<s>
The	O
Samsung	B-Application
Galaxy	I-Application
S21	I-Application
is	O
a	O
series	O
of	O
Android-based	B-Application
smartphones	B-Application
designed	O
,	O
developed	O
,	O
marketed	O
,	O
and	O
manufactured	O
by	O
Samsung	B-Application
Electronics	O
as	O
part	O
of	O
its	O
Galaxy	B-Application
S	I-Application
series	I-Application
.	O
</s>
<s>
They	O
collectively	O
serve	O
as	O
the	O
successor	O
to	O
the	O
Samsung	B-Application
Galaxy	I-Application
S20	I-Application
series	O
.	O
</s>
<s>
The	O
first	O
three	O
smartphones	B-Application
were	O
unveiled	O
at	O
Samsung	B-Application
's	O
Galaxy	O
Unpacked	O
event	O
on	O
14	O
January	O
2021	O
,	O
while	O
the	O
Fan	O
Edition	O
model	O
was	O
unveiled	O
at	O
Samsung	B-Application
's	O
CES	O
on	O
3	O
January	O
2022	O
.	O
</s>
<s>
The	O
S21	O
series	O
consists	O
of	O
the	O
base	O
Galaxy	B-Application
S21	I-Application
model	O
,	O
the	O
plus	O
Galaxy	B-Application
S21+	I-Application
model	O
,	O
the	O
camera-focused	O
Galaxy	B-Application
S21	I-Application
Ultra	I-Application
model	O
,	O
and	O
the	O
mid-range	O
variant	O
Galaxy	B-Application
S21	I-Application
FE	I-Application
model	O
.	O
</s>
<s>
Key	O
upgrades	O
over	O
the	O
previous	O
models	O
,	O
in	O
addition	O
to	O
improved	O
specifications	O
,	O
a	O
display	O
with	O
a	O
120	O
Hz	O
adaptive	B-General_Concept
refresh	I-General_Concept
rate	I-General_Concept
,	O
an	O
improved	O
camera	O
system	O
supporting	O
8K	B-Architecture
video	I-Architecture
recording	O
(	O
7680×4320	O
)	O
for	O
the	O
first	O
three	O
models	O
,	O
and	O
a	O
super-resolution	O
zoom	O
of	O
30	O
–	O
100x	O
,	O
for	O
the	O
ultra	O
model	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S21	I-Application
FE	I-Application
,	O
S21	O
,	O
S21+	O
,	O
and	O
S21	B-Application
Ultra	I-Application
launch	O
prices	O
started	O
at	O
$699.99	O
,	O
$799.99	O
,	O
$999.99	O
,	O
and	O
$1079.99	O
,	O
respectively	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S21	I-Application
was	O
succeeded	O
by	O
the	O
Galaxy	B-Application
S22	I-Application
,	O
which	O
was	O
announced	O
on	O
9	O
February	O
2022	O
.	O
</s>
<s>
The	O
lineup	O
of	O
the	O
first	O
three	O
devices	O
was	O
unveiled	O
at	O
Samsung	B-Application
's	O
Galaxy	O
Unpacked	O
event	O
on	O
14	O
January	O
2021	O
.	O
</s>
<s>
All	O
devices	O
 '	O
design	O
scheme	O
has	O
changed	O
drastically	O
,	O
redesigning	O
the	O
massive	O
rear-camera	O
module	O
for	O
a	O
slimmer	O
camera	O
module	O
incorporated	O
with	O
the	O
buttons	O
and	O
a	O
uniform	O
appearance	O
for	O
the	O
S21	O
,	O
S21+	O
,	O
and	O
S21	B-Application
Ultra	I-Application
.	O
</s>
<s>
The	O
S21	B-Application
Ultra	I-Application
serves	O
as	O
the	O
high-end	O
model	O
of	O
the	O
S21	O
series	O
,	O
integrated	O
as	O
the	O
professional	O
version	O
of	O
the	O
lineup	O
,	O
and	O
successor	O
to	O
the	O
S20	O
Ultra	O
.	O
</s>
<s>
The	O
phone	O
became	O
the	O
first	O
of	O
the	O
s-series	O
lineup	O
to	O
have	O
s-pen	B-Operating_System
support	O
,	O
with	O
limited	O
functionality	O
.	O
</s>
<s>
The	O
S21	O
series	O
discontinued	O
sales	O
once	O
the	O
Galaxy	B-Application
S22	I-Application
were	O
released	O
.	O
</s>
<s>
The	O
"	O
Fan	O
Edition	O
"	O
follow-up	O
was	O
unveiled	O
at	O
Samsung	B-Application
's	O
CES	O
2022	O
event	O
on	O
3	O
January	O
2022	O
.	O
</s>
<s>
The	O
S21	O
FE	O
serves	O
as	O
the	O
successor	O
to	O
the	O
S20	B-Application
FE	I-Application
,	O
a	O
series	O
of	O
mid-range	O
variants	O
of	O
their	O
corresponding	O
Galaxy	B-Application
S	I-Application
lineup	O
upon	O
launch	O
.	O
</s>
<s>
The	O
lineup	O
comprises	O
four	O
devices	O
,	O
with	O
the	O
Galaxy	B-Application
S21	I-Application
initially	O
being	O
the	O
least	O
expensive	O
with	O
a	O
smaller	O
screen	O
size	O
and	O
a	O
(	O
plastic	O
)	O
polycarbonate	O
back	O
,	O
which	O
then	O
is	O
undercut	O
later	O
on	O
by	O
the	O
Galaxy	B-Application
S21	I-Application
FE	I-Application
with	O
the	O
same	O
material	O
minus	O
the	O
camera	O
bump	O
being	O
also	O
polycarbonate	O
than	O
metal	O
.	O
</s>
<s>
In	O
contrast	O
to	O
the	O
Galaxy	B-Application
S20+	I-Application
,	O
the	O
Galaxy	B-Application
S21+	I-Application
is	O
very	O
similar	O
to	O
the	O
S21	O
spec-wise	O
,	O
with	O
the	O
exception	O
of	O
a	O
larger	O
display	O
,	O
higher	O
battery	O
capacity	O
,	O
and	O
glass	O
back	O
instead	O
of	O
plastic	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S21	I-Application
Ultra	I-Application
has	O
an	O
even	O
larger	O
screen	O
size	O
,	O
battery	O
,	O
and	O
a	O
host	O
of	O
other	O
improvements	O
over	O
the	O
other	O
models	O
,	O
including	O
a	O
more	O
advanced	O
camera	O
setup	O
highlighted	O
by	O
its	O
108MP	O
main	O
sensor	O
with	O
laser	O
auto-focus	O
and	O
a	O
higher	O
resolution	O
1440p	O
display	O
.	O
</s>
<s>
The	O
S21	B-Application
Ultra	I-Application
is	O
also	O
the	O
first	O
phone	O
in	O
the	O
Galaxy	B-Application
S	I-Application
series	I-Application
to	O
support	O
the	O
S	B-Operating_System
Pen	I-Operating_System
,	O
albeit	O
sold	O
separately	O
and	O
with	O
limited	O
functionality	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S21	I-Application
series	O
has	O
a	O
design	O
similar	O
to	O
its	O
predecessor	O
,	O
with	O
an	O
Infinity-O	O
display	O
containing	O
a	O
circular	O
cutout	O
in	O
the	O
top	O
center	O
for	O
the	O
front	O
selfie	O
camera	O
.	O
</s>
<s>
The	O
S21	O
and	O
S21	O
FE	O
's	O
back	O
panel	O
is	O
reinforced	O
poly-carbonate	O
(	O
plastic	O
)	O
similar	O
to	O
the	O
S20	B-Application
FE	I-Application
and	O
Note	B-Application
20	I-Application
while	O
the	O
S21+	O
and	O
S21	B-Application
Ultra	I-Application
use	O
Gorilla	O
Glass	O
Victus	O
.	O
</s>
<s>
The	O
rear	O
camera	O
array	O
has	O
been	O
integrated	O
into	O
the	O
phone	O
body	O
except	O
for	O
the	O
S21	O
FE	O
which	O
is	O
made	O
out	O
of	O
reinforced	O
poly-carbonate	O
integrated	O
instead	O
on	O
the	O
back	O
cover	O
and	O
has	O
a	O
metallic	O
surround	O
;	O
the	O
S21	B-Application
Ultra	I-Application
has	O
a	O
carbon	O
fiber	O
camera	O
surround	O
for	O
exclusive	O
colors	O
.	O
</s>
<s>
The	O
S21	O
series	O
feature	O
"	O
Dynamic	O
AMOLED	B-Algorithm
2X	O
"	O
displays	O
with	O
HDR10+	B-Device
support	O
and	O
"	O
dynamic	O
tone	O
mapping	O
"	O
technology	O
.	O
</s>
<s>
The	O
S21	B-Application
Ultra	I-Application
is	O
also	O
now	O
able	O
to	O
use	O
120Hz	O
at	O
1440p	O
unlike	O
its	O
predecessor(which was limited to 120Hz at only 1080p )	O
.	O
</s>
<s>
The	O
S21	O
and	O
S21+	O
offer	O
8GB	O
of	O
RAM	B-Architecture
with	O
128GB	O
and	O
256GB	O
options	O
for	O
internal	O
storage	O
.	O
</s>
<s>
The	O
S21	B-Application
Ultra	I-Application
has	O
12GB	O
of	O
RAM	B-Architecture
with	O
128GB	O
and	O
256GB	O
options	O
as	O
well	O
as	O
a	O
16GB	O
option	O
with	O
512GB	O
of	O
internal	O
storage	O
.	O
</s>
<s>
The	O
S21	O
FE	O
offers	O
6GB	O
and	O
8GB	O
of	O
RAM	B-Architecture
with	O
128GB	O
and	O
256GB	O
options	O
for	O
internal	O
storage	O
.	O
</s>
<s>
The	O
S21	O
,	O
S21	O
FE	O
,	O
S21+	O
,	O
and	O
S21	B-Application
Ultra	I-Application
contain	O
non-removable	O
4000mAh	O
,	O
4,500	O
mAh	O
,	O
4800mAh	O
,	O
and	O
5000mAh	O
Li-Po	O
batteries	O
respectively	O
.	O
</s>
<s>
All	O
four	O
models	O
support	O
wired	O
charging	O
over	O
USB-C	O
at	O
up	O
to	O
25W	O
(	O
using	O
USB	O
Power	O
Delivery	O
)	O
as	O
well	O
as	O
Qi	O
inductive	B-Application
charging	I-Application
up	O
to	O
15W	O
.	O
</s>
<s>
All	O
four	O
phones	O
support	O
5G	O
SA/NSA	O
networks	O
,	O
The	O
Galaxy	B-Application
S21	I-Application
,	O
S21+	O
,	O
and	O
S21	O
FE	O
support	O
Wi-Fi	O
6	O
and	O
Bluetooth	O
5.0	O
,	O
while	O
the	O
Galaxy	B-Application
S21	I-Application
Ultra	I-Application
supports	O
Wi-Fi	O
6E	O
and	O
Bluetooth	O
5.2	O
.	O
</s>
<s>
The	O
S21+	O
and	O
S21	B-Application
Ultra	I-Application
models	O
also	O
support	O
Ultra	O
Wideband	O
(	O
UWB	O
)	O
for	O
short-range	O
communications	O
similar	O
to	O
NFC	O
(	O
not	O
to	O
be	O
confused	O
with	O
5G	O
mmWave	O
,	O
which	O
is	O
marketed	O
as	O
Ultra	O
Wideband	O
by	O
Verizon	B-Application
)	O
.	O
</s>
<s>
Samsung	B-Application
uses	O
this	O
technology	O
for	O
their	O
new	O
"	O
SmartThings	O
Find	O
"	O
feature	O
and	O
the	O
Samsung	B-Operating_System
Galaxy	I-Operating_System
SmartTag+	I-Operating_System
.	O
</s>
<s>
The	O
S21	B-Application
Ultra	I-Application
has	O
a	O
new	O
HM3	O
108	O
MP	O
sensor	O
with	O
several	O
enhancements	O
over	O
the	O
previous	O
HM1	O
108	O
MP	O
sensor	O
,	O
including	O
12-bit	O
HDR	O
.	O
</s>
<s>
The	O
front-facing	O
camera	O
uses	O
a	O
10	O
MP	O
sensor	O
on	O
the	O
S21	O
and	O
S21+	O
,	O
32	O
MP	O
sensor	O
on	O
the	O
S21	O
FE	O
,	O
and	O
a	O
40	O
MP	O
sensor	O
on	O
the	O
S21	B-Application
Ultra	I-Application
.	O
</s>
<s>
4K	B-Architecture
@60	O
recording	O
is	O
supported	O
on	O
the	O
ultrawide	O
camera	O
on	O
the	O
S21	O
,	O
S21+	O
,	O
and	O
S21	O
FE	O
and	O
all	O
cameras	O
on	O
the	O
S21	B-Application
Ultra	I-Application
.	O
</s>
<s>
All	O
cameras	O
are	O
Samsung	B-Application
except	O
12MP	O
Ultra	O
Wide	O
on	O
S21	B-Application
Ultra	I-Application
and	O
10MP	O
front	O
on	O
S21	O
and	O
S21+	O
,	O
which	O
are	O
both	O
made	O
by	O
Sony	O
,	O
and	O
the	O
8MP	O
Telephoto	O
on	O
the	O
S21	O
FE	O
which	O
is	O
made	O
by	O
SK	O
Hynix	O
.	O
</s>
<s>
The	O
Galaxy	B-Application
S21	I-Application
series	O
can	O
record	O
HDR10+	B-Device
video	O
and	O
support	O
HEIF	O
.	O
</s>
<s>
Users	O
discovered	O
that	O
the	O
Scene	O
Optimizer	O
included	O
with	O
Samsung	B-Application
Galaxy	I-Application
S21	I-Application
and	O
later	O
phones	O
use	O
artificial	O
intelligence	O
to	O
identify	O
the	O
Moon	O
and	O
add	O
details	O
that	O
the	O
camera	O
is	O
not	O
capable	O
of	O
capturing	O
,	O
based	O
on	O
a	O
library	O
of	O
existing	O
moon	O
photos	O
.	O
</s>
<s>
The	O
Samsung	B-Application
Galaxy	I-Application
S21	I-Application
series	O
supports	O
the	O
following	O
video	O
modes	O
:	O
</s>
<s>
The	O
first	O
three	O
S21	O
phones	O
were	O
released	O
with	O
Android	B-Application
11	I-Application
(	O
One	B-Application
UI	I-Application
3.1	O
)	O
and	O
Google	B-Application
Mobile	I-Application
Services	I-Application
,	O
with	O
Samsung	B-Application
's	O
One	B-Application
UI	I-Application
software	O
.	O
</s>
<s>
While	O
the	O
S21	O
FE	O
was	O
supposed	O
to	O
be	O
released	O
with	O
the	O
same	O
android	B-Application
version	O
and	O
One	B-Application
UI	I-Application
skin	O
,	O
due	O
to	O
it	O
being	O
delayed	O
all	O
devices	O
are	O
now	O
updated	O
with	O
Android	B-Application
12	I-Application
(	O
One	B-Application
UI	I-Application
4.0	O
)	O
instead	O
.	O
</s>
<s>
They	O
all	O
use	O
Samsung	B-Application
Knox	I-Application
for	O
enhanced	O
device	O
factory	O
reset	O
protection	O
(	O
FRP	O
)	O
security	O
,	O
and	O
a	O
separate	O
version	O
exist	O
for	O
enterprise	O
use.The	O
first	O
three	O
S21	O
series	O
smartphones	B-Application
were	O
updated	O
to	O
Android	B-Application
12	I-Application
and	O
One	B-Application
UI	I-Application
4	O
on	O
15	O
November	O
2021	O
.	O
</s>
<s>
Samsung	B-Application
added	O
a	O
"	O
repair	O
mode	O
"	O
to	O
its	O
Galaxy	B-Application
S21	I-Application
on	O
28	O
July	O
2022	O
,	O
hiding	O
users	O
 '	O
data	O
when	O
they	O
entrust	O
an	O
ailing	O
device	O
to	O
a	O
technician	O
.	O
</s>
<s>
The	O
One	B-Application
UI	I-Application
5	O
update	O
based	O
on	O
Android	B-Application
13	I-Application
began	O
rolling	O
out	O
to	O
S21	O
devices	O
on	O
7	O
November	O
2022	O
.	O
</s>
<s>
The	O
Verge'''s	O
review	O
,	O
by	O
Dieter	O
Bohn	O
,	O
praised	O
the	O
S21	B-Application
Ultra	I-Application
's	O
punchy	O
display	O
,	O
fast	O
performance	O
,	O
long-lasting	O
battery	O
life	O
and	O
the	O
general	O
improvements	O
to	O
the	O
camera	O
system	O
,	O
likening	O
the	O
latter	O
to	O
that	O
of	O
the	O
iPhone	B-Operating_System
12	I-Operating_System
Pro	I-Operating_System
Max	I-Operating_System
's	O
;	O
however	O
,	O
Bohn	O
did	O
note	O
that	O
the	O
phone	O
's	O
glass	O
back	O
is	O
slightly	O
more	O
susceptible	O
to	O
minor	O
scratches	O
.	O
</s>
<s>
Android	B-Application
Authority'''s	O
review	O
by	O
David	O
Imel	O
noted	O
the	O
Samsung	B-Application
's	O
Galaxy	B-Application
S21	I-Application
Ultra	I-Application
"	O
is	O
a	O
powerhouse	O
smartphone	B-Application
"	O
and	O
that	O
"	O
the	O
camera	O
system	O
in	O
Samsung	B-Application
Galaxy	I-Application
S21	I-Application
Ultra	I-Application
is	O
one	O
of	O
the	O
best	O
you	O
can	O
get	O
on	O
Android	B-Application
"	O
.	O
</s>
<s>
Matt	O
Sweder	O
at	O
Techradar	O
gave	O
a	O
positive	O
review	O
noting	O
its	O
"	O
mesmerizing	O
design	O
"	O
calling	O
it	O
"	O
Samsung	B-Application
’s	O
best-looking	O
phone	O
ever	O
"	O
and	O
how	O
"	O
phenomenally	O
powerful	O
"	O
the	O
camera	O
is	O
,	O
but	O
also	O
went	O
on	O
to	O
criticize	O
the	O
price	O
and	O
lack	O
of	O
microSD	O
card	O
slot	O
,	O
and	O
questioning	O
the	O
stylus	O
support	O
,	O
which	O
is	O
a	O
separate	O
purchase	O
,	O
with	O
nowhere	O
to	O
put	O
the	O
S	B-Operating_System
Pen	I-Operating_System
on	O
the	O
phone	O
itself	O
.	O
</s>
<s>
Criticism	O
has	O
been	O
aimed	O
at	O
the	O
lack	O
of	O
a	O
charger	O
and	O
memory	O
card-expandable	O
storage	O
,	O
the	O
latter	O
of	O
which	O
existed	O
on	O
the	O
preceding	O
Galaxy	B-Application
S20	I-Application
.	O
</s>
<s>
In	O
2018	O
,	O
Samsung	B-Application
made	O
fun	O
of	O
iPhone	B-Device
's	O
lack	O
of	O
the	O
same	O
features	O
and	O
an	O
audio	O
connector	O
port	O
in	O
a	O
series	O
of	O
commercials	O
for	O
the	O
Galaxy	B-Application
S9	I-Application
named	O
"	O
Ingenious	O
"	O
,	O
where	O
unhappy	O
iPhone	B-Device
customers	O
confront	O
an	O
Apple	O
Store	O
employee	O
over	O
the	O
lack	O
of	O
functionality	O
that	O
the	O
Galaxy	B-Application
S9	I-Application
was	O
equipped	O
with	O
,	O
a	O
feature	O
which	O
has	O
since	O
been	O
removed	O
from	O
all	O
Galaxy	B-Operating_System
phones	I-Operating_System
.	O
</s>
<s>
Following	O
Apple	O
,	O
Samsung	B-Application
decided	O
not	O
to	O
include	O
a	O
wall	O
charger	O
or	O
earphones	O
when	O
selling	O
the	O
Galaxy	B-Application
S21	I-Application
series	O
of	O
smartphones	B-Application
,	O
the	O
reasoning	O
being	O
that	O
"	O
Samsung	B-Application
believes	O
the	O
removal	O
of	O
earphones	O
and	O
charger	O
plugs	O
from	O
our	O
in-box	O
device	O
packaging	O
can	O
help	O
address	O
the	O
growing	O
e-waste	O
problem	O
and	O
unnecessary	O
duplication	O
of	O
these	O
items	O
"	O
.	O
</s>
