<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
(	O
originally	O
styled	O
iPhone	B-Operating_System
3G	I-Operating_System
S	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
</s>
<s>
It	O
is	O
the	O
third	O
generation	B-Application
iPhone	B-Operating_System
and	O
the	O
successor	O
to	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
.	O
</s>
<s>
This	O
iPhone	B-Operating_System
is	O
named	O
"	O
3GS	B-Operating_System
"	O
where	O
"	O
S	O
"	O
stood	O
for	O
Speed	O
(	O
Phil	O
Schiller	O
had	O
mentioned	O
it	O
in	O
the	O
launch	O
keynote	O
)	O
.	O
</s>
<s>
Improvements	O
include	O
performance	O
,	O
a	O
3-megapixel	O
camera	O
with	O
higher	O
resolution	B-Algorithm
and	O
video	O
ability	O
,	O
voice	B-Application
control	I-Application
,	O
and	O
support	O
for	O
7.2Mbit/s	O
HSDPA	O
downloading	O
(	O
but	O
remains	O
limited	O
to	O
uploading	O
as	O
Apple	O
had	O
not	O
implemented	O
the	O
HSUPA	O
protocol	O
)	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
runs	O
Apple	O
's	O
iOS	B-Application
operating	O
system	O
.	O
</s>
<s>
It	O
was	O
succeeded	O
as	O
Apple	O
's	O
flagship	O
smartphone	B-Application
in	O
2010	O
by	O
the	O
iPhone	B-Operating_System
4	I-Operating_System
.	O
</s>
<s>
On	O
June	O
24	O
,	O
2010	O
an	O
8GB	O
model	O
was	O
released	O
,	O
discontinuing	O
the	O
16	O
and	O
32GB	O
models	O
,	O
the	O
8GB	O
3GS	B-Operating_System
continued	O
in	O
production	O
until	O
September	O
2012	O
when	O
the	O
iPhone	B-Operating_System
5	I-Operating_System
was	O
announced	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
was	O
released	O
on	O
June	O
19	O
,	O
2009	O
in	O
the	O
United	O
States	O
,	O
Canada	O
,	O
France	O
,	O
Germany	O
,	O
Italy	O
,	O
Spain	O
,	O
Switzerland	O
,	O
and	O
the	O
United	O
Kingdom	O
.	O
</s>
<s>
Within	O
the	O
first	O
weekend	O
of	O
its	O
release	O
,	O
over	O
1	O
million	O
iPhone	B-Operating_System
3GS	I-Operating_System
units	O
were	O
sold	O
.	O
</s>
<s>
It	O
reached	O
its	O
first	O
million	O
units	O
sold	O
as	O
quickly	O
as	O
its	O
predecessor	O
,	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
.	O
</s>
<s>
After	O
the	O
release	O
of	O
the	O
iPhone	B-Operating_System
4S	I-Operating_System
,	O
the	O
3GS	B-Operating_System
was	O
still	O
offered	O
for	O
free	O
on	O
a	O
contract	O
until	O
November	O
2011	O
,	O
when	O
AT&T	O
raised	O
the	O
price	O
to	O
59	O
cents	O
with	O
no	O
explanation	O
.	O
</s>
<s>
The	O
new	O
features	O
of	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
are	O
mainly	O
internal	O
changes	O
regarding	O
speed	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
was	O
reportedly	O
twice	O
as	O
fast	O
as	O
its	O
predecessor	O
.	O
</s>
<s>
Though	O
in	O
addition	O
to	O
the	O
upgrades	O
mainly	O
regarding	O
performance	O
,	O
various	O
software	O
features	O
were	O
also	O
introduced	O
exclusively	O
to	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
such	O
as	O
video	O
recording	O
,	O
voice	B-Application
control	I-Application
,	O
and	O
digital	O
compass	B-Language
.	O
</s>
<s>
The	O
features	O
iOS	B-Application
,	O
Apple	O
's	O
mobile	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
.	O
</s>
<s>
The	O
user	B-Application
interface	I-Application
of	O
iOS	B-Application
is	O
based	O
on	O
the	O
concept	O
of	O
direct	O
manipulation	O
,	O
using	O
multi-touch	B-Application
gestures	O
.	O
</s>
<s>
Interaction	O
with	O
the	O
OS	O
includes	O
gestures	O
such	O
as	O
swipe	O
,	O
tap	O
,	O
pinch	O
,	O
and	O
reverse	O
pinch	O
,	O
all	O
of	O
which	O
have	O
specific	O
definitions	O
within	O
the	O
context	O
of	O
the	O
iOS	B-Application
operating	O
system	O
and	O
its	O
multi-touch	B-Application
interface	O
.	O
</s>
<s>
The	O
LCD	B-Device
display	I-Device
on	O
the	O
device	O
was	O
designed	O
by	O
Apple	O
and	O
made	O
by	O
LG	O
.	O
</s>
<s>
It	O
features	O
a	O
capacitive	O
touchscreen	B-Device
with	O
a	O
pixel	B-Algorithm
density	I-Algorithm
of	O
163	O
pixels	B-Algorithm
per	I-Algorithm
inch	I-Algorithm
(	O
ppi	B-Algorithm
)	O
on	O
a	O
480-by-320	O
display	O
.	O
</s>
<s>
Improvements	O
over	O
its	O
predecessor	B-Operating_System
's	I-Operating_System
screen	O
include	O
24-bit	O
color	O
emulation	O
(	O
18-bit	O
color	O
display	O
plus	O
dithering	O
)	O
for	O
a	O
more	O
color	O
rich	O
display	O
and	O
oleophobic	O
coating	O
to	O
help	O
reduce	O
fingerprints	O
on	O
the	O
display	O
.	O
</s>
<s>
The	O
capacitive	O
touchscreen	B-Device
is	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
iPhone	B-Operating_System
3GS	I-Operating_System
features	O
an	O
improved	O
3-megapixel	O
camera	O
manufactured	O
by	O
OmniVision	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
higher	O
pixel	B-Algorithm
count	O
,	O
it	O
also	O
features	O
auto-focus	O
,	O
auto	O
white	O
balance	O
and	O
auto	O
macro	O
and	O
is	O
capable	O
of	O
capturing	O
VGA	B-Protocol
video	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
's	O
camera	O
app	O
features	O
a	O
slider	O
which	O
allows	O
users	O
to	O
switch	O
between	O
capturing	O
photos	O
and	O
recording	O
videos	O
,	O
a	O
tap-to-focus	O
feature	O
which	O
allows	O
users	O
to	O
tap	O
on	O
an	O
area	O
of	O
the	O
camera	O
image	O
to	O
auto-focus	O
on	O
,	O
5x	O
digital	O
zoom	O
(	O
iOS	B-Application
4	O
or	O
later	O
)	O
,	O
autofocus	O
and	O
auto	O
exposure	O
lock	O
when	O
holding	O
an	O
area	O
down	O
(	O
iOS	B-Application
5	O
or	O
later	O
)	O
,	O
and	O
gridlines	O
for	O
composition	O
(	O
iOS	B-Application
5	O
or	O
later	O
)	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
is	O
powered	O
by	O
the	O
Samsung	B-Application
APL0298C05	O
chip	O
,	O
which	O
was	O
designed	O
and	O
manufactured	O
by	O
Samsung	B-Application
.	O
</s>
<s>
This	O
is	O
the	O
first	O
iPhone	B-Operating_System
with	O
a	O
system-on-a-chip	O
.	O
</s>
<s>
This	O
system-on-a-chip	O
is	O
composed	O
of	O
an	O
ARM	B-Application
Cortex-A8	I-Application
CPU	O
core	O
underclocked	O
to	O
600MHz	O
(	O
from	O
833MHz	O
)	O
,	O
integrated	O
with	O
a	O
PowerVR	B-Device
SGX	O
535	O
GPU	O
.	O
</s>
<s>
It	O
has	O
256MB	O
of	O
package	B-Algorithm
on	I-Algorithm
package	I-Algorithm
(	O
PoP	O
)	O
DRAM	O
,	O
twice	O
the	O
amount	O
of	O
the	O
3G	O
,	O
allowing	O
for	O
increased	O
performance	O
and	O
multi-tasking	O
.	O
</s>
<s>
Apple	O
claims	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
is	O
2x	O
faster	O
than	O
its	O
predecessor	O
,	O
showing	O
demonstrations	O
of	O
various	O
apps	O
loading	O
in	O
half	O
the	O
time	O
its	O
predecessor	O
does	O
.	O
</s>
<s>
As	O
on	O
previous	O
models	O
,	O
all	O
data	O
is	O
stored	O
in	O
flash	B-Device
memory	I-Device
and	O
not	O
in	O
the	O
SIM	O
and	O
it	O
does	O
not	O
offer	O
any	O
options	O
to	O
expand	O
storage	O
.	O
</s>
<s>
Initially	O
,	O
it	O
was	O
only	O
available	O
in	O
16	O
and	O
32GB	O
though	O
an	O
8GB	O
model	O
was	O
later	O
released	O
,	O
with	O
Apple	O
discontinuing	O
the	O
16	O
and	O
32GB	O
models	O
,	O
forcing	O
those	O
needing	O
more	O
storage	O
to	O
select	O
an	O
iPhone	B-Operating_System
4	I-Operating_System
,	O
or	O
buy	O
an	O
older	O
model	O
3GS	B-Operating_System
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
is	O
powered	O
by	O
an	O
internal	O
3.7V	O
1220mAh	O
rechargeable	O
lithium-ion	O
polymer	O
battery	O
and	O
is	O
designed	O
to	O
retain	O
up	O
to	O
80%	O
of	O
its	O
original	O
capacity	O
after	O
400	O
full	O
charge	O
and	O
discharge	O
cycles	O
.	O
</s>
<s>
A	O
battery	O
life	O
indicator	O
in	O
percentage	O
was	O
also	O
exclusive	O
to	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
.	O
</s>
<s>
Apple	O
claims	O
that	O
the	O
3GS	B-Operating_System
can	O
last	O
for	O
up	O
to	O
ten	O
hours	O
of	O
video	O
,	O
nine	O
hours	O
of	O
web	O
browsing	O
on	O
Wi-Fi	O
,	O
twelve	O
hours	O
of	O
2G	O
talk	O
time	O
,	O
or	O
five	O
on	O
3G	O
,	O
30	O
hours	O
of	O
music	O
,	O
or	O
300	O
hours	O
of	O
standby	O
.	O
</s>
<s>
A	O
magnetometer	O
is	O
also	O
built-in	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
,	O
which	O
is	O
used	O
to	O
measure	O
the	O
strength	O
and/or	O
direction	O
of	O
the	O
magnetic	O
field	O
in	O
the	O
vicinity	O
of	O
the	O
device	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
also	O
features	O
a	O
Compass	B-Language
app	O
that	O
was	O
unique	O
at	O
the	O
time	O
of	O
release	O
,	O
showing	O
a	O
compass	B-Language
that	O
points	O
in	O
the	O
direction	O
of	O
the	O
magnetic	O
field	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
's	O
Tri-band	O
UMTS/HSDPA	O
radio	O
and	O
quad-band	O
GSM/GPRS/EDGE	O
radio	O
,	O
the	O
3GS	B-Operating_System
also	O
adds	O
support	O
for	O
7.2	O
Mbit/s	O
HSDPA	O
allowing	O
faster	O
downlink	O
speeds	O
though	O
upload	O
speeds	O
remain	O
the	O
same	O
as	O
Apple	O
had	O
not	O
implemented	O
the	O
HSUPA	O
protocol	O
.	O
</s>
<s>
The	O
Bluetooth	B-Protocol
server	O
on	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
has	O
also	O
been	O
slightly	O
improved	O
adding	O
support	O
for	O
Bluetooth	B-Protocol
2.1	O
specifications	O
.	O
</s>
<s>
Voice	B-Application
Control	I-Application
was	O
introduced	O
as	O
an	O
exclusive	O
feature	O
of	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
and	O
allows	O
for	O
the	O
controlling	O
of	O
the	O
phone	O
and	O
music	O
features	O
of	O
the	O
phone	O
by	O
voice	O
.	O
</s>
<s>
There	O
are	O
two	O
ways	O
to	O
activate	O
Voice	B-Application
Control	I-Application
:	O
hold	O
the	O
Home	O
button	O
while	O
in	O
the	O
home	O
screen	O
for	O
a	O
few	O
seconds	O
;	O
or	O
,	O
change	O
the	O
effect	O
of	O
what	O
double-clicking	O
the	O
home	O
button	O
does	O
so	O
it	O
will	O
activate	O
Voice	B-Application
Control	I-Application
(	O
only	O
on	O
iOS	B-Application
3.x	O
;	O
on	O
iOS	B-Application
4	O
or	O
later	O
,	O
double-clicking	O
the	O
Home	O
button	O
opens	O
the	O
multitasking	O
bar	O
)	O
.	O
</s>
<s>
VoiceOver	O
,	O
Color	O
Inversion	O
,	O
and	O
Text	O
Zoom	O
were	O
introduced	O
as	O
exclusive	O
features	O
to	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
.	O
</s>
<s>
VoiceOver	O
is	O
a	O
feature	O
that	O
dictates	O
music	O
details	O
,	O
system	O
menus	O
,	O
text	O
,	O
and	O
other	O
things	O
that	O
were	O
first	O
introduced	O
on	O
the	O
third	O
generation	B-Application
iPod	B-Application
shuffle	I-Application
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
retains	O
the	O
design	O
of	O
the	O
3G	O
,	O
with	O
a	O
glossy	O
plastic	O
back	O
with	O
tapered	O
edges	O
and	O
metal	O
buttons	O
.	O
</s>
<s>
The	O
3GS	B-Operating_System
has	O
reflective	O
silver	O
text	O
on	O
the	O
reverse	O
side	O
which	O
matches	O
the	O
silver	O
Apple	O
logo	O
,	O
replacing	O
the	O
3G	O
's	O
grey	O
text	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
was	O
available	O
in	O
white	O
and	O
black	O
for	O
16GB	O
and	O
32GB	O
,	O
although	O
the	O
8GB	O
model	O
was	O
only	O
available	O
in	O
black	O
.	O
</s>
<s>
Reviews	O
of	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
have	O
been	O
mixed	O
.	O
</s>
<s>
Engadget	B-Application
also	O
said	O
that	O
"	O
the	O
additions	O
of	O
video	O
recording	O
,	O
a	O
compass	B-Language
,	O
and	O
a	O
speed	O
bump	O
just	O
do	O
n't	O
seem	O
that	O
compelling	O
to	O
us.	O
"	O
</s>
<s>
CNET	O
gave	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
4	O
out	O
of	O
5	O
stars	O
,	O
citing	O
battery	O
life	O
improvements	O
and	O
speed	O
bump	O
.	O
</s>
<s>
Engadget	B-Application
praised	O
the	O
performance	O
improvements	O
.	O
</s>
<s>
The	O
8GB	O
version	O
received	O
more	O
favorable	O
reviews	O
mainly	O
because	O
it	O
comes	O
pre-installed	O
with	O
iOS	B-Application
4	O
.	O
</s>
<s>
Jason	O
Snell	O
of	O
Macworld	O
praised	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
,	O
saying	O
that	O
"	O
the	O
device	O
's	O
internal	O
changes	O
shines	O
in	O
the	O
iOS	B-Application
4	O
update	O
,	O
making	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
a	O
worthwhile	O
upgrade	O
compared	O
to	O
its	O
predecessor	O
although	O
a	O
little	O
too	O
late	O
compared	O
to	O
the	O
iPhone	O
4.	O
"	O
</s>
<s>
TIPB	O
stated	O
that	O
"	O
aside	O
from	O
hardware-specific	O
features	O
like	O
FaceTime	O
,	O
Retina	O
Display	O
,	O
and	O
gyroscope	O
support	O
,	O
the	O
bottom	O
line	O
is	O
iPhone	B-Operating_System
3GS	I-Operating_System
users	O
are	O
getting	O
the	O
same	O
software	O
that	O
makes	O
the	O
iPhone	B-Operating_System
4	I-Operating_System
great.	O
"	O
</s>
<s>
Shortly	O
after	O
the	O
release	O
of	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
,	O
some	O
users	O
reported	O
overheating	O
of	O
the	O
device	O
while	O
in	O
heavy	O
use	O
,	O
and	O
others	O
reported	O
discoloration	O
of	O
the	O
device	O
due	O
to	O
heat	O
(	O
particularly	O
on	O
the	O
white	O
models	O
)	O
.	O
</s>
<s>
The	O
discoloration	O
issues	O
were	O
largely	O
discounted	O
as	O
being	O
as	O
a	O
result	O
of	O
iPhone	B-Operating_System
covers	O
rubbing	O
against	O
the	O
back	O
of	O
the	O
iPhone	B-Operating_System
.	O
</s>
<s>
Apple	O
responded	O
to	O
the	O
heat	O
issue	O
reports	O
by	O
warning	O
users	O
against	O
leaving	O
their	O
iPhones	B-Operating_System
in	O
a	O
car	O
on	O
a	O
hot	O
day	O
,	O
leaving	O
it	O
in	O
direct	O
sunlight	O
for	O
extended	O
periods	O
of	O
time	O
,	O
and	O
refraining	O
from	O
heavy	O
usage	O
while	O
in	O
a	O
hot/sunny	O
environment	O
.	O
</s>
<s>
It	O
is	O
also	O
worth	O
pointing	O
out	O
the	O
temperature	O
specifications	O
in	O
which	O
the	O
iPhone	B-Operating_System
should	O
be	O
operated	O
,	O
which	O
follows	O
safety	O
standards	O
in	O
the	O
countries	O
the	O
3GS	B-Operating_System
was	O
released	O
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
shipped	O
with	O
iPhone	B-Operating_System
OS	I-Operating_System
3	I-Operating_System
,	O
with	O
features	O
like	O
a	O
Digital	O
Compass	B-Language
and	O
Voice	B-Application
Control	I-Application
.	O
</s>
<s>
After	O
the	O
release	O
of	O
the	O
iPhone	B-Operating_System
4	I-Operating_System
,	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
received	O
an	O
update	O
for	O
iOS	B-Application
4	O
.	O
</s>
<s>
Unlike	O
the	O
iPhone	B-Operating_System
3G	I-Operating_System
,	O
it	O
received	O
support	O
for	O
features	O
like	O
home	O
screen	O
wallpapers	O
,	O
multitasking	O
,	O
and	O
Game	B-Operating_System
Center	I-Operating_System
.	O
</s>
<s>
The	O
iPhone	B-Operating_System
3GS	I-Operating_System
received	O
the	O
iOS	B-Application
5	O
update	O
,	O
adding	O
support	O
for	O
on-device	O
setup	O
and	O
over-the-air	O
updates	O
,	O
among	O
other	O
features	O
,	O
but	O
it	O
is	O
incompatible	O
with	O
Siri	B-Application
.	O
</s>
<s>
On	O
September	O
9	O
,	O
2009	O
,	O
Apple	O
launched	O
an	O
updated	O
model	O
of	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
that	O
patched	O
a	O
segment	O
overflow	O
in	O
the	O
SecureROM	B-General_Concept
of	O
the	O
Device	O
that	O
had	O
allowed	O
loading	O
an	O
unsigned	O
LLB	B-Application
.	O
</s>
<s>
After	O
the	O
release	O
of	O
the	O
iPhone	B-Operating_System
4S	I-Operating_System
,	O
Apple	O
updated	O
baseband	O
hardware	O
from	O
an	O
Infineon	O
Baseband	O
chip	O
to	O
a	O
Toshiba	O
Baseband	O
chip	O
in	O
week	O
2	O
production	O
in	O
2011	O
which	O
removed	O
the	O
end-user	O
'	O
s	O
ability	O
to	O
change	O
basebands	O
.	O
</s>
<s>
The	O
3GS	B-Operating_System
received	O
iOS	B-Operating_System
6	I-Operating_System
,	O
making	O
it	O
the	O
first	O
iOS	B-Application
device	O
to	O
receive	O
updates	O
for	O
four	O
major	O
iOS	B-Application
releases	O
.	O
</s>
<s>
Although	O
the	O
3GS	B-Operating_System
was	O
still	O
supported	O
,	O
some	O
major	O
features	O
of	O
iOS	B-Operating_System
6	I-Operating_System
were	O
not	O
supported	O
.	O
</s>
<s>
The	O
3GS	B-Operating_System
had	O
generally	O
positive	O
reviews	O
of	O
smooth	O
performance	O
on	O
iOS	B-Application
5	O
(	O
some	O
even	O
claim	O
better	O
performance	O
)	O
,	O
making	O
it	O
still	O
a	O
good	O
candidate	O
for	O
iOS	B-Operating_System
6	I-Operating_System
.	O
</s>
<s>
On	O
September	O
12	O
,	O
2012	O
,	O
Apple	O
announced	O
that	O
they	O
would	O
no	O
longer	O
be	O
selling	O
and	O
supporting	O
the	O
iPhone	B-Operating_System
3GS	I-Operating_System
and	O
the	O
device	O
did	O
not	O
receive	O
iOS	B-Application
7	O
,	O
due	O
to	O
hardware	O
limitations	O
.	O
</s>
