<s>
Messages	O
(	O
formerly	O
known	O
as	O
Android	B-Protocol
Messages	I-Protocol
)	O
is	O
an	O
SMS	B-Device
,	O
RCS	O
,	O
and	O
instant	O
messaging	O
application	O
developed	O
by	O
Google	B-Application
for	O
its	O
Android	B-Application
and	O
WearOS	B-Application
mobile	O
operating	O
systems	O
,	O
while	O
it	O
's	O
also	O
available	O
via	O
the	O
Web	B-Application
.	O
</s>
<s>
Messages	O
is	O
Google	B-Application
's	I-Application
official	O
universal	O
messaging	O
platform	O
for	O
the	O
Android	B-Application
ecosystem	O
,	O
similar	O
to	O
the	O
implementation	O
of	O
iMessage	O
on	O
Apple	O
devices	O
.	O
</s>
<s>
The	O
original	O
code	O
for	O
Android	B-Application
SMS	B-Device
messaging	O
was	O
released	O
in	O
2009	O
integrated	O
into	O
the	O
Operating	O
System	O
.	O
</s>
<s>
It	O
was	O
released	O
as	O
a	O
standalone	O
application	O
independent	O
of	O
Android	B-Application
with	O
the	O
release	O
of	O
Android	B-Application
5.0	I-Application
Lollipop	I-Application
in	O
2014	O
,	O
replacing	O
Google	B-Protocol
Hangouts	I-Protocol
as	O
the	O
default	O
SMS	B-Device
app	O
on	O
Google	B-Device
's	I-Device
Nexus	I-Device
line	O
of	O
phones	O
.	O
</s>
<s>
This	O
was	O
in	O
preparation	O
for	O
when	O
Google	B-Application
launched	O
messages	O
for	O
web	B-Application
.	O
</s>
<s>
In	O
December	O
2019	O
,	O
Google	B-Application
rolled	O
out	O
support	O
for	O
RCS	O
messaging	O
(	O
under	O
the	O
name	O
chat	O
features	O
)	O
in	O
the	O
United	O
States	O
,	O
United	O
Kingdom	O
,	O
France	O
and	O
Mexico	O
.	O
</s>
<s>
In	O
June	O
2021	O
,	O
Google	B-Application
introduced	O
end-to-end	O
encryption	O
in	O
Messages	O
by	O
default	O
using	O
the	O
Signal	B-Protocol
Protocol	I-Protocol
,	O
for	O
all	O
one-to-one	O
RCS-based	O
conversations	O
,	O
and	O
for	O
all	O
group	O
chats	O
in	O
December	O
2022	O
for	O
beta	O
users	O
,	O
with	O
plans	O
for	O
full	O
release	O
in	O
early	O
2023	O
.	O
</s>
<s>
Beginning	O
with	O
the	O
Samsung	B-Application
Galaxy	I-Application
S21	I-Application
,	O
Messages	O
replaces	O
Samsung	O
's	O
in-house	O
Messages	O
app	O
as	O
the	O
default	O
messaging	O
app	O
for	O
One	B-Application
UI	I-Application
in	O
selected	O
markets	O
.	O
</s>
<s>
Some	O
of	O
the	O
most	O
important	O
features	O
in	O
Google	B-Protocol
Messages	I-Protocol
are	O
:	O
</s>
<s>
Send	O
instant	O
text	O
and	O
voice	O
messages	O
in	O
1:1	O
or	O
group	O
chat	O
conversations	O
over	O
mobile	O
data	O
and	O
Wi-Fi	O
,	O
via	O
Android	B-Application
,	O
WearOS	B-Application
or	O
the	O
.	O
</s>
<s>
Tight	O
integration	O
with	O
the	B-Application
Google	I-Application
ecosystem	O
,	O
e.g.	O
</s>
<s>
Google	B-Application
Calendar	I-Application
,	O
Meet	B-Protocol
,	O
Maps	B-Application
,	O
YouTube	B-General_Concept
,	O
Photos	B-Algorithm
,	O
Contacts	O
,	O
Assistant	B-Application
,	O
Search	B-Application
,	O
Safe	B-Application
Browsing	I-Application
etc	O
.	O
</s>
<s>
Web	B-Application
interface	O
:	O
The	O
messages	O
app	O
can	O
be	O
used	O
in	O
a	O
different	O
device	O
browser	O
tab	O
.	O
</s>
<s>
To	O
activate	O
this	O
feature	O
,	O
the	O
user	O
has	O
to	O
visit	O
the	O
webpage	O
and	O
scan	O
the	O
QR	O
code	O
that	O
is	O
shown	O
in	O
the	O
web	B-Application
with	O
the	O
smartphone	O
,	O
by	O
using	O
that	O
feature	O
in	O
the	O
Messages	O
app	O
.	O
</s>
