<s>
The	O
Sony	B-Device
Ericsson	I-Device
Z500a	I-Device
,	O
released	O
in	O
December	O
2004	O
,	O
was	O
released	O
through	O
Cingular	O
Wireless	O
and	O
Dobson	O
Cellular	O
.	O
</s>
<s>
The	O
phone	O
has	O
push-to-talk	O
walkie-talkie	B-Application
functionality	O
,	O
but	O
the	O
handset	O
was	O
released	O
before	O
Cingular	O
had	O
rolled	O
out	O
their	O
Push	O
to	O
Talk	O
service	O
.	O
</s>
<s>
The	O
Z500a	B-Device
was	O
also	O
marketed	O
with	O
a	O
Star	O
Wars	O
Episode	O
III	O
shell	O
and	O
assorted	O
Star	O
Wars	O
ringtones	O
and	O
backgrounds	O
and	O
a	O
demo	O
game	O
that	O
could	O
be	O
downloaded	O
.	O
</s>
