<s>
Samsung	B-Application
Galaxy	I-Application
M21	I-Application
is	O
a	O
mid-range	O
Android	B-Application
smartphone	B-Application
developed	O
by	O
Samsung	B-Application
Electronics	O
as	O
a	O
part	O
of	O
Galaxy	B-Application
M	I-Application
series	I-Application
smartphone	B-Application
lineup	O
for	O
2020	O
.	O
</s>
<s>
It	O
was	O
first	O
released	O
on	O
March	O
18	O
,	O
2020	O
as	O
the	O
successor	O
to	O
the	O
Galaxy	B-Application
M20	I-Application
and	O
Galaxy	B-Application
M30s	I-Application
.	O
</s>
<s>
It	O
comes	O
preinstalled	O
with	O
Android	B-Application
10	I-Application
and	O
Samsung	B-Application
's	O
custom	O
One	B-Application
UI	I-Application
2.0	I-Application
software	O
overlay	O
,	O
which	O
is	O
now	O
upgraded	O
to	O
Android	B-Application
12	I-Application
with	O
One	B-Application
UI	I-Application
4.1	I-Application
.	O
</s>
<s>
Samsung	B-Application
Galaxy	I-Application
M21	I-Application
has	O
an	O
improved	O
version	O
of	O
itself	O
,	O
the	O
Samsung	B-Application
Galaxy	I-Application
M21s	I-Application
,	O
released	O
in	O
6	O
November	O
,	O
2020	O
.	O
</s>
<s>
The	O
phone	O
features	O
6.4-inch	O
,	O
FHD+	O
Super	B-Algorithm
AMOLED	I-Algorithm
panel	O
with	O
rounded	O
corners	O
,	O
screen-to-body	O
ratio	O
of	O
91%	O
and	O
19.5:9	O
aspect	O
ratio	O
.	O
</s>
<s>
The	O
camera	O
system	O
of	O
the	O
phone	O
is	O
similar	O
to	O
Samsung	B-Application
Galaxy	I-Application
M30s	I-Application
.	O
</s>
<s>
An	O
infinity-U	O
screen	O
cut-out	O
on	O
the	O
front	O
houses	O
a	O
single	O
20	O
MP	O
selfie	O
camera	O
lens	O
with	O
f/2.2	O
aperture	B-General_Concept
.	O
</s>
<s>
The	O
phone	O
comes	O
with	O
Android	B-Application
10	I-Application
and	O
Samsung	B-Application
's	O
custom	O
One	B-Application
UI	I-Application
Core	I-Application
2.0	O
software	O
overlay	O
.	O
</s>
<s>
The	O
phone	O
received	O
One	B-Application
UI	I-Application
3.0	I-Application
update	O
based	O
on	O
Android	B-Application
11	O
on	O
27	O
January	O
2021	O
and	O
One	B-Application
UI	I-Application
3.1	O
on	O
31	O
March	O
2021	O
.	O
</s>
<s>
The	O
phone	O
also	O
features	O
on	O
the	O
list	O
where	O
Samsung	B-Application
smartphones	B-Application
released	O
after	O
2019	O
have	O
been	O
committed	O
to	O
receive	O
updates	O
for	O
a	O
minimum	O
of	O
4	O
years	O
,	O
however	O
if	O
the	O
committed	O
security	O
updates	O
will	O
translate	O
into	O
next	O
Android	B-Application
version	O
upgrades	O
is	O
yet	O
to	O
be	O
cleared	O
by	O
Samsung	B-Application
.	O
</s>
