Comparison between:
- Samsung Galaxy A51
- Samsung Galaxy A20
- Google Pixel 4a
- Motorola Moto G Power

Brand and model

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

Samsung Galaxy A51Samsung Galaxy A20Google Pixel 4aMotorola Moto G Power
Samsung Galaxy A51
Prices
Samsung Galaxy A20
Prices
Google Pixel 4a
Prices
Motorola Moto G Power
Model aliasSM-A515F/DS
SM-A515F/DSN
SM-A515FN/DS
SM-A515GN/DS
SM-A515FM/DS
SM-A515YN
SM-A515W
SM-A205FD
A205FD
--

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
0.241 ft
2.898 in
74.7 mm
7.47 cm
0.245 ft
2.941 in
69.4 mm
6.94 cm
0.228 ft
2.732 in
75.84 mm
7.584 cm
0.249 ft
2.986 in
Height158.5 mm
15.85 cm
0.52 ft
6.24 in
158.4 mm
15.84 cm
0.52 ft
6.236 in
144 mm
14.4 cm
0.472 ft
5.669 in
159.85 mm
15.985 cm
0.524 ft
6.293 in
Thickness7.9 mm
0.79 cm
0.026 ft
0.311 in
7.8 mm
0.78 cm
0.026 ft
0.307 in
8.2 mm
0.82 cm
0.027 ft
0.323 in
9.63 mm
0.963 cm
0.032 ft
0.379 in
Weight172 g
0.38 lbs
6.07 oz
169 g
0.37 lbs
5.96 oz
143 g
0.32 lbs
5.04 oz
199 g
0.44 lbs
7.02 oz
Volume92.16 cm³
5.6 in³
92.29 cm³
5.6 in³
81.95 cm³
4.98 in³
116.74 cm³
7.09 in³
ColorsPrism Crush Blue
Prism Crush Black
Prism Crush Pink
Prism Crush White
Black
Red
Blue
Gold
Just BlackSmoke Black
Body materialsPlasticPlasticGlass
Polycarbonate
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-SIMNano-SIMNano-SIM
Nano-SIM / microSD
Number of SIM cards2212
FeaturesDual SIM stand-by (Both cards are active. When one is busy, the other is not active)Dual SIM stand-by (Both cards are active. When one is busy, the other is not active)-Dual 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
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
CDMA--CDMA 800 MHz (BC0)
CDMA 1900 MHz (BC1)
CDMA 800 MHz (BC10)
CDMA 800 MHz (BC0)
CDMA 1900 MHz (BC1)
CDMA BC10
W-CDMA---W-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 1700 MHz (B4)
W-CDMA 1900 MHz (B2)
W-CDMA 2100 MHz (B1)
UMTSUMTS 850 MHz (B5)
UMTS 900 MHz (B8)
UMTS 1900 MHz (B2)
UMTS 2100 MHz (B1)
UMTS 850 MHz
UMTS 900 MHz
UMTS 1900 MHz
UMTS 2100 MHz
UMTS 850 MHz (B5)
UMTS 900 MHz (B8)
UMTS 1700 MHz (B4)
UMTS 1900 MHz (B2)
UMTS 2100 MHz (B1)
-
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 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE 800 MHz
LTE 850 MHz
LTE 900 MHz
LTE 1800 MHz
LTE 2100 MHz
LTE 2600 MHz
LTE-FDD 700 MHz (B12)
LTE-FDD 700 MHz (B13)
LTE-FDD 700 MHz (B14)
LTE-FDD 700 MHz (B17)
LTE-FDD 700 MHz (B28)
LTE-FDD 700 MHz (B29)
LTE-FDD 800 MHz (B20)
LTE-FDD 850 MHz (B5)
LTE-FDD 850 MHz (B18)
LTE-FDD 850 MHz (B19)
LTE-FDD 850 MHz (B26)
LTE-FDD 900 MHz (B8)
LTE-FDD 1700 MHz (B4)
LTE-FDD 1700 MHz (B66)
LTE-FDD 1800 MHz (B3)
LTE-FDD 1900 MHz (B2)
LTE-FDD 1900 MHz (B25)
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-FDD 2300 MHz (B30)
LTE-TDD 5200 MHz (B46)
LTE-TDD 3500 MHz (B46)
LTE-FDD 600 MHz (B71)
LTE-FDD 700 MHz (B12)
LTE-FDD 700 MHz (B13)
LTE-FDD 700 MHz (B14)
LTE-FDD 700 MHz (B17)
LTE-FDD 700 MHz (B29)
LTE-FDD 800 MHz (B20)
LTE-FDD 850 MHz (B5)
LTE-FDD 850 MHz (B18)
LTE-FDD 850 MHz (B19)
LTE-FDD 850 MHz (B26)
LTE-FDD 900 MHz (B8)
LTE-FDD 1700 MHz (B4)
LTE-FDD 1700 MHz (B66)
LTE-FDD 1800 MHz (B3)
LTE-FDD 1900 MHz (B2)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)
LTE-TDD 1900 MHz (B39)
LTE-TDD 2000 MHz (B34)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE-FDD B30
LTE-FDD B71

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
HSPA+
LTE Cat 4
UMTS
EDGE
GPRS
HSPA+
LTE
EV-DO Rev. A
UMTS
EDGE
GPRS
HSPA+
EV-DO Rev. A
LTE Cat 13 DL/Cat 5 UL
--2x2 MiMO-

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 PieAndroid 10Android 10
User interface (UI)One UI 2.0One--

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 9611Samsung Exynos 7 Octa 7884Qualcomm Snapdragon 730GQualcomm Snapdragon 665
Process technology10 nm14 nm8 nm11 nm
CPU4x 2.3 GHz ARM Cortex-A73, 4x 1.7 GHz ARM Cortex-A532x 1.6 GHz ARM Cortex-A73, 6x 1.35 GHz ARM Cortex-A532x 2.2 GHz Kryo 470, 6x 1.8 GHz Kryo 4704x 2.0 GHz Kryo 260, 4x 1.8 GHz Kryo 260
CPU bits64 bit64 bit64 bit64 bit
Instruction setARMv8-AARMv8-AARMv8ARMv8
CPU cores8888
CPU frequency2300 MHz1600 MHz2200 MHz2000 MHz
GPUARM Mali-G72 MP3ARM Mali-G71Qualcomm Adreno 618Qualcomm Adreno 610
GPU cores3---
RAM capacity4 GB
6 GB
8 GB
3 GB6 GB4 GB
RAM typeLPDDR4X-LPDDR4XLPDDR4X
RAM channelsDouble channel-Double channelDouble channel
RAM frequency--2133 MHz1333 MHz
--Titan M Security Module-

Storage

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

Storage64 GB
128 GB
32 GB128 GB64 GB

Memory cards

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

TypesmicroSD
microSDHC
microSDXC
microSD
microSDHC
microSDXC
-microSD
microSDHC
microSDXC

Display

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

Type/technologySuper AMOLEDSuper AMOLEDOLEDIPS
Diagonal size6.5 in
165.1 mm
16.51 cm
6.4 in
162.56 mm
16.26 cm
5.81 in
147.57 mm
14.76 cm
6.4 in
162.56 mm
16.26 cm
Width2.67 in
67.75 mm
6.78 cm
2.68 in
68.12 mm
6.81 cm
2.49 in
63.17 mm
6.32 cm
2.72 in
69.09 mm
6.91 cm
Height5.93 in
150.56 mm
15.06 cm
5.81 in
147.6 mm
14.76 cm
5.25 in
133.37 mm
13.34 cm
5.79 in
147.15 mm
14.71 cm
Aspect ratio2.222:12.167:12.111:12.13:1
Resolution1080 x 2400 pixels720 x 1560 pixels1080 x 2280 pixels1080 x 2300 pixels
Pixel density405 ppi
159 ppcm
268 ppi
105 ppcm
434 ppi
170 ppcm
397 ppi
156 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area87.72 %85.25 %84.58 %84.14 %
Other featuresCapacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
--Ambient EQ
Corning Gorilla Glass
Always-on Display
HDR (UHDA certification)
-

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
Fingerprint
Hall
Proximity
Light
Accelerometer
Gyroscope
Barometer
Magnetometer
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
In-display fingerprint sensor-Active Edge
Motion Sense (Soli radar)
-

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 S5KGM2Sony IMX258 Exmor RS--
Sensor typeISOCELLCMOS--
Sensor size-4.71 x 3.49 mm
0.23 in
--
Sensor format1/2.25"1/3.06"1/2.55"-
Pixel size0.8 µm
0.000800 mm
1.12 µm
0.001120 mm
1.4 µm
0.001400 mm
1.12 µm
0.001120 mm
Crop factor-7.37--
Aperturef/2f/1.9f/1.7f/1.7
Focal length and 35 mm equivalent-3.6 mm
26.55 mm *(35 mm / full frame)
28 mm *(35 mm / full frame)-
Field of view-78 °77 °-
Number of lenses6---
Flash typeLEDLEDDual LEDDual LED
Image resolution8000 x 6000 pixels
48 MP
4224 x 3136 pixels
13.25 MP
4032 x 3024 pixels
12.19 MP
4608 x 3456 pixels
15.93 MP
Video resolution1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
3840 x 2160 pixels
8.29 MP
3840 x 2160 pixels
8.29 MP
Video FPS30 fps30 fps60 fps30 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
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Autofocus
Continuous shooting
Digital zoom
Optical 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)
Autofocus
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)
Laser autofocus (LAF)
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)
Secondary rear camera - 5 MP (ultra-wide angle)
Aperture size - f/2.2 (#2)
Angle of view - 123° (#2)
Phase detection with Dual Pixel
1080p @ 120 fps
720p @ 240 fps
1080p @ 60 fps
Secondary rear camera - 2 MP (macro)
Aperture size - f/2.2 (#2)
Pixel size - 1.75 µm (#2)
Third rear camera - 8 MP (ultra-wide angle)
Angle of view - 118° (#3)
Aperture size - f/2.2 (#3)
Pixel size - 1.12 µm (#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 S5KGD1---
Sensor typeISOCELL--CMOS BSI
Sensor format1/2.8"---
Pixel size0.8 µm
0.000800 mm
-1.22 µm
0.001220 mm
1 µm
0.001000 mm
Aperturef/2.2f/2f/2f/2
Focal length and 35 mm equivalent-2.61 mm
25 mm *(35 mm / full frame)
22 mm *(35 mm / full frame)-
Field of view--84 °-
Image resolution6560 x 4928 pixels
32.33 MP
3264 x 2448 pixels
7.99 MP
3264 x 2448 pixels
7.99 MP
4608 x 3456 pixels
15.93 MP
Video resolution1920 x 1080 pixels
2.07 MP
1280 x 720 pixels
0.92 MP
1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
Video FPS30 fps30 fps30 fps30 fps
FeaturesFace unlock-HDR
Face detection
Face unlock
Face unlock
Sensor type - ISOCELL Slim-2 NIR cameras
NIR flood emitter
NIR dot projector
1080p @ 120 fps
720p @ 240 fps

Audio

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

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Stereo speakers
Loudspeaker
Earpiece
Stereo speakers
--Active noise cancellation
HAC (M3/T3) - Hearing Aid Compatibility
Dolby Audio
Smart PA
Active noise cancellation with dual microphones

Radio

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

RadioYesYesNoYes

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
GPS
A-GPS
GLONASS
Galileo
GPS
A-GPS
GLONASS
Galileo
LTEPP
SUPL

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
802.11b
802.11g
802.11n
Wi-Fi Hotspot
Wi-Fi Direct
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
--2x2 MiMO-

Bluetooth

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

Version5.05.05.05.0
FeaturesA2DP
AVRCP
DIP
HFP
HID
HSP
MAP
OPP
PAN
PBAP
HOGP
A2DP
AVRCP
DIP
HFP
HID
HSP
MAP
OPP
PAN
PBAP
HOGP
A2DP
LE
A2DP
EDR
LE

USB

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

Connector typeUSB Type-CUSB Type-CUSB Type-CUSB Type-C
Version2.02.02.02.0
FeaturesCharging
Mass storage
On-The-Go
Charging
Mass storage
On-The-Go
Charging
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 jackYesYesYesYes

Connectivity

Information about other important connectivity technologies supported by the devices.

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

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
HTML
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
AMR-WB
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AMR
AMR-WB
aptX
aptX HD
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
LDAC
AAC
AMR
aptX
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV

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
3GPP
3GPP2
AVI
Flash Video
H.263
H.264
H.265
MKV
MP4
VC-1
VP8
VP9
WebM
WMV
WMV7
WMV8
Xvid
3GPP
AVI
DivX
Flash Video
H.263
H.264
H.265
MKV
QuickTime
MP4
VC-1
VP8
WebM
WMV
Xvid
3GPP
AVI
H.263
H.264
MKV
QuickTime
MP4
WebM
WMV
Xvid

Battery

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

Capacity4000 mAh4000 mAh3140 mAh5000 mAh
TypeLi-IonLi-PolymerLi-PolymerLi-Ion
2G talk time-26 h
1560 min
1.1 days
--
3G talk time-26 h
1560 min
1.1 days
--
Charger output power5 V / 2 A
9 V / 1.67 A
5 V / 2 A
9 V / 1.67 A
9 V / 2 A5 V / 2 A
Quick charge technology--USB Power Delivery 2.0-
FeaturesFast charging
Non-removable
Fast charging
Non-removable
Fast charging
Non-removable
Fast charging
Non-removable

Specific Absorption Rate (SAR)

The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg.

Head SAR (EU)0.369 W/kg0.23 W/kg1.37 W/kg-
Body SAR (EU)1.59 W/kg1.38 W/kg1.39 W/kg-
Head SAR (USA)0.8 W/kg-1.18 W/kg1.19 W/kg
Body SAR (USA)0.67 W/kg-1.19 W/kg1.39 W/kg

Additional features

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

Additional features---Water repellent design
 Samsung Galaxy A51Samsung Galaxy A20Google Pixel 4aMotorola Moto G Power