<s>
The	O
landscape	O
for	O
instant	B-Application
messaging	I-Application
involves	O
cross-platform	O
instant	B-Application
messaging	I-Application
clients	O
that	O
can	O
handle	O
one	O
or	O
multiple	O
protocols	O
.	O
</s>
<s>
The	O
following	O
table	O
compares	O
general	O
and	O
technical	O
information	O
for	O
cross-platform	O
instant	B-Application
messaging	I-Application
clients	O
in	O
active	O
development	O
,	O
each	O
of	O
which	O
have	O
their	O
own	O
article	O
that	O
provide	O
further	O
information	O
.	O
</s>
<s>
Some	O
messaging	O
services	O
that	O
do	O
not	O
solely	O
focus	O
on	O
a	O
mobile-first	O
experience	O
,	O
or	O
enforce	O
SMS	B-Device
authentication	O
,	O
may	O
allow	O
email	O
addresses	O
to	O
be	O
used	O
for	O
sign-up	O
instead	O
.	O
</s>
<s>
Client	O
Hide	O
number	O
in	O
chats	O
Account	O
expiration	O
Reset	O
password	O
Password	O
lockout	O
Search	O
for	O
contacts	O
Lock	O
screen	O
timeout	O
Lock	O
screen	O
when	O
closed	O
Lock	O
screen	O
button	O
Screenshot	O
detection	O
Screenshot/recording	O
disabled	O
(	O
Android	B-Application
only	O
)	O
Voice	O
changer	O
Plugins	B-Application
Briar	B-Protocol
by	O
public	O
key	O
or	O
in-person	O
pairing	O
Discord	B-Application
•Username	O
&	O
Discord	B-Application
Tag	O
•Phonebook	O
contacts	O
scanning	O
if	O
enabled	O
Element	B-Protocol
•Username	O
•Matrix	O
ID	O
Fractal	B-Language
•Username	O
•Matrix	O
ID	O
Gadu-Gadu	B-Application
Gajim	B-Language
Google	B-Application
Chat	I-Application
•Email	O
address	O
Google	B-Protocol
Messages	I-Protocol
(	O
RCS	O
)	O
•Phone	O
number	O
ICQ	B-Protocol
Jami	B-Protocol
by	O
random	O
identifier	O
or	O
email-like	O
address	O
Jitsi	B-Protocol
by	O
shared	O
4-random-words	O
URL	O
KakaoTalk	B-Protocol
Kik	B-Protocol
Messenger	I-Protocol
•Username	O
•Phonebook	O
contacts	O
scanning	O
if	O
enabled	O
Line	B-Application
•Username	O
•Phone	O
number	O
•Phonebook	O
contacts	O
scanning	O
if	O
enabled	O
(	O
sending	O
friend	O
requests	O
are	O
required	O
)	O
Linphone	B-Protocol
Mattermost	B-Protocol
Messages	O
(	O
Apple	O
)	O
•Email	O
address	O
•Phone	O
number	O
Messenger	B-Protocol
•Facebook	O
profile	O
•Username	O
URL	O
•Phone	O
number	O
•Phonebook	O
contacts	O
scanning	O
if	O
enabled	O
Movim	B-Protocol
?	O
</s>
<s>
1	O
:	O
Apple	O
iOS	B-Application
does	O
n't	O
allow	O
screenshot	O
protection	O
.	O
</s>
<s>
Examples	O
of	O
such	O
messaging	O
services	O
include	O
:	O
WhatsApp	B-Application
,	O
Viber	B-Application
,	O
Line	B-Application
,	O
WeChat	B-Application
,	O
Signal	B-Application
,	O
etc	O
.	O
</s>
<s>
Only	O
one	O
mobile	O
phone	O
is	O
allowed	O
to	O
be	O
the	O
primary	O
device	O
,	O
as	O
attempting	O
to	O
login	O
to	O
the	O
messaging	B-Application
app	I-Application
on	O
another	O
mobile	O
phone	O
would	O
trigger	O
the	O
previous	O
phone	O
to	O
be	O
logged	O
out	O
.	O
</s>
<s>
Examples	O
of	O
such	O
messaging	O
services	O
include	O
:	O
Skype	B-Application
,	O
Facebook	B-Protocol
Messenger	I-Protocol
,	O
Google	B-Protocol
Hangouts	I-Protocol
(	O
subsequently	O
Google	B-Application
Chat	I-Application
)	O
,	O
Telegram	B-Application
,	O
ICQ	B-Protocol
,	O
Element	B-Protocol
,	O
Slack	B-Protocol
,	O
Discord	B-Application
,	O
etc	O
.	O
</s>
