Protocol
Time	I-Protocol
Protocol	I-Protocol
(	O
ntp	O
)	O
software	O
.	O
</s>
<s>
The	O
15-second	O
offset	O
hints	O
the	O
number	O
of	O
leap	O
seconds	O
introduced	O
since	O
GPS	O
inception	O
in	O
1980	O
rather	O
than	O
an	O
epoch	B-Operating_System
issue	O
and	O
was	O
reported	O
as	O
an	O
Android	B-Application
bug	O
on	O
December	O
16	O
,	O
2009	O
.	O
</s>
<s>
Certain	O
phones	O
running	O
Android	B-Application
including	O
Samsung	B-Application
EPIC	I-Application
do	O
not	O
exhibit	O
the	O
issue	O
,	O
possibly	O
because	O
firmware	O
fetches	O
UTC	O
value	O
rather	O
than	O
GPS	O
from	O
Network	O
time	O
,	O
or	O
subtracts	O
leap	O
second	O
offset	O
.	O
</s>
<s>
Sprint	O
,	O
HTC	O
,	O
OHA	O
,	O
Google	O
and	O
goodandevo.net	O
were	O
informed	O
of	O
the	O
aforesaid	O
issue	O
earlier	O
than	O
October	O
2010	O
,	O
reported	O
as	O
Android	B-Application
bug	O
5485	O
.	O
</s>
<s>
HTC	O
update	O
3.70.651.1	O
released	O
on	O
December	O
15	O
,	O
2010	O
still	O
did	O
not	O
overcome	O
the	O
issue	O
,	O
and	O
neither	O
did	O
build	O
4.22.651.2	O
(	O
Android	B-Application
2.3.3	I-Application
)	O
released	O
on	O
June	O
3	O
,	O
2011	O
.	O
</s>
<s>
The	O
OTA	O
upgrade	O
to	O
Android	B-Application
2.3.3	I-Application
fixes	O
this	O
issue	O
along	O
with	O
improving	O
device	O
battery	O
life	O
on	O
the	O
whole	O
.	O
</s>
<s>
The	O
EVO	O
's	O
design	O
is	O
derived	O
from	O
its	O
Windows	O
Mobile-based	O
brother	O
,	O
the	O
HTC	O
HD2	O
,	O
which	O
also	O
has	O
a	O
multi-touch	B-Application
capacitive	O
touchscreen	B-Device
,	O
nearly	O
the	O
same	O
slim	O
profile	O
,	O
and	O
the	O
same	O
placements	O
of	O
most	O
general	O
components	O
and	O
buttons	O
.	O
</s>
<s>
Kickstand	O
,	O
and	O
touch-sensitive	B-Device
buttons	O
instead	O
of	O
hardware	O
buttons	O
.	O
</s>
<s>
Another	O
feature	O
is	O
Android-specific	O
buttons	O
.	O
</s>
