Comparison between:
- Samsung Galaxy A51
- Samsung W20 5G

Brand and model

Information about the brand, model and model alias (if any) of a specific device.

Samsung Galaxy A51Samsung W20 5G
Samsung Galaxy A51
Prices
Samsung W20 5G
Model aliasSM-A515F/DS
SM-A515F/DSN
SM-A515FN/DS
SM-A515GN/DS
SM-A515FM/DS
SM-A515YN
SM-A515W
-

Design

Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.

Width73.6 mm
7.36 cm
0.24 ft
2.9 in
125.8 mm
12.58 cm
0.41 ft
4.95 in
Height158.5 mm
15.85 cm
0.52 ft
6.24 in
160.9 mm
16.09 cm
0.53 ft
6.33 in
Thickness7.9 mm
0.79 cm
0.03 ft
0.31 in
8.5 mm
0.85 cm
0.03 ft
0.33 in
Weight172 g
0.38 lbs
6.07 oz
276 g
0.61 lbs
9.74 oz
Volume92.16 cm³
5.6 in³
172.05 cm³
10.45 in³
ColorsPrism Crush Blue
Prism Crush Black
Prism Crush Pink
Prism Crush White
Cosmos Black
Space Silver
Body materialsPlasticGlass
Aluminium alloy

SIM card

The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.

SIM card typeNano-SIMNano-SIM
Number of SIM cards21
FeaturesDual SIM stand-by (Both cards are active. When one is busy, the other is not active)-

Networks

A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.

GSMGSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
UMTSUMTS 850 MHz (B5)
UMTS 900 MHz (B8)
UMTS 1900 MHz (B2)
UMTS 2100 MHz (B1)
UMTS 850 MHz
UMTS 900 MHz
UMTS 1700/2100 MHz
UMTS 1900 MHz
UMTS 2100 MHz
LTELTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)
LTE-TDD 1900 MHz (B39)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE 700 MHz Class 13
LTE 700 MHz Class 17
LTE 800 MHz
LTE 850 MHz
LTE 900 MHz
LTE 1700/2100 MHz
LTE 1800 MHz
LTE 1900 MHz
LTE 2100 MHz
LTE 2600 MHz
LTE 700 MHz (B12)
5G NR-5G-TDD 2500 MHz (n41)
5G-TDD 3500 MHz (n78

Mobile network technologies and bandwidth

Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.

Mobile network technologiesUMTS
EDGE
GPRS
HSPA+
LTE Cat 12
UMTS
EDGE
GPRS
HSPA+
LTE Cat 18
5G NSA
-Enhanced 2X2 MIMO
6CA
LAA

Operating system

Operating system is the system software, which manages and controls the functioning of the hardware components of the device.

Operating system (OS)Android 10Android 9.0 Pie
User interface (UI)One UI 2.0-

System on Chip (SoC)

A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.

SoCSamsung Exynos 7 Octa 9611Qualcomm Snapdragon 855 Plus
Process technology10 nm7 nm
CPU4x 2.3 GHz ARM Cortex-A73, 4x 1.7 GHz ARM Cortex-A531x 2.96 GHz Kryo 485, 3x 2.42 GHz Kryo 485, 4x 1.8 GHz Kryo 485
CPU bits64 bit64 bit
Instruction setARMv8-AARMv8-A
CPU cores88
CPU frequency2300 MHz2960 MHz
GPUARM Mali-G72 MP3Qualcomm Adreno 640
GPU cores3-
GPU frequency-675 MHz
RAM capacity4 GB
6 GB
8 GB
12 GB
RAM typeLPDDR4XLPDDR4X
RAM channelsDouble channelDouble channel
RAM frequency-2133 MHz

Storage

Every mobile device has a built-in storage (internal memory) with a fixed capacity.

Storage64 GB
128 GB
512 GB
-UFS 3.0

Memory cards

Memory cards are used in mobile devices for expanding their external storage capacity.

TypesmicroSD
microSDHC
microSDXC
-

Display

The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.

Type/technologySuper AMOLEDDynamic AMOLED
Diagonal size6.5 in
165.1 mm
16.51 cm
7.3 in
185.42 mm
18.54 cm
Width2.67 in
67.75 mm
6.78 cm
5.94 in
150.92 mm
15.09 cm
Height5.93 in
150.56 mm
15.06 cm
4.24 in
107.72 mm
10.77 cm
Aspect ratio2.222:11.401:1
Resolution1080 x 2400 pixels2152 x 1536 pixels
Pixel density405 ppi
159 ppcm
362 ppi
142 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
Display area87.72 %80.58 %
Other featuresCapacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
-Main Infinity Flex Display
Cover Super AMOLED display - 4.6 in; 840x1960 pixels
Always-On Display
HDR10+

Sensors

Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.

SensorsProximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope
Barometer
Pedometer
Geomagnetic
Fingerprint
Hall
Heart rate
In-display fingerprint sensor-

Rear camera

The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.

Sensor modelSamsung S5KGM2Samsung SAK2L4
Sensor typeISOCELLISOCELL
Sensor format1/2.25"1/2.55"
Pixel size0.8 µm
0.000800 mm
1.4 µm
0.001400 mm
Aperturef/2f/1.5 - 2.4
Focal length and 35 mm equivalent-4.32 mm
26 mm *(35 mm / full frame)
Field of view-77 °
Number of lenses6-
Flash typeLEDDual LED
Image resolution8000 x 6000 pixels
48 MP
4032 x 3024 pixels
12.19 MP
Video resolution1920 x 1080 pixels
2.07 MP
3840 x 2160 pixels
8.29 MP
Video FPS30 fps60 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Digital image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Phase detection autofocus (PDAF)
Autofocus
Continuous shooting
Digital zoom
Digital image stabilization
Optical image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Phase detection autofocus (PDAF)
Pixel size - 1.6 μm (4-in-1 pixel binning)
Sensor type - ISOCELL PLUS
Super Phase Detection
Secondary rear camera - 12 MP (ultra-wide angle)
Aperture size - f/2.2 (#2)
Pixel size - 1.12 μm (#2)
Third rear camera - 5 MP (macro)
Aperture size - f/2.4 (#3)
Fourth rear camera - 5 MP (depth-sensing)
Aperture size - f/2.2 (#3)
Pixel size - 1.12 μm (#3)
Phase detection with Dual Pixel
Object tracking AF
Dual OIS
High CRI LED flash
1080p @ 240 fps
720p @ 960 fps
HDR10+ video recording
Secondary rear camera - 12 MP (telephoto)
Sensor model - Samsung S5K3M3 (#2)
Sensor type - ISOCELL (#2)
Sensor size - 1/3.4" (#2)
Pixel size - 1.0 μm (#2)
Aperture size - f/2.4 (#2)
Phase detection (#2)
Focal length (35 mm equivalent) - 52 mm (#2)
Angle of view - 45° (#2)
Dual OIS (#2)
Third rear camera - 16 MP (ultra-wide angle)
Sensor size - Samsung S5K3P9SP (#3)
Sensor type - ISOCELL (#3)
Sensor size - 1/3.1" (#3)
Pixel size - 1.0 μm (#3)
Aperture size - f/2.2 (#3)
Dual OIS (#3)
Focal length (35 mm equivalent) - 12 mm (#3)
Angle of view - 123° (#3)

Front camera

Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc.

Sensor modelSamsung S5KGD1Sony IMX347 Exmor RS
Sensor typeISOCELLCMOS
Sensor format1/2.8"-
Pixel size0.8 µm
0.000800 mm
1.22 µm
0.001220 mm
Aperturef/2.2f/2.2
Field of view-80 °
Image resolution6560 x 4928 pixels
32.33 MP
4320 x 2432 pixels
10.51 MP
Video resolution1920 x 1080 pixels
2.07 MP
3840 x 2160 pixels
8.29 MP
Video FPS30 fps30 fps
FeaturesFace unlockPhase detection autofocus (PDAF)
Sensor type - ISOCELL SlimPhase detection with Dual Pixel
Auto HDR
Sensor model - Samsung S5K4H7 (#2)
Sensor type - ISOCELL (#2)
Sensor size - 1/4" (#2)
Pixel size - 1.12 μm (#2)
Aperture szie - f/2.2 (#2)
Angle of view - 85° (#2)
10 MP (cover display)
Sensor model - Sony IMX347 Exmor RS (cover display)
Sensor type - CMOS (cover display)
Pixel size - 1.22 μm (cover display)
Aperture size - f/2.2 (cover display)
Focal length (35 mm equivalent) - 25 mm (cover display)
Angle of view - 80° (cover display)
Secondary front camera - 8 MP

Audio

Information about the type of speakers and the audio technologies supported by the device.

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Stereo speakers
-384 kHz / 32-bit
PCM - up to 32 bits
DSD64/128
AKG audio
Dolby Atmos
Headphone adapter

Radio

The radio in a mobile device is a built-in FM radio receiver.

RadioYesYes

Tracking/Positioning

Information about the positioning and navigation technologies supported by the device.

Tracking/PositioningGPS
A-GPS
GLONASS
BeiDou
Galileo
GPS
A-GPS
GLONASS
BeiDou
Galileo

Wi-Fi

Wi-Fi is a technology that provides wireless data connections between various devices within a short range.

Wi-Fi802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11ax
-HE80 MIMO
1024-QAM

Bluetooth

Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.

Version5.05.0
FeaturesA2DP
AVRCP
DIP
HFP
HID
HSP
MAP
OPP
PAN
PBAP
HOGP
A2DP
AVRCP
DIP
HFP
HID
HSP
LE
MAP
OPP
PAN
PBAP

USB

The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.

Connector typeUSB Type-CUSB Type-C
Version2.03.1
FeaturesCharging
Mass storage
On-The-Go
Charging
Mass storage
On-The-Go

Headphone jack

The headphone jack is an audio phone connector, a.k.a. an audio jack. The most widely used one in mobile devices is the 3.5 mm headphone jack.

Headphone jackYesNo

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
OTA sync
Tethering
VoLTE
ANT+
Computer sync
OTA sync
Tethering
NFC
ANT+

Browser

A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.

BrowserHTML
HTML5
CSS 3
HTML
HTML5
CSS 3

Audio file formats/codecs

Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.

Audio file formats/codecsAAC
AMR
AMR-WB
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
AAC
AMR
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
3GA
OGA
AWB
MID
XMF
MXMF
IMY
RTTTL
RTX
OTA
APE
DSF
DFF

Video file formats/codecs

Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.

Video file formats/codecs3GPP
3GPP2
AVI
Flash Video
H.263
H.264
H.265
MKV
MP4
VC-1
VP8
VP9
WebM
WMV
WMV7
WMV8
Xvid
AVI
MKV
MP4
WMV
M4V
3GP
3G2
ASF
FLV
WEBM

Battery

The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.

Capacity4000 mAh4235 mAh
TypeLi-IonLi-Polymer
Charger output power5 V / 2 A
9 V / 1.67 A
5 V / 2 A
9 V / 1.67 A
Quick charge technology-Qualcomm Quick Charge 2.0
FeaturesFast charging
Non-removable
Wireless charging
Fast charging
Non-removable
-Qi/PMA wireless charging - 15 W

Additional features

Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.

Additional features-DisplayPort via USB Type-C
Smart View (screen mirroring 1080p at 30 fps)
Supports video out when connecting via HDMI Adapter
Samsung DeX
Folded size - 62.9 mm x 160.9 mm x 17 mm (hinge - 15.5 mm (sagging)
Wireless reverse charging
 Samsung Galaxy A51Samsung W20 5G