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Samsung Galaxy S21 SM-G991B 5G Dual SIM 8GB RAM 128GB vs. Samsung Galaxy A71 SM-A715F/DS Dual SIM 6GB RAM 128GB + 1
Built-in camera
Yes
Yes
Yes
Front camera
Yes
Yes
Yes
Effective pixels front camera
10 megapixels
32 megapixels
32 megapixels
Number of front cameras
1 ​
1 ​
1 ​
Camera features
Autofocus, Built-in flash/lamp, Optical image stabilization (OIS), Electronic image stabilization (EIS), Optical zoom
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
64 megapixels
64 megapixels
12 megapixels
Maximum lens aperture
1.8
1.8
1.8
Number of rear cameras
3 ​
4 ​
3 ​
Sensor format
1/1.76"
1/1.72"
1/1.76"
Video recording
Yes
Yes
Yes
Max frame rate (highest resolution)
24 fps
Max frame rate (regardless of res.)
960 fps
240 fps
960 fps
Max resolution (highest frame rate)
1280x720 (HD 720) pixels
1920x1080 (HD 1080) pixels
1280x720 (HD 720) pixels
Maximum resolution (video)
7680x4320 (8K Ultra HD) pixels
3840x2160 (4K Ultra HD) pixels
7680x4320 (8K Ultra HD) pixels
2G (GSM)
Yes
Yes
Yes
3G (UMTS)
Yes
Yes
Yes
HSPA+
Yes
Yes
Yes
4G (LTE)
Yes
Yes
Yes
4G: Speed (down/up)
Cat.20/18: 2000/200 Mbit/s
Cat.19/18: 1600/200 Mbit/s
5G (NR)
Yes
No
No
Frequency range (5G)
FR1 (Sub-6 GHz)
Bluetooth
Yes
Yes
Yes
Bluetooth codec
aptX, LDAC, SBC
aptX, SBC
Bluetooth profile
A2DP
A2DP
A2DP, AVRCP, OPP, HFP, HSP, PBAP
Bluetooth version
5.1
5.0
5.0
Built-in navigation system
Yes
Yes
Yes
Type of navigation system
GPS, A-GPS, BeiDou, Galileo, GLONASS
GPS, A-GPS, BeiDou, Galileo, GLONASS
GPS, A-GPS, BeiDou, Galileo, GLONASS
NFC
Yes
Yes
Yes
Wireless network (Wi-Fi)
Yes
Yes
Yes
Wireless networking standard
802.11a, 802.11b, 802.11g, 802.11n (Wi-Fi 4), 802.11ac (Wi-Fi 5), 802.11ax (Wi-Fi 6)
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
USB
USB
Type of USB connector
USB (Type C)
USB (Type C)
USB (Type C)
USB On-The-Go (OTG)
Yes
Yes
Yes
USB version
3 (Gen 1)
2.0
3 (Gen 1)
Headphone output (2.5/3.5 mm)
No
Yes
No
Type of connection
3.5 mm
Colour
Black, Silver, White, Grey, Purple, Pink
Black, Silver, Blue, White
Black, Blue, White, Red, Green, Purple, Orange, Pink
Developed especially for seniors
No
No
No
Physical keyboard/numpad
No
No
No
Dimensions (WxHxD)
Depth
7.9 mm
7.7 mm
8.4 mm
Height
151.7 mm
163.6 mm
159.8 mm
Width
71.2 mm
76 mm
74.5 mm
Product weight
169 g
179 g
190 g
Built-in sensors
Proximity sensor, Accelerometer, Gyroscope, Barometer
Proximity sensor, Accelerometer, Gyroscope, Barometer
Proximity sensor, Accelerometer, Gyroscope, Barometer
Built-in wireless charging
Yes
No
Yes
Wireless standard
QI, PMA
QI
Dual SIM card support
Yes
Yes
Yes
Hybrid Dual Sim
No
No
Yes
Type of Dual SIM
Nano SIM/eSIM, Dual SIM cards
Dual SIM cards
Dual SIM cards
Features
Shock resistant, ANT+, Built-in stereo speakers, Hearing Aid Compatible, Ultra-wideband (UWB)
FM radio, ANT+
Built-in stereo speakers
Security
Fingerprint reader, Face scanner
Fingerprint reader, Face scanner
Fingerprint reader, Face scanner
SIM card
Nano sim
Nano sim
Nano sim
Supports fast charging
Yes
Yes
Yes
Water resistant
Yes
No
Yes
IP code (level of dust/water resistance)
IP68
IP68
Series
Samsung Galaxy S21
Galaxy A70
Galaxy S20
Aspect ratio
20:9
20:9
20:9
Display features
Scratch resistant display, HDR, 120Hz refresh rate
Scratch resistant display, HDR
Scratch resistant display, HDR, 120Hz refresh rate
Display technology
OLED (AMOLED)
OLED (AMOLED)
OLED (AMOLED)
Display
Colour
Colour
Colour
Number of colours
16 777 216 colours
16 777 216 colours
16 777 216 colours
Pixel density
421 PPI
393 PPI
407 PPI
Screen resolution (HxV)
1080x2400 pixels
1080x2400 pixels
1080x2400 pixels
Screen size
6.2 inches
6.7 inches
6.5 inches
Touchscreen
Yes
Yes
Yes
Material (body/chassis)
Aluminium, Plastic
Glass, Plastic
Aluminium, Plastic
RAM size
8GB
6GB
6GB
Keyword
Release year
2021
2020
2021
Battery capacity
4000 mAh
4500 mAh
4500 mAh
Exchangeable battery
No
No
No
Graphics processor (GPU)
Yes
Yes
Yes
Graphics processor type
ARM Mali-G78 MP14
Adreno 618
ARM Mali-G77 MP11
Processor core type
8 (Octa) Core
8 (Octa) Core
8 (Octa) Core
Processor speed
2.9 GHz
2.2 GHz
2.73 GHz
SoC/CPU (System on Chip)
Samsung Exynos 2100
Qualcomm Snapdragon 730 SDM730
Samsung Exynos 990
Support for alternative firmware
Memory card reader
No
Yes
Yes
Compatible memory cards
microSD, microSDHC, microSDXC
microSD, microSDHC, microSDXC
Maximum memory card size
512GB
1TB
Storage space
128 GB
128 GB
128 GB