Product comparison

Built-in camera

Yes

Front camera

Yes

Effective pixels front camera

32 megapixels

10 megapixels

32 megapixels

Number of front cameras

1

Camera features

Autofocus, Built-in flash/lamp, Electronic image stabilization (EIS)

Autofocus, Built-in flash/lamp, Optical image stabilization (OIS), Electronic image stabilization (EIS), Optical zoom

Effective pixels

48 megapixels

64 megapixels

12 megapixels

Maximum lens aperture

2

1.8

Number of rear cameras

4

3

Sensor format

1/2"

1/1.76"

Video recording

Yes

Max frame rate (highest resolution)

24 fps

Max frame rate (regardless of res.)

240 fps

960 fps

Max resolution (highest frame rate)

1920x1080 (HD 1080) pixels

1280x720 (HD 720) pixels

Maximum resolution (video)

3840x2160 (4K Ultra HD) pixels

7680x4320 (8K Ultra HD) pixels

2G (GSM)

Yes

3G (UMTS)

Yes

HSPA+

Yes

4G (LTE)

Yes

4G: Speed (down/up)

Cat.20/18: 2000/200 Mbit/s

Cat.19/18: 1600/200 Mbit/s

5G (NR)

No

Yes

No

Frequency range (5G)

FR1 (Sub-6 GHz)

Bluetooth

Yes

Bluetooth codec

SBC

aptX, LDAC, SBC

aptX, SBC

Bluetooth profile

A2DP, AVRCP

A2DP

A2DP, AVRCP, OPP, HFP, HSP, PBAP

Bluetooth version

5.0

5.1

5.0

Built-in navigation system

Yes

Type of navigation system

GPS, A-GPS, BeiDou, Galileo, GLONASS

NFC

Yes

Wireless network (Wi-Fi)

Yes

Wireless networking standard

802.11a, 802.11b, 802.11g, 802.11n (Wi-Fi 4), 802.11ac (Wi-Fi 5)

802.11a, 802.11b, 802.11g, 802.11n (Wi-Fi 4), 802.11ac (Wi-Fi 5), 802.11ax (Wi-Fi 6)

Data connector

USB

Type of USB connector

USB (Type C)

USB On-The-Go (OTG)

Yes

USB version

2.0

3 (Gen 1)

Headphone output (2.5/3.5 mm)

Yes

No

Type of connection

3.5 mm

Colour

Black, Silver, Blue, White, Green, Grey, Pink

Black, Silver, White, Grey, Purple, Pink

Black, Blue, White, Red, Green, Purple, Orange, Pink

Developed especially for seniors

No

Physical keyboard/numpad

No

Dimensions (WxHxD)

Depth

7.9 mm

8.4 mm

Height

158.5 mm

151.7 mm

159.8 mm

Width

73.6 mm

71.2 mm

74.5 mm

Product weight

172 g

169 g

190 g

Built-in sensors

Proximity sensor, Accelerometer, Gyroscope

Proximity sensor, Accelerometer, Gyroscope, Barometer

Built-in wireless charging

No

Yes

Wireless standard

QI, PMA

QI

Dual SIM card support

Yes

Hybrid Dual Sim

No

Yes

Type of Dual SIM

Dual SIM cards

Nano SIM/eSIM, Dual SIM cards

Dual SIM cards

Features

FM radio, Shock resistant, ANT+

Shock resistant, ANT+, Built-in stereo speakers, Hearing Aid Compatible, Ultra-wideband (UWB)

Built-in stereo speakers

Security

Fingerprint reader, Face scanner

SIM card

Nano sim

Supports fast charging

Yes

Water resistant

No

Yes

IP code (level of dust/water resistance)

IP68

Series

Galaxy A51

Samsung Galaxy S21

Galaxy S20

Aspect ratio

20:9

Display features

Scratch resistant display

Scratch resistant display, HDR, 120Hz refresh rate

Display technology

OLED (AMOLED)

Display

Colour

Number of colours

16 777 216 colours

Pixel density

405 PPI

421 PPI

407 PPI

Screen resolution (HxV)

1080x2400 pixels

Screen size

6.5 inches

6.2 inches

6.5 inches

Touchscreen

Yes

Material (body/chassis)

Glass, Plastic

Aluminium, Plastic

RAM size

4GB

8GB

6GB

Keyword

Release year

2019

2021

Battery capacity

4000 mAh

4500 mAh

Exchangeable battery

No

Graphics processor (GPU)

Yes

Graphics processor type

ARM Mali-G72 MP3

ARM Mali-G78 MP14

ARM Mali-G77 MP11

Processor core type

8 (Octa) Core

Processor speed

2.3 GHz

2.9 GHz

2.73 GHz

SoC/CPU (System on Chip)

Samsung Exynos 9 Octa (9611)

Samsung Exynos 2100

Samsung Exynos 990

Operating system

Android 10 (Android Q)

Android 12

Android 10 (Android Q)

Support for alternative firmware

Android One

Memory card reader

Yes

No

Yes

Compatible memory cards

microSD, microSDHC, microSDXC

Maximum memory card size

512GB

1TB

Storage space

128 GB

Samsung Galaxy A51 SM-A515F/DS Dual SIM 4GB RAM 128GB vs. Samsung Galaxy S21 SM-G991B 5G Dual SIM 8GB RAM 128GB + 1

Samsung Galaxy A51 SM-A515F/DS Dual SIM 4GB RAM 128GB

£243.00

Samsung Galaxy S21 SM-G991B 5G Dual SIM 8GB RAM 128GB

£483.00

Samsung Galaxy S20 FE SM-G780F Dual SIM 6GB RAM 128GB

£327.40