<s>
Fastboot	B-Application
is	O
a	O
communication	O
protocol	O
used	O
primarily	O
with	O
Android	B-Application
devices	O
.	O
</s>
<s>
It	O
is	O
implemented	O
in	O
a	O
command-line	B-Application
interface	I-Application
tool	O
of	O
the	O
same	O
name	O
and	O
as	O
a	O
mode	O
of	O
the	O
bootloader	B-Application
of	O
Android	B-Application
devices	O
.	O
</s>
<s>
It	O
is	O
included	O
with	O
the	O
Android	B-Application
SDK	I-Application
package	O
used	O
primarily	O
to	O
modify	O
the	O
flash	B-Device
filesystem	B-Application
via	O
a	O
USB	B-Protocol
connection	O
from	O
a	O
host	O
computer	O
.	O
</s>
<s>
It	O
requires	O
that	O
the	O
device	O
be	O
started	O
in	O
Fastboot	B-Application
mode	I-Application
.	O
</s>
<s>
If	O
the	O
mode	O
is	O
enabled	O
,	O
it	O
will	O
accept	O
a	O
specific	O
set	O
of	O
commands	O
sent	O
to	O
it	O
via	O
USB	B-Protocol
using	O
a	O
command	B-Application
line	I-Application
.	O
</s>
<s>
Fastboot	B-Application
allows	O
to	O
boot	O
from	O
a	O
custom	O
recovery	B-Application
image	O
.	O
</s>
<s>
Fastboot	B-Application
does	O
not	O
require	O
USB	B-Application
debugging	I-Application
to	O
be	O
enabled	O
on	O
the	O
device	O
.	O
</s>
<s>
Not	O
all	O
Android	B-Application
devices	O
have	O
fastboot	B-Application
enabled	O
.	O
</s>
<s>
To	O
use	O
fastboot	B-Application
,	O
a	O
specific	O
combination	O
of	O
keys	O
must	O
be	O
held	O
during	O
boot	O
.	O
</s>
<s>
Android	B-Application
device	O
manufacturers	O
are	O
allowed	O
to	O
choose	O
if	O
they	O
want	O
to	O
implement	O
fastboot	B-Application
or	O
some	O
other	O
protocol	O
.	O
</s>
<s>
The	O
keys	O
that	O
have	O
to	O
be	O
pressed	O
for	O
fastboot	B-Application
differ	O
for	O
various	O
vendors	O
.	O
</s>
<s>
On	O
Samsung	O
devices	O
,	O
(	O
excluding	O
the	O
Nexus	O
S	O
and	O
Galaxy	O
Nexus	O
devices	O
)	O
,	O
power	O
,	O
volume	O
down	O
and	O
home	O
has	O
to	O
be	O
pressed	O
for	O
entering	O
ODIN	B-Application
mode	I-Application
.	O
</s>
<s>
This	O
is	O
a	O
proprietary	O
protocol	O
,	O
and	O
tool	O
,	O
as	O
an	O
alternative	O
to	O
fastboot	B-Application
.	O
</s>
<s>
Some	O
of	O
the	O
most	O
commonly	O
used	O
fastboot	B-Application
commands	O
include	O
:	O
</s>
<s>
flash	B-Device
rewrites	O
a	O
partition	O
with	O
a	O
binary	O
image	O
stored	O
on	O
the	O
host	O
computer	O
.	O
</s>
<s>
flashing	O
unlock/oem	O
unlock	O
***	O
unlocks	O
an	O
OEM	O
locked	O
bootloader	B-Application
for	O
flashing	O
custom/unsigned	O
ROMs	O
.	O
</s>
<s>
flashing	O
lock/oem	O
lock	O
***	O
locks	O
an	O
OEM	O
unlocked	B-Application
bootloader	I-Application
.	O
</s>
<s>
reboot	O
reboots	O
the	O
device	O
into	O
either	O
the	O
main	O
operating	O
system	O
,	O
the	O
system	O
recovery	B-Application
partition	O
or	O
back	O
into	O
its	O
boot	B-Application
loader	I-Application
.	O
</s>
<s>
format	O
formats	O
a	O
specific	O
partition	O
;	O
the	O
file	B-Application
system	I-Application
of	O
the	O
partition	O
must	O
be	O
recognized	O
by	O
the	O
device	O
.	O
</s>
<s>
oem	O
device-info	O
checks	O
the	O
bootloader	B-Application
state	O
.	O
</s>
<s>
getvar	O
all	O
displays	O
all	O
information	O
about	O
device	O
(	O
IMEI	O
,	O
bootloader	B-Application
version	O
,	O
battery	O
state	O
etc	O
.	O
</s>
<s>
The	O
fastboot	B-Application
protocol	O
has	O
been	O
implemented	O
in	O
the	O
Android	B-Application
bootloader	B-Application
called	O
ABOOT	O
,	O
the	O
Little	O
Kernel	O
fork	O
of	O
Qualcomm	O
,	O
TianoCore	B-Language
EDK	I-Language
II	I-Language
,	O
and	O
Das	B-Language
U-Boot	I-Language
.	O
</s>
