<s>
The	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
(	O
stylized	O
as	O
iPod	B-Device
touch	I-Device
)	O
is	O
a	O
discontinued	O
line	O
of	O
iOS-based	O
mobile	B-Application
devices	I-Application
designed	O
and	O
marketed	O
by	O
Apple	O
Inc	O
.	O
with	O
a	O
touchscreen-controlled	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
As	O
with	O
other	O
iPod	B-Device
models	O
,	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
can	O
be	O
used	O
as	O
a	O
portable	O
media	O
player	O
and	O
a	O
handheld	B-Application
gaming	I-Application
device	O
,	O
but	O
can	O
also	O
be	O
used	O
as	O
a	O
digital	B-Device
camera	I-Device
,	O
a	O
web	B-Application
browser	I-Application
and	O
for	O
messaging	O
.	O
</s>
<s>
It	O
is	O
similar	O
in	O
design	O
to	O
the	O
iPhone	B-Operating_System
,	O
and	O
can	O
run	O
most	O
iPhone	B-Operating_System
third-party	O
apps	O
from	O
the	O
App	B-Application
Store	I-Application
,	O
but	O
it	O
connects	O
to	O
the	O
internet	O
only	O
through	O
Wi-Fi	O
and	O
does	O
not	O
use	O
cellular	O
network	O
data	O
.	O
</s>
<s>
The	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
was	O
introduced	O
in	O
2007	O
,	O
and	O
some	O
100	O
million	O
units	O
were	O
sold	O
by	O
May	O
2013	O
.	O
</s>
<s>
The	O
final	O
generation	O
of	O
iPod	B-Device
Touch	I-Device
,	O
released	O
on	O
May	O
28	O
,	O
2019	O
,	O
is	O
the	O
seventh-generation	B-Operating_System
model	I-Operating_System
.	O
</s>
<s>
iPod	B-Device
Touch	I-Device
models	O
were	O
sold	O
by	O
storage	O
space	O
and	O
color	O
;	O
all	O
models	O
of	O
the	O
same	O
generation	O
typically	O
offered	O
identical	O
features	O
,	O
performance	O
,	O
and	O
operating	B-General_Concept
system	I-General_Concept
upgrades	O
.	O
</s>
<s>
An	O
exception	O
was	O
the	O
fifth	B-Operating_System
generation	I-Operating_System
,	O
in	O
which	O
the	O
low-end	O
(	O
16GB	O
)	O
model	O
was	O
initially	O
sold	O
without	O
a	O
rear-facing	O
camera	O
and	O
in	O
a	O
single	O
color	O
.	O
</s>
<s>
The	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
was	O
the	O
last	O
product	O
in	O
Apple	O
's	O
iPod	B-Device
product	O
line	O
after	O
the	O
discontinuation	O
of	O
the	B-Device
iPod	I-Device
Nano	O
and	O
iPod	B-Application
Shuffle	I-Application
on	O
July	O
27	O
,	O
2017	O
,	O
after	O
which	O
Apple	O
revised	O
the	O
storage	O
and	O
pricing	O
for	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
with	O
32	O
and	O
128GB	O
of	O
storage	O
.	O
</s>
<s>
On	O
May	O
10	O
,	O
2022	O
,	O
Apple	O
discontinued	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
,	O
effectively	O
ending	O
the	B-Device
iPod	I-Device
product	O
line	O
as	O
a	O
whole	O
.	O
</s>
<s>
Apple	O
dropped	O
support	O
for	O
the	O
seventh-generation	O
iPod	B-Device
Touch	I-Device
following	O
the	O
release	O
of	O
iOS	B-Operating_System
16	I-Operating_System
,	O
ending	O
software	O
support	O
for	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
lineup	O
and	O
the	B-Device
iPod	I-Device
product	O
line	O
as	O
a	O
whole	O
.	O
</s>
<s>
The	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
ran	O
on	O
iOS	B-Application
,	O
the	O
same	O
operating	B-General_Concept
system	I-General_Concept
as	O
the	O
iPhone	B-Operating_System
.	O
</s>
<s>
Users	O
type	O
on	O
a	O
virtual	B-Device
keyboard	I-Device
displayed	O
on	O
the	O
screen	B-Device
.	O
</s>
<s>
Apple	O
operates	O
online	O
stores	B-Application
,	O
allowing	O
users	O
to	O
buy	O
and	O
directly	O
download	O
music	O
,	O
videos	O
and	O
third-party	O
software	O
.	O
</s>
<s>
From	O
launch	O
,	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
was	O
described	O
by	O
journalists	O
as	O
an	O
"	O
iPhone	B-Operating_System
without	O
the	O
phone	O
"	O
,	O
and	O
each	O
iPod	B-Device
Touch	I-Device
model	O
to	O
date	O
has	O
been	O
introduced	O
with	O
the	O
same	O
release	O
of	O
iOS	B-Application
as	O
the	O
contemporary	O
iPhone	B-Operating_System
model	O
.	O
</s>
<s>
In	O
June	O
2011	O
,	O
iOS	B-Operating_System
5	I-Operating_System
,	O
the	O
fifth	B-Operating_System
major	O
release	O
of	O
iOS	B-Application
software	O
,	O
was	O
announced	O
at	O
Apple	O
's	O
WWDC	O
2011	O
,	O
which	O
added	O
notification	O
,	O
messaging	O
and	O
reminder	O
features	O
.	O
</s>
<s>
Apple	O
limited	O
some	O
features	O
,	O
most	O
notably	O
the	O
voice	B-Application
control	I-Application
system	O
Siri	B-Application
,	O
to	O
the	O
iPhone	B-Operating_System
.	O
</s>
<s>
iOS	B-Operating_System
6	I-Operating_System
,	O
which	O
was	O
released	O
on	O
September	O
19	O
,	O
2012	O
for	O
the	O
fourth	O
and	O
fifth	B-Operating_System
generation	I-Operating_System
iPod	B-Device
Touch	I-Device
models	O
,	O
contains	O
200	O
new	O
features	O
including	O
Passbook	B-Operating_System
,	O
Facebook	B-Application
integration	O
and	O
Apple	B-Application
Maps	I-Application
.	O
</s>
<s>
The	O
fifth	B-Operating_System
generation	I-Operating_System
iPod	B-Device
Touch	I-Device
gained	O
the	O
ability	O
to	O
take	O
panoramic	O
photos	O
,	O
a	O
feature	O
shared	O
with	O
the	O
iPhone	B-Operating_System
4S	I-Operating_System
and	O
iPhone	B-Operating_System
5	I-Operating_System
.	O
</s>
<s>
On	O
June	O
8	O
,	O
2015	O
,	O
it	O
was	O
announced	O
at	O
the	O
WWDC	O
that	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
fifth	B-Operating_System
generation	I-Operating_System
would	O
support	O
iOS	B-Operating_System
9	I-Operating_System
,	O
along	O
with	O
other	O
A5	O
Chip	O
devices	O
.	O
</s>
<s>
This	O
makes	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
fifth	B-Operating_System
generation	I-Operating_System
the	O
first	O
iPod	B-Device
Touch	I-Device
to	O
support	O
four	O
major	O
versions	O
of	O
iOS	B-Application
.	O
</s>
<s>
Early	O
iOS	B-Application
updates	O
prior	O
to	O
iOS	B-Operating_System
4	I-Operating_System
have	O
been	O
paid	O
for	O
owners	O
of	O
supported	O
iPod	B-Device
Touch	I-Device
models	O
.	O
</s>
<s>
Apple	O
received	O
criticism	O
for	O
this	O
decision	O
and	O
for	O
excluding	O
certain	O
features	O
from	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
software	O
that	O
the	O
iPhone	B-Operating_System
included	O
.	O
</s>
<s>
Apple	O
's	O
position	O
was	O
that	O
they	O
could	O
add	O
features	O
for	O
free	O
to	O
the	O
iPhone	B-Operating_System
because	O
the	O
revenue	O
from	O
it	O
is	O
accounted	O
for	O
on	O
a	O
subscription	O
basis	O
under	O
accounting	O
rules	O
,	O
rather	O
than	O
as	O
a	O
one	O
time	O
payment	O
(	O
as	O
iPhones	B-Operating_System
were	O
often	O
sold	O
with	O
a	O
carrier	O
contract	O
)	O
.	O
</s>
<s>
At	O
WWDC	O
in	O
June	O
2010	O
,	O
as	O
of	O
iOS	B-Operating_System
4	I-Operating_System
,	O
Steve	O
Jobs	O
announced	O
that	O
Apple	O
had	O
"	O
found	O
a	O
way	O
"	O
to	O
make	O
subsequent	O
OS	O
upgrades	O
available	O
free	O
to	O
iPod	B-Device
Touch	I-Device
owners	O
.	O
</s>
<s>
iPod	B-Device
Touch	I-Device
units	O
running	O
iOS	B-Operating_System
4	I-Operating_System
or	O
earlier	O
require	O
a	O
Mac	O
or	O
PC	O
to	O
be	O
set	O
up	O
for	O
the	O
first	O
time	O
.	O
</s>
<s>
Downloading	O
apps	O
or	O
media	O
from	O
the	O
iTunes	O
Store	O
and	O
App	B-Application
Store	I-Application
does	O
not	O
require	O
a	O
computer	O
,	O
though	O
media	O
not	O
purchased	O
through	O
the	O
iTunes	O
Store	O
still	O
has	O
to	O
be	O
added	O
through	O
a	O
computer	O
.	O
</s>
<s>
New	O
iPods	B-Device
bought	O
after	O
October	O
12	O
,	O
2011	O
have	O
iOS	B-Operating_System
5.0	I-Operating_System
or	O
later	O
preloaded	O
,	O
and	O
can	O
be	O
set	O
up	O
wirelessly	O
,	O
without	O
the	O
need	O
of	O
a	O
PC	O
or	O
Mac	O
.	O
</s>
<s>
To	O
purchase	O
content	O
on	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
,	O
the	O
user	O
must	O
create	O
an	O
Apple	B-General_Concept
ID	I-General_Concept
or	O
have	O
an	O
existing	O
account	O
.	O
</s>
<s>
With	O
this	O
account	O
one	O
may	O
download	O
music	O
and	O
videos	O
from	O
the	O
iTunes	O
Store	O
,	O
apps	O
from	O
the	O
App	B-Application
Store	I-Application
,	O
or	O
books	O
from	O
the	O
Apple	B-Application
Books	I-Application
Store	O
.	O
</s>
<s>
An	O
Apple	B-General_Concept
ID	I-General_Concept
account	O
created	O
without	O
a	O
credit	O
card	O
can	O
be	O
used	O
to	O
get	O
free	O
content	O
,	O
and	O
gift	O
cards	O
can	O
be	O
used	O
to	O
pay	O
for	O
apps	O
instead	O
of	O
using	O
a	O
credit	O
card	O
.	O
</s>
<s>
The	O
only	O
official	O
way	O
to	O
obtain	O
third-party	O
applications	O
for	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
is	O
through	O
Apple	B-Application
's	I-Application
App	I-Application
Store	I-Application
,	O
which	O
is	O
a	O
branch	O
of	O
iTunes	O
Store	O
.	O
</s>
<s>
The	O
App	B-Application
Store	I-Application
application	O
,	O
available	O
in	O
all	O
versions	O
of	O
iOS	B-Application
from	O
2.0	O
onwards	O
,	O
allows	O
users	O
to	O
browse	O
and	O
download	O
applications	O
from	O
a	O
single	O
online	O
repository	O
(	O
hosted	O
by	O
Apple	O
)	O
with	O
the	O
iTunes	O
Store	O
.	O
</s>
<s>
Sideloading	O
apps	O
outside	O
the	O
App	B-Application
Store	I-Application
is	O
done	O
through	O
the	O
Xcode	B-Operating_System
application	O
,	O
and	O
is	O
intended	O
for	O
developers	O
and	O
enterprises	O
,	O
though	O
tools	O
for	O
sideloading	O
outside	O
of	O
Xcode	B-Operating_System
exist	O
,	O
and	O
are	O
mainly	O
used	O
for	O
applications	O
not	O
allowed	O
in	O
the	O
App	B-Application
Store	I-Application
.	O
</s>
<s>
The	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
is	O
generally	O
similar	O
to	O
the	O
iPhone	B-Operating_System
models	O
prior	O
to	O
the	O
iPhone	B-Operating_System
X	O
(	O
excluding	O
the	O
second	O
and	O
third	O
generation	O
iPhone	B-Operating_System
SE	O
)	O
.	O
</s>
<s>
Compared	O
to	O
a	O
same-generation	O
iPhone	B-Operating_System
,	O
an	O
iPod	B-Device
Touch	I-Device
is	O
thinner	O
,	O
lighter	O
and	O
less	O
expensive	O
,	O
while	O
lacking	O
some	O
hardware	O
and	O
software	O
features	O
.	O
</s>
<s>
Steve	O
Jobs	O
once	O
referred	O
to	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
as	O
"	O
training	O
wheels	O
for	O
the	O
iPhone	B-Operating_System
"	O
.	O
</s>
<s>
All	O
iPod	B-Device
Touch	I-Device
models	O
lack	O
biometric	O
authentication	O
,	O
3D	O
Touch	O
,	O
NFC	O
,	O
GPS	O
,	O
an	O
earpiece	O
speaker	O
and	O
a	O
noise-cancelling	B-Algorithm
microphone	I-Algorithm
.	O
</s>
<s>
Depending	O
on	O
the	O
generation	O
,	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
may	O
have	O
a	O
smaller	O
or	O
otherwise	O
inferior	O
display	O
and	O
camera(s )	O
.	O
</s>
<s>
The	O
first	O
generation	O
iPod	B-Device
Touch	I-Device
lacks	O
a	O
built-in	O
speaker	O
,	O
and	O
the	O
first	O
,	O
second	O
,	O
and	O
third	O
generation	O
iPod	B-Device
Touch	I-Device
lack	O
a	O
microphone	O
,	O
a	O
camera	O
,	O
and	O
a	O
flash	O
.	O
</s>
<s>
Starting	O
with	O
the	O
4th	B-Operating_System
generation	I-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
,	O
a	O
camera	O
and	O
microphone	O
were	O
added	O
,	O
and	O
starting	O
with	O
the	O
5th	B-Operating_System
generation	I-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
,	O
an	O
LED	O
flash	O
was	O
added	O
.	O
</s>
<s>
The	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
has	O
no	O
cellular	O
modem	O
,	O
and	O
therefore	O
cannot	O
directly	O
make	O
phone	O
calls	O
on	O
the	O
public	O
switched	O
telephone	O
network	O
.	O
</s>
<s>
However	O
,	O
it	O
can	O
make	O
VoIP	O
calls	O
such	O
as	O
FaceTime	B-Operating_System
,	O
and	O
send	O
iMessages	O
to	O
other	O
iPhones	B-Operating_System
,	O
Macs	B-Device
,	O
iPads	B-Device
,	O
and	O
iPod	B-Device
Touch	I-Device
models	O
with	O
an	O
Apple	B-General_Concept
ID	I-General_Concept
.	O
</s>
<s>
The	O
5th	B-Operating_System
generation	I-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
and	O
later	O
can	O
forward	O
and	O
receive	O
standard	O
phone	O
calls	O
through	O
a	O
separate	O
iPhone	B-Operating_System
(	O
a	O
feature	O
introduced	O
in	O
iOS	B-Operating_System
8	I-Operating_System
)	O
,	O
with	O
the	O
Wi-Fi	O
Calling	O
feature	O
.	O
</s>
<s>
The	O
two	O
devices	O
must	O
be	O
linked	O
to	O
the	O
same	O
Apple	B-General_Concept
ID	I-General_Concept
,	O
and	O
the	O
iPhone	B-Operating_System
's	O
carrier	O
must	O
support	O
this	O
feature	O
.	O
</s>
<s>
The	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
can	O
communicate	O
with	O
a	O
computer	O
through	O
Wi-Fi	O
or	O
USB	B-Protocol
using	O
a	O
cable	O
and	O
a	O
dock	B-Operating_System
connector	I-Operating_System
.	O
</s>
<s>
iPod	B-Device
models	O
released	O
before	O
2012	O
feature	O
a	O
30-pin	O
dock	B-Operating_System
connector	I-Operating_System
(	O
known	O
colloquially	O
as	O
the	B-Device
iPod	I-Device
dock	B-Operating_System
connector	I-Operating_System
)	O
,	O
which	O
carried	O
analog	O
signals	O
.	O
</s>
<s>
The	O
fifth	B-Operating_System
,	O
sixth	B-Operating_System
,	O
and	O
seventh	B-Operating_System
generations	O
of	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
feature	O
a	O
new	O
digital	O
dock	B-Operating_System
connector	I-Operating_System
,	O
called	O
Lightning	B-Architecture
,	O
which	O
was	O
introduced	O
alongside	O
the	O
iPhone	B-Operating_System
5	I-Operating_System
,	O
fourth	B-Device
generation	I-Device
iPad	I-Device
and	O
first	B-Device
generation	I-Device
iPad	I-Device
Mini	I-Device
,	O
and	O
the	O
seventh	B-Operating_System
generation	O
iPod	B-Device
Nano	I-Device
models	O
.	O
</s>
<s>
Various	O
accessories	O
are	O
available	O
to	O
connect	O
the	O
Apple	B-Architecture
Lightning	B-Architecture
connector	I-Architecture
to	O
the	O
older	O
30-pin	O
dock	B-Operating_System
connector	I-Operating_System
or	O
USB	B-Protocol
,	O
although	O
not	O
all	O
old	O
accessories	O
will	O
work	O
,	O
because	O
the	O
Lightning	B-Architecture
connector	I-Architecture
cannot	O
handle	O
analog	O
signals	O
.	O
</s>
<s>
Like	O
all	O
of	O
Apple	O
's	O
iOS	B-Operating_System
devices	I-Operating_System
,	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
is	O
a	O
tightly	O
controlled	O
or	O
closed	B-Application
platform	I-Application
.	O
</s>
<s>
Hackers	O
have	O
attempted	O
to	O
"	O
jailbreak	B-Application
"	O
all	O
iOS	B-Operating_System
devices	I-Operating_System
to	O
enable	O
forbidden	O
or	O
unsupported	O
features	O
,	O
such	O
as	O
multitasking	O
in	O
iOS	B-Application
versions	O
before	O
4.0	O
,	O
themes	O
for	O
the	O
home	O
screen	B-Device
,	O
and	O
enabling	O
the	O
battery-percentage	O
indicator	O
(	O
limited	O
to	O
the	O
iPhone	B-Operating_System
prior	O
to	O
the	O
seventh	B-Operating_System
generation	O
iPod	B-Device
Touch	I-Device
)	O
.	O
</s>
<s>
Jailbreaks	B-Application
for	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
first	O
surfaced	O
a	O
month	O
after	O
the	O
original	O
model	O
was	O
released	O
in	O
September	O
2007	O
,	O
when	O
hackers	O
released	O
JailbreakMe	B-Operating_System
1.0	O
(	O
also	O
called	O
"	O
AppSnapp	O
"	O
)	O
to	O
jailbreak	B-Application
iPhone	I-Application
OS	O
1.1.1	O
.	O
</s>
<s>
This	O
allowed	O
users	O
to	O
install	O
third-party	O
programs	O
on	O
their	O
devices	O
before	O
Apple	O
permitted	O
this	O
with	O
iPhone	B-Operating_System
OS	I-Operating_System
2	I-Operating_System
.	O
</s>
<s>
Apple	O
's	O
warranty	O
statement	O
implies	O
that	O
an	O
iPod	B-Device
Touch	I-Device
after	O
jailbreaking	B-Application
or	O
other	O
modification	O
made	O
by	O
unofficial	O
means	O
is	O
not	O
covered	O
by	O
Apple	O
's	O
warranty	O
.	O
</s>
<s>
Jailbreaking	B-Application
is	O
a	O
violation	O
of	O
the	O
terms	O
and	O
conditions	O
for	O
using	O
iOS	B-Application
.	O
</s>
<s>
While	O
the	O
jailbreaking	B-Application
process	O
can	O
normally	O
be	O
undone	O
by	O
performing	O
a	O
restore	O
through	O
iTunes	O
,	O
there	O
is	O
a	O
risk	O
of	O
rendering	O
the	O
device	O
unusable	O
.	O
</s>
<s>
Upon	O
launch	O
in	O
2007	O
the	O
first	O
generation	O
iPod	B-Device
Touch	I-Device
received	O
mostly	O
good	O
reviews	O
for	O
its	O
display	O
,	O
its	O
full	O
Web	B-Application
browser	I-Application
,	O
and	O
YouTube	O
support	O
.	O
</s>
<s>
However	O
it	O
was	O
also	O
criticized	O
for	O
being	O
a	O
"	O
stripped	O
down	O
"	O
iPhone	B-Operating_System
,	O
for	O
lacking	O
external	O
volume	O
buttons	O
,	O
and	O
for	O
having	O
a	O
lower-quality	O
display	O
.	O
</s>
<s>
Notable	O
competing	O
products	O
as	O
of	O
2009	O
included	O
Creative	O
's	O
ZEN	O
X-Fi2	O
,	O
Sony	O
's	O
Walkman	O
X	O
Series	O
,	O
and	O
Microsoft	O
's	O
Zune	O
HD	O
;	O
and	O
as	O
of	O
2011	O
,	O
the	O
Samsung	B-Application
Galaxy	I-Application
Player	I-Application
and	O
Sony	O
Walkman	O
Z	O
Series	O
.	O
</s>
<s>
Later	O
models	O
received	O
a	O
more	O
lukewarm	O
reception	O
,	O
with	O
reviewers	O
questioning	O
whether	O
an	O
iPod	B-Device
Touch	I-Device
made	O
sense	O
as	O
a	O
product	O
in	O
a	O
time	O
where	O
smartphones	O
had	O
become	O
more	O
affordable	O
.	O
</s>
<s>
In	O
May	O
2022	O
,	O
Apple	O
announced	O
that	O
after	O
over	O
20	O
years	O
,	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
,	O
and	O
the	B-Device
iPod	I-Device
line	O
as	O
a	O
whole	O
,	O
were	O
to	O
be	O
discontinued	O
;	O
the	B-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
would	O
remain	O
available	O
only	O
while	O
supplies	O
last	O
.	O
</s>
