<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
(	O
also	O
known	O
as	O
iPhone	B-Operating_System
2	I-Operating_System
)	O
is	O
a	O
smartphone	B-Application
that	O
was	O
designed	O
and	O
marketed	O
by	O
Apple	O
Inc.	O
;	O
it	O
is	O
the	O
second	O
generation	B-Application
of	O
iPhone	B-Operating_System
,	O
successor	O
to	O
the	O
original	B-Operating_System
iPhone	I-Operating_System
,	O
and	O
was	O
introduced	O
on	O
June	O
9	O
,	O
2008	O
,	O
at	O
the	O
WWDC	O
2008	O
at	O
the	O
Moscone	O
Center	O
in	O
San	O
Francisco	O
,	O
United	O
States	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
is	O
internally	O
similar	O
to	O
its	O
predecessor	O
,	O
but	O
included	O
several	O
new	O
hardware	O
features	O
,	O
such	O
as	O
GPS	O
,	O
3G	B-Architecture
data	O
and	O
tri-band	O
UMTS/HSDPA	O
.	O
</s>
<s>
The	O
device	O
was	O
originally	O
loaded	O
with	O
the	O
concurrently	O
launched	O
iPhone	B-Operating_System
OS	I-Operating_System
2.0	I-Operating_System
.	O
</s>
<s>
In	O
addition	O
to	O
other	O
features	O
(	O
including	O
push	B-General_Concept
email	I-General_Concept
and	O
turn-by-turn	B-Application
navigation	I-Application
)	O
,	O
this	O
new	O
operating	O
system	O
introduced	O
the	O
App	O
StoreApple	O
's	O
new	O
distribution	O
platform	O
for	O
third-party	O
applications	O
.	O
</s>
<s>
On	O
July	O
11	O
,	O
2008	O
,	O
Apple	O
released	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
across	O
twenty-two	O
countries	O
in	O
two	O
storage	O
options	O
,	O
8GB	O
and	O
16GB	O
.	O
</s>
<s>
Following	O
the	O
release	O
of	O
the	O
successor	O
iPhone	B-Operating_System
3GS	I-Operating_System
model	O
around	O
one	O
year	O
later	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
remained	O
on	O
sale	O
but	O
became	O
Apple	O
's	O
budget	O
phone	O
offer	O
,	O
with	O
its	O
price	O
reduced	O
.	O
</s>
<s>
This	O
$99	O
iPhone	B-Operating_System
3G	I-Operating_System
required	O
a	O
two-year	O
contract	O
and	O
was	O
available	O
only	O
in	O
black	O
and	O
with	O
8GB	O
of	O
storage	O
,	O
but	O
came	O
bundled	O
with	O
the	O
then-new	O
IPhone	B-Operating_System
OS	I-Operating_System
3.0	I-Operating_System
firmware	O
.	O
</s>
<s>
Without	O
a	O
contract	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
was	O
available	O
no-commitment	O
from	O
AT&T	O
for	O
$499	O
(	O
8GB	O
)	O
or	O
$549	O
(	O
16GB	O
)	O
in	O
2009	O
.	O
</s>
<s>
On	O
June	O
7	O
,	O
2010	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
was	O
finally	O
discontinued	O
,	O
and	O
replaced	O
as	O
Apple	O
's	O
budget	O
phone	O
by	O
an	O
8GB	O
iPhone	B-Operating_System
3GS	I-Operating_System
selling	O
for	O
$99	O
with	O
a	O
2-year	O
contract	O
.	O
</s>
<s>
In	O
2008	O
,	O
Import	O
Genius	O
,	O
a	O
provider	O
of	O
business	B-General_Concept
intelligence	I-General_Concept
for	O
the	O
import-export	O
industry	O
,	O
used	O
electronic	O
customs	O
clearance	O
data	O
,	O
which	O
is	O
published	O
by	O
U.S.	O
Customs	O
and	O
Border	O
Protection	O
pursuant	O
to	O
the	O
Freedom	O
of	O
Information	O
Act	O
,	O
to	O
detect	O
the	O
arrival	O
of	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
prior	O
to	O
Apple	O
's	O
announcement	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
came	O
preloaded	O
with	O
the	O
latest	O
version	O
of	O
iOS	B-Application
and	O
continued	O
to	O
receive	O
updates	O
to	O
its	O
software	O
for	O
over	O
two	O
years	O
,	O
with	O
major	O
iterations	O
released	O
on	O
an	O
annual	O
basis	O
.	O
</s>
<s>
When	O
it	O
was	O
launched	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
came	O
preloaded	O
with	O
iPhone	B-Operating_System
OS	I-Operating_System
2.0	I-Operating_System
.	O
</s>
<s>
This	O
introduced	O
the	O
App	B-Application
Store	I-Application
,	O
Microsoft	O
Exchange	O
ActiveSync	O
support	O
,	O
Apple	O
's	O
MobileMe	O
service	O
,	O
and	O
push	B-General_Concept
email	I-General_Concept
support	O
,	O
along	O
with	O
other	O
new	O
features	O
and	O
bug	O
fixes	O
.	O
</s>
<s>
In	O
June	O
2009	O
,	O
iPhone	B-Operating_System
3G	I-Operating_System
users	O
received	O
the	O
iPhone	B-Operating_System
OS	I-Operating_System
3.0	I-Operating_System
software	O
update	O
,	O
which	O
introduced	O
the	O
long-awaited	O
MMS	O
feature	O
,	O
copy	O
and	O
paste	O
,	O
landscape	O
support	O
for	O
more	O
applications	O
,	O
Bluetooth	B-Protocol
stereo	O
support	O
,	O
and	O
other	O
improvements	O
.	O
</s>
<s>
In	O
June	O
2010	O
,	O
Apple	O
released	O
the	O
iOS	B-Operating_System
4.0	I-Operating_System
software	O
update	O
.	O
</s>
<s>
Unlike	O
its	O
successor	O
models	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
does	O
not	O
support	O
prominent	O
features	O
of	O
iOS	B-Operating_System
4.0	I-Operating_System
such	O
as	O
multitasking	O
,	O
the	O
ability	O
to	O
set	O
a	O
home	O
screen	O
wallpaper	O
,	O
or	O
Bluetooth	B-Protocol
keyboard	O
support	O
.	O
</s>
<s>
This	O
update	O
was	O
widely	O
criticized	O
for	O
slow	O
performance	O
on	O
iPhone	B-Operating_System
3G	I-Operating_System
,	O
though	O
September	O
2010	O
's	O
iOS	O
4.1	O
release	O
resolved	O
this	O
problem	O
.	O
</s>
<s>
However	O
,	O
unlike	O
more	O
modern	O
iOS	B-Application
devices	O
,	O
this	O
update	O
again	O
does	O
not	O
provide	O
iPhone	B-Operating_System
3G	I-Operating_System
owners	O
with	O
access	O
to	O
important	O
features	O
,	O
in	O
this	O
case	O
,	O
the	O
Game	B-Operating_System
Center	I-Operating_System
Application	O
.	O
</s>
<s>
On	O
November	O
22	O
,	O
2010	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
received	O
the	O
iOS	O
4.2	O
software	O
update	O
(	O
as	O
iOS	O
4.2.1	O
)	O
,	O
which	O
introduced	O
features	O
such	O
as	O
YouTube	O
voting	O
,	O
and	O
security	O
fixes	O
.	O
</s>
<s>
However	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
is	O
unable	O
to	O
use	O
many	O
features	O
included	O
in	O
this	O
update	O
,	O
such	O
as	O
AirPlay	O
and	O
Safari	O
Text	O
Search	O
.	O
</s>
<s>
This	O
is	O
the	O
last	O
iOS	B-Application
release	O
to	O
support	O
this	O
iPhone	B-Operating_System
model	O
;	O
iOS	B-Operating_System
4.3	I-Operating_System
and	O
later	O
are	O
not	O
compatible	O
with	O
this	O
iPhone	B-Operating_System
model	O
due	O
to	O
hardware	O
limitations	O
and	O
performance	O
issues	O
.	O
</s>
<s>
Virtually	O
all	O
apps	O
released	O
after	O
the	O
release	O
of	O
iOS	B-Application
6	O
in	O
late	O
September	O
2012	O
do	O
not	O
run	O
on	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
,	O
as	O
the	O
software	O
development	O
kit	O
(	O
SDK	O
)	O
was	O
changed	O
to	O
no	O
longer	O
allow	O
the	O
"	O
targeting	O
"	O
(	O
minimum	O
)	O
of	O
iOS	B-Application
versions	O
older	O
than	O
4.3	O
(	O
including	O
3.x	O
and	O
up	O
to	O
4.2.1	O
)	O
,	O
or	O
ARMv6	O
devices	O
(	O
first	O
two	O
generations	O
)	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
's	O
back	O
featured	O
a	O
redesigned	O
polycarbonate	O
plastic	O
housing	O
,	O
replacing	O
the	O
aluminum	O
back	O
of	O
the	O
first	O
generation	B-Application
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
introduced	O
the	O
first	O
official	O
color	O
options	O
for	O
the	O
outer	O
casing	O
,	O
with	O
the	O
16GB	O
version	O
available	O
in	O
black	O
and	O
white	O
.	O
</s>
<s>
The	O
dimensions	O
of	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
were	O
marginally	O
larger	O
than	O
those	O
of	O
the	O
original	B-Operating_System
iPhone	I-Operating_System
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
sported	O
a	O
capacitive	O
touchscreen	B-Device
with	O
a	O
480×320	O
(	O
HVGA	O
)	O
resolution	B-Algorithm
at	O
163	O
ppi	B-Algorithm
.	O
</s>
<s>
Just	O
like	O
the	O
original	B-Operating_System
iPhone	I-Operating_System
,	O
the	O
touchscreen	B-Device
was	O
designed	O
for	O
a	O
bare	O
finger	O
,	O
or	O
multiple	O
fingers	O
for	O
multi-touch	B-Application
sensing	O
.	O
</s>
<s>
The	O
proximity	B-Device
sensor	I-Device
(	O
which	O
deactivates	O
the	O
display	O
during	O
calls	O
when	O
the	O
face	O
is	O
near	O
)	O
was	O
repositioned	O
to	O
save	O
battery	O
power	O
and	O
to	O
prevent	O
inadvertent	O
inputs	O
from	O
the	O
user	O
's	O
face	O
and	O
ears	O
.	O
</s>
<s>
Most	O
of	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
's	O
internal	O
hardware	O
is	O
based	O
on	O
the	O
original	B-Operating_System
iPhone	I-Operating_System
.	O
</s>
<s>
It	O
includes	O
a	O
Samsung	B-Application
32-bit	O
RISC	B-Architecture
ARM11	O
620MHz	O
processor	O
(	O
underclocked	B-Device
to	O
412MHz	O
)	O
,	O
a	O
PowerVR	B-Device
MBX	O
Lite	O
3D	O
GPU	B-Architecture
,	O
and	O
128MB	O
of	O
package	B-Algorithm
on	I-Algorithm
package	I-Algorithm
(	O
PoP	O
)	O
DRAM	O
,	O
as	O
the	O
original	B-Operating_System
iPhone	I-Operating_System
did	O
.	O
</s>
<s>
On	O
the	O
rear	O
of	O
the	O
device	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
features	O
the	O
same	O
fixed-focus	O
2.0	O
megapixel	O
camera	O
of	O
its	O
predecessor	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
's	O
operating	O
system	O
supports	O
the	O
geotagging	O
of	O
photographs	O
.	O
</s>
<s>
In	O
addition	O
to	O
EDGE	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
supports	O
Assisted	O
GPS	O
,	O
3G	B-Architecture
data	O
,	O
and	O
tri-band	O
UMTS/HSDPA	O
.	O
</s>
<s>
These	O
enhancements	O
allow	O
faster	O
data	O
downloads	O
and	O
turn-by-turn	B-Application
navigation	I-Application
with	O
maps	O
compared	O
to	O
previous	O
devices	O
.	O
</s>
<s>
Like	O
its	O
predecessor	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
features	O
a	O
proprietary	O
30-pin	O
dock	B-Operating_System
connector	I-Operating_System
for	O
charging	O
the	O
device	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
features	O
a	O
flush-mounted	O
3.5mm	O
headphone	B-Device
jack	I-Device
instead	O
of	O
the	O
recessed	O
headphone	B-Device
jack	I-Device
that	O
was	O
included	O
on	O
the	O
original	B-Operating_System
iPhone	I-Operating_System
;	O
it	O
could	O
,	O
therefore	O
,	O
be	O
used	O
with	O
any	O
headphones	O
other	O
than	O
those	O
provided	O
by	O
Apple	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3G	I-Operating_System
features	O
an	O
internal	O
rechargeable	O
battery	O
rated	O
at	O
1150	O
mAh	O
,	O
which	O
,	O
like	O
its	O
predecessor	O
,	O
is	O
not	O
user-replaceable	O
.	O
</s>
<s>
Apple	O
stated	O
that	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
's	O
battery	O
is	O
capable	O
of	O
providing	O
up	O
to	O
six	O
hours	O
of	O
web	O
browsing	O
via	O
Wi-Fi	O
,	O
or	O
five	O
hours	O
via	O
3G	B-Architecture
,	O
or	O
25	O
hours	O
of	O
audio	O
playback	O
.	O
</s>
<s>
iOS	B-Operating_System
4	I-Operating_System
,	O
which	O
was	O
still	O
compatible	O
with	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
,	O
was	O
released	O
on	O
June	O
21	O
,	O
2010	O
.	O
</s>
<s>
An	O
article	O
in	O
the	O
Wall	O
Street	O
Journal	O
's	O
Digits	O
column	O
on	O
July	O
28	O
,	O
2010	O
,	O
reported	O
that	O
iPhone	B-Operating_System
3G	I-Operating_System
phones	O
updating	O
to	O
iOS	B-Operating_System
4	I-Operating_System
responded	O
slowly	O
,	O
had	O
diminished	O
battery	O
life	O
,	O
and	O
became	O
excessively	O
hot	O
.	O
</s>
