<s>
The	O
two	O
handsets	O
share	O
a	O
number	O
of	O
features	O
,	O
such	O
as	O
Bluetooth	B-Protocol
,	O
IR	O
and	O
USB	B-Protocol
connectivity	O
,	O
a	O
2	O
Megapixel	O
camera	O
,	O
media	O
player	O
and	O
FM	O
radio	O
abilities	O
.	O
</s>
<s>
Although	O
both	O
phones	O
feature	O
many	O
similar	O
features	O
the	O
W710i	O
adds	O
a	O
number	O
of	O
extra	O
features	O
such	O
as	O
an	O
improved	O
'	O
Walkman	O
 '	O
MP3	B-Application
player	O
,	O
pedometer	O
functions	O
,	O
flash	B-Device
menus	O
and	O
it	O
also	O
includes	O
a	O
larger	O
memory	O
card	O
(	O
512MB	O
on	O
W710i	O
vs.	O
64MB	O
on	O
z710i	O
)	O
and	O
an	O
improved	O
stereo	O
headset	O
.	O
</s>
<s>
Media	O
Player	O
supporting	O
MP3	B-Application
,	O
AAC	B-Application
,	O
MPEG4	O
and	O
3GP	O
formats	O
.	O
</s>
<s>
An	O
isolated	O
issue	O
with	O
the	B-Application
software	I-Application
on	O
this	O
model	O
of	O
phone	O
involves	O
the	O
phone	O
's	O
integrated	O
call	O
logging	O
feature	O
.	O
</s>
<s>
The	O
remedy	O
from	O
Sony	O
Ericsson	O
is	O
for	O
the	O
phone	O
's	O
owner	O
to	O
activate	O
the	O
phone	O
's	O
built	O
in	O
software	B-Application
Master	B-General_Concept
reset	I-General_Concept
,	O
and	O
to	O
flash	B-Device
the	O
phone	O
back	O
to	O
the	O
original	O
factory	O
settings	O
every	O
time	O
the	O
random	O
error	O
occurs	O
.	O
</s>
<s>
Upon	O
doing	O
so	O
,	O
any	O
and	O
all	O
contacts	O
not	O
saved	O
to	O
the	O
SIM	O
card	O
are	O
lost	O
,	O
all	O
customizations	O
of	O
themes	O
and	O
backgrounds	O
are	O
lost	O
,	O
non-saved	O
text	O
or	O
picture	O
messages	O
are	O
lost	O
,	O
plus	O
any	O
downloaded	O
Java	B-Language
applets	O
or	O
ringtones	O
that	O
are	O
not	O
saved	O
to	O
the	O
M2	O
Micro	O
memory	O
card	O
are	O
also	O
lost	O
as	O
well	O
.	O
</s>
