<s>
The	O
Huawei	B-Device
E220	I-Device
is	O
a	O
Huawei	O
HSDPA	O
access	O
device	O
(	O
modem	B-Application
)	O
manufactured	O
by	O
Huawei	O
and	O
notable	O
for	O
using	O
the	O
USB	B-Protocol
interface	O
(	O
USB	B-Protocol
modem	B-Application
)	O
.	O
</s>
<s>
Technically	O
it	O
is	O
a	O
modem	B-Application
,	O
USB	B-Protocol
and	O
(	O
due	O
to	O
the	O
CDfs	B-Application
format	O
)	O
virtual	O
CD-ROM	B-Device
device	O
.	O
</s>
<s>
Launched	O
on	O
21	O
June	O
2006	O
,	O
the	O
device	O
is	O
used	O
for	O
wireless	O
Internet	O
access	O
using	O
3.5G	O
,	O
3G	B-Architecture
,	O
or	O
2G	O
mobile	O
telephony	O
networks	O
.	O
</s>
<s>
It	O
supports	O
UMTS	B-Protocol
(	O
including	O
HSDPA	O
)	O
,	O
EDGE	O
,	O
GPRS	B-General_Concept
and	O
GSM	O
.	O
</s>
<s>
E220	O
works	O
well	O
with	O
Linux	B-Application
,	O
as	O
support	O
for	O
it	O
was	O
added	O
in	O
Linux	B-Application
kernel	O
2.6.20	O
(	O
2007-02-04	O
)	O
,	O
but	O
there	O
are	O
workarounds	O
for	O
distributions	O
with	O
older	O
kernels	B-Operating_System
.	O
</s>
<s>
The	O
card	O
is	O
also	O
supported	O
by	O
Vodafone	O
Mobile	O
Connect	O
Card	O
driver	O
for	O
Linux	B-Application
,	O
and	O
it	O
is	O
possible	O
to	O
monitor	O
the	O
signal	O
strength	O
through	O
other	O
Linux	B-Application
applications	O
.	O
</s>
<s>
Most	O
3G	B-Architecture
network	I-Architecture
operators	O
bundle	O
the	O
device	O
with	O
a	O
contract	O
,	O
with	O
some	O
operators	O
simlocking	O
the	O
device	O
.	O
</s>
<s>
Unlocked	O
and	O
unbranded	O
modems	B-Application
can	O
also	O
be	O
bought	O
from	O
independent	O
suppliers	O
.	O
</s>
<s>
The	O
device	O
contains	O
not	O
only	O
the	O
cellular	O
antenna	O
but	O
also	O
about	O
22MB	O
(	O
10	O
MB	O
on	O
older	O
versions	O
)	O
of	O
storage	O
memory	O
accessible	O
to	O
the	O
operating	O
system	O
as	O
a	O
USB	B-Protocol
mass	O
storage	O
device	O
formatted	O
with	O
CDfs	B-Application
,	O
thus	O
emulating	O
a	O
CD-ROM	B-Device
drive	O
.	O
</s>
<s>
Huawei	O
's	O
Dashboard	O
and	O
updates	O
for	O
it	O
are	O
also	O
available	O
from	O
Huawei	O
's	O
website	O
,	O
or	O
the	O
11.313.02.00.01	O
firmware	O
for	O
7.2	O
Mbit/s	O
from	O
NetCom	O
(	O
in	O
reality	O
'	O
flashing	O
 '	O
this	O
device	O
means	O
writing	O
a	O
firmware	O
image	O
to	O
its	O
internal	O
flash	B-Device
memory	I-Device
,	O
which	O
is	O
different	O
from	O
"	O
updating	O
the	O
dashboard	O
"	O
,	O
which	O
is	O
simply	O
writing	O
a	O
new	O
CDFS	B-Application
disc	O
image	O
to	O
the	O
USB	B-Protocol
mass	O
storage	O
device	O
that	O
appears	O
in	O
the	O
operating	O
system	O
)	O
.	O
</s>
<s>
Flashing	O
the	O
firmware	O
of	O
this	O
device	O
does	O
n't	O
change	O
the	O
USB	B-Protocol
Mass	O
Storage	O
memory	O
used	O
for	O
the	O
operator	O
's	O
software	O
,	O
therefore	O
connection	O
settings	O
(	O
such	O
as	O
APN	O
)	O
will	O
be	O
retained	O
.	O
</s>
<s>
When	O
the	O
device	O
is	O
first	O
attached	O
,	O
Windows	B-Application
will	O
automatically	O
run	O
the	O
software	O
stored	O
on	O
it	O
,	O
unless	O
that	O
feature	O
has	O
been	O
turned	O
off	O
in	O
Windows	B-Application
.	O
</s>
<s>
The	O
standard	O
way	O
of	O
obtaining	O
firmware	O
updates	O
is	O
through	O
the	O
service	O
provider	O
,	O
however	O
some	O
firmware	O
updates	O
are	O
publicly	O
available	O
over	O
the	O
Internet	O
and	O
some	O
users	O
have	O
cross-flashed	O
(	O
i.e.	O
</s>
<s>
using	O
a	O
firmware	O
provided	O
by	O
service	O
provider	O
"	O
X	O
"	O
with	O
modem	B-Application
supplied	O
by	O
service	O
provider	O
"	O
Y	O
"	O
)	O
their	O
modems	B-Application
without	O
trouble	O
.	O
</s>
<s>
Updating	O
the	O
modem	B-Application
's	O
Dashboard	O
does	O
not	O
remove	O
or	O
affect	O
the	O
network-lock	O
(	O
that	O
may	O
be	O
in	O
effect	O
with	O
modems	B-Application
purchased	O
subsidized	O
from	O
a	O
service	O
provider	O
)	O
that	O
prevents	O
you	O
from	O
using	O
the	O
modem	B-Application
with	O
any	O
service	O
provider	O
.	O
</s>
<s>
However	O
updating	O
the	O
modem	B-Application
's	O
firmware	O
may	O
remove	O
this	O
network-unlock	O
or	O
even	O
the	O
opposite	O
,	O
turn	O
a	O
network-unlock	O
free	O
modem	B-Application
into	O
an	O
unlocked	O
one	O
.	O
</s>
<s>
The	O
E220	O
connects	O
to	O
the	O
computer	O
with	O
a	O
standard	O
Mini	O
USB	B-Protocol
cable	O
.	O
</s>
<s>
The	O
long	O
one	O
has	O
two	O
USB	B-Protocol
A	O
interfaces	O
,	O
one	O
used	O
for	O
data	O
and	O
power	O
and	O
the	O
other	O
optionally	O
only	O
for	O
assistance	O
power	O
in	O
case	O
the	O
computer	O
is	O
not	O
able	O
to	O
provide	O
the	O
full	O
500	O
mA	O
(	O
milliamperes	B-General_Concept
)	O
required	O
for	O
the	O
device	O
to	O
work	O
from	O
one	O
USB	B-Protocol
interface	O
only	O
.	O
</s>
<s>
If	O
the	O
connection	O
is	O
frequently	O
disrupted	O
or	O
is	O
unstable	O
(	O
or	O
usable	O
at	O
slow	O
speeds	O
only	O
)	O
,	O
the	O
two	O
plug	O
USB	B-Protocol
cable	O
should	O
be	O
used	O
instead	O
.	O
</s>
<s>
The	O
E220	O
antenna	O
is	O
internal	O
;	O
the	O
USB	B-Protocol
cable	O
does	O
not	O
act	O
as	O
an	O
antenna	O
.	O
</s>
<s>
Another	O
cheap	O
and	O
functional	O
way	O
of	O
connecting	O
an	O
external	O
antenna	O
is	O
to	O
open	O
the	O
modem	B-Application
,	O
remove	O
the	O
small	O
internal	O
antenna	O
,	O
and	O
solder	O
a	O
UMTS-antenna	O
cable	O
onto	O
the	O
board	O
,	O
though	O
this	O
invalidates	O
the	O
warranty	O
.	O
</s>
<s>
The	O
Huawei	B-Device
E220	I-Device
includes	O
its	O
own	O
Windows	B-Application
software	O
in	O
its	O
internal	O
memory	O
,	O
which	O
self-installs	O
through	O
the	O
Windows	B-Application
's	O
auto-start	O
feature	O
and	O
can	O
be	O
flashed	B-Device
(	O
overwritten	O
)	O
by	O
the	O
end	O
user	O
.	O
</s>
<s>
Since	O
the	O
release	O
of	O
Windows	B-Device
7	I-Device
users	O
have	O
reported	O
a	O
number	O
of	O
issues	O
that	O
require	O
a	O
firmware	O
upgrade	O
to	O
the	O
modem	B-Application
.	O
</s>
<s>
The	O
firmware	O
upgrade	O
must	O
be	O
carried	O
out	O
from	O
a	O
machine	O
running	O
Windows	B-Application
XP	I-Application
or	O
Windows	B-Application
Vista	I-Application
and	O
which	O
can	O
see	O
the	O
modem	B-Application
.	O
</s>
<s>
Once	O
this	O
is	O
complete	O
Windows	B-Device
7	I-Device
can	O
see	O
and	O
use	O
the	O
modem	B-Application
.	O
</s>
<s>
Swisscom	O
(	O
Switzerland	B-Protocol
)	O
,	O
</s>
<s>
Vodafone	O
-	O
Vodafone	O
puts	O
on	O
its	O
E220	O
(	O
Vodafone	B-Device
Mobile	I-Device
Connect	I-Device
USB	I-Device
Modem	I-Device
)	O
its	O
Windows	B-Application
Vodafone	O
Mobile	O
Connect	O
Lite	O
software	O
,	O
which	O
is	O
a	O
lighter	O
version	O
of	O
Vodafone	O
Mobile	O
Connect	O
.	O
</s>
<s>
In	O
Windows	B-Application
it	O
uses	O
the	O
executable	O
VodafoneUSBPP.exe	O
.	O
</s>
<s>
This	O
device	O
is	O
also	O
supported	O
in	O
Linux	B-Application
,	O
using	O
Vodafone	O
Mobile	O
Connect	O
Card	O
driver	O
for	O
Linux	B-Application
,	O
which	O
can	O
be	O
downloaded	O
from	O
Vodafone	B-Application
Betavine	I-Application
.	O
</s>
<s>
-	O
Vodafone	O
in	O
Fiji	O
markets	O
the	O
Huawei	O
Modem	B-Application
as	O
the	O
Flashnet	O
.	O
</s>
<s>
One	O
can	O
use	O
wvdial	B-Protocol
or	O
NetworkManager	B-Protocol
with	O
this	O
modem	B-Application
in	O
Linux	B-Application
.	O
</s>
