<s>
The	O
Palm	B-Application
Centro	I-Application
is	O
a	O
smartphone	B-Application
marketed	O
by	O
Palm	O
,	O
Inc	O
.	O
beginning	O
its	O
release	O
on	O
October	O
14	O
,	O
2007	O
offering	O
the	O
functionality	O
of	O
the	O
larger	O
Treo	B-Application
755p	I-Application
in	O
a	O
smaller	O
size	O
.	O
</s>
<s>
The	O
Centro	O
is	O
one	O
of	O
the	O
last	O
devices	O
to	O
run	O
the	O
Palm	B-Operating_System
OS	I-Operating_System
operating	O
system	O
.	O
</s>
<s>
The	O
successor	O
to	O
Palm	B-Operating_System
OS	I-Operating_System
is	O
webOS	B-Operating_System
,	O
which	O
debuted	O
on	O
the	O
Palm	B-Application
Pre	I-Application
in	O
June	O
2009	O
.	O
</s>
<s>
Once	O
Verizon	B-Application
's	O
3G	B-Architecture
network	I-Architecture
is	O
shut	O
down	O
,	O
Verizon	B-Application
Centro	O
devices	O
will	O
only	O
work	O
offline	O
.	O
</s>
<s>
With	O
a	O
weight	O
of	O
119	O
g	O
,	O
and	O
dimensions	O
of	O
4.2	O
″	O
(	O
h	O
)	O
,	O
2.1	O
″	O
(	O
w	O
)	O
and	O
0.7	O
″	O
(	O
d	O
)	O
,	O
the	O
Centro	O
was	O
the	O
smallest-ever	O
Palm	O
smartphone	B-Application
at	O
the	O
time	O
of	O
its	O
introduction	O
.	O
</s>
<s>
It	O
includes	O
a	O
1.3-megapixel	O
digital	O
camera	O
with	O
video	O
capture	O
capabilities	O
,	O
microSD	O
card	O
slot	O
(	O
officially	O
supporting	O
up	O
to	O
8	O
GB	O
microSD	O
cards	O
,	O
though	O
in	O
practice	O
,	O
microSD	O
cards	O
up	O
to	O
64	O
GB	O
work	O
)	O
,	O
touch	B-Device
screen	I-Device
navigation	O
and	O
a	O
QWERTY	O
keyboard	O
.	O
</s>
<s>
The	O
phone	O
is	O
available	O
with	O
either	O
CDMA	B-Protocol
technology	O
supporting	O
EVDO	O
Rev	O
0	O
for	O
network	O
access	O
,	O
or	O
GSM	O
.	O
</s>
<s>
An	O
AC	O
travel	O
charger	O
and	O
a	O
USB	B-Protocol
data	O
cable	O
are	O
Included	O
with	O
the	O
phone	O
.	O
</s>
<s>
The	O
Palm	B-Application
Centro	I-Application
also	O
had	O
support	O
for	O
(	O
Java	O
)	O
MIDP	O
2.0	O
,	O
though	O
Palm	O
has	O
discontinued	O
distributing	O
it	O
for	O
licensing	O
reasons	O
.	O
</s>
<s>
The	O
product	O
SKU	O
on	O
this	O
model	O
was	O
PTR690HK	O
,	O
which	O
is	O
aligned	O
with	O
products	O
in	O
the	O
Trēo	O
family	O
of	O
Palm	O
smartphones	B-Application
.	O
</s>
<s>
The	O
Verizon	B-Application
Wireless	I-Application
SKU	O
was	O
CENTRO690P	O
.	O
</s>
<s>
The	O
Centro	O
runs	O
Palm	B-Operating_System
OS	I-Operating_System
5.4.9	I-Operating_System
.	O
</s>
<s>
Because	O
of	O
the	O
backward	B-General_Concept
compatibility	I-General_Concept
features	O
included	O
in	O
Palm	B-Operating_System
OS	I-Operating_System
,	O
most	O
applications	O
released	O
for	O
older	O
Palm	O
devices	O
also	O
work	O
with	O
the	O
Centro	O
.	O
</s>
<s>
It	O
uses	O
the	O
GSM	O
cellular	O
network	O
for	O
connectivity	O
and	O
does	O
have	O
some	O
differences	O
from	O
Sprint	O
's	O
CDMA	B-Protocol
version	O
.	O
</s>
<s>
Even	O
though	O
the	O
Sprint	O
and	O
Verizon	B-Application
versions	O
of	O
the	O
Centro	O
support	O
3G	B-Architecture
(	O
EV-DO	O
)	O
,	O
the	O
AT&T	O
version	O
does	O
not	O
;	O
it	O
is	O
a	O
2G-only	O
device	O
.	O
</s>
<s>
Nonetheless	O
,	O
the	O
low	O
price	O
makes	O
it	O
a	O
good	O
first	O
smartphone.	O
"	O
</s>
<s>
The	O
AT&T	O
Centro	O
also	O
offers	O
a	O
Push-To-Talk	O
walkie-talkie-like	O
service	O
not	O
available	O
on	O
the	O
CDMA	B-Protocol
device	O
.	O
</s>
<s>
The	O
Verizon	B-Application
version	O
of	O
the	O
Centro	O
,	O
available	O
in	O
dark	O
blue	O
only	O
,	O
was	O
released	O
on	O
June	O
12	O
,	O
2008	O
for	O
$99	O
with	O
a	O
two-year	O
contract	O
and	O
a	O
$70	O
mail	O
in	O
rebate	O
.	O
</s>
<s>
0	O
)	O
3G	B-Architecture
network	I-Architecture
.	O
</s>
<s>
Good	O
Gear	O
Guide	O
writes	O
:	O
"	O
The	O
first	O
smartphone	B-Application
with	O
a	O
full	O
QWERTY	O
keyboard	O
to	O
be	O
sold	O
in	O
Australia	O
on	O
pre-paid	O
"	O
.	O
</s>
<s>
Rogers	O
Wireless	O
(	O
Canada	O
)	O
announced	O
that	O
it	O
would	O
be	O
carrying	O
the	O
Palm	B-Application
Centro	I-Application
as	O
of	O
June	O
10	O
,	O
2008	O
.	O
</s>
<s>
As	O
of	O
February	O
2	O
,	O
2009	O
,	O
a	O
CDMA	B-Protocol
version	O
of	O
the	O
Palm	B-Application
Centro	I-Application
in	O
Midnight	O
Black	O
was	O
released	O
on	O
the	O
Bell	O
Mobility	O
network	O
.	O
</s>
<s>
0	O
)	O
3G	B-Architecture
network	I-Architecture
.	O
</s>
<s>
According	O
to	O
AdMob	B-Application
,	O
as	O
of	O
August	O
2008	O
,	O
the	O
Palm	B-Application
Centro	I-Application
was	O
the	O
second-ranked	O
US	O
smartphone	B-Application
based	O
on	O
internet	O
traffic	O
,	O
responsible	O
for	O
78%	O
of	O
the	O
traffic	O
on	O
Palm	O
devices	O
;	O
it	O
fell	O
to	O
fourth	O
in	O
February	O
2009	O
,	O
responsible	O
for	O
86%	O
of	O
Palm	O
traffic	O
.	O
</s>
