Samsung Galaxy S21 vs Samsung Galaxy A12 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

8.5
Samsung Galaxy S21
Samsung Galaxy S21 Samsung Galaxy A12
Released · Jan 29, 2021
Released · Dec 21, 2020
6.2-inch · 2400 x 1080 px
6.5-inch · 1600 x 720 px
12 MP Main · 10 MP Selfie
48 MP Main · 8 MP Selfie
8GB · 128GB
4GB · 64GB
4000 mAh
5000 mAh
Check prices Check prices

Display

Size
6.2-inch 6.5-inch
Resolution
2400 x 1080 px, 20:9 ratio, 424 PPI 1600 x 720 px, 20:9 ratio, 270 PPI
Technology
Dynamic AMOLED LCD
Refresh rate
120Hz (adaptive)
Screen-to-body
86.06 % 85.80 %
Peak brightness
1300 cd/m2 (nit)
Features
HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 888 (5 nm) Mediatek Helio P35 MT6765 (12 nm)
Processor
Octa-core, 1x 2.84GHz Kryo 680 + 3x 2.42GHz Kryo 680 + 4x 1.80GHz Kryo 680, 64-bit Octa-core, 4x 2.3GHz Cortex-A53 + 4x 1.8GHz Cortex-A53, 64-bit
GPU
Adreno 660 PowerVR GE8320
RAM
8GB (LPDDR5) 4GB (LPDDR4)
Internal storage
128GB (UFS 3.0), not expandable 64GB (eMMC 5.1), available to use: 48.2 GB
Storage expansion
microSDXC up to 1024 GB
OS
Android (13, 12, 11), Samsung One UI Android (10), Samsung One UI UI
Device type
Smartphone Smartphone

Battery

Capacity
4000 mAh 5000 mAh
Type
Li - Polymer, Not user replaceable Li - Polymer, Not user replaceable
Charging
Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging Samsung Adaptive Fast Charging
Max charge speed
Wired: 25.0W
Wireless: 15.0W
Wired: 15.0W
PhoneArena Battery Tests
Battery Life Estimate
4h 28min
Browsing
7h 47min
Video
7h 36min
Gaming
7h 9min
Battery Life Estimate
Untested
Browsing
Untested
Video
Untested
Gaming
Untested

Camera

Rear
Triple camera Quad camera
Main camera
12 MP (OIS, PDAF)
Specifications:
Aperture size: F1.8
Focal length: 26 mm
Sensor size: 1/1.76"
Pixel size: 1.8 μm
48 MP (Autofocus)
Specifications:
Aperture size: F2.0
Focal length: 26 mm
Second camera
64 MP (Telephoto, OIS, PDAF)
Specifications:
Aperture size: F2.0
Focal Length: 29 mm
Sensor size: 1/1.7"
Pixel size: 0.8 μm
5 MP (Ultra-wide)
Specifications:
Aperture size: F2.2
Third camera
12 MP (Ultra-wide, Autofocus)
Specifications:
Aperture size: F2.2
Focal Length: 13 mm
Sensor size: 1/2.55"
Pixel size: 1.4 μm
2 MP (Macro)
Specifications:
Aperture size: F2.4
Fourth camera
2 MP (Depth information)
Specifications:
Aperture size: F2.4
Flash
LED LED
Video recording
7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)
Features:
OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS
1920x1080 (Full HD) (30 fps)
Front
10 MP (PDAF, HDR), Video capture: 3840x2160 (4K UHD) (60 fps) 8 MP

Design

Dimensions
5.97 x 2.80 x 0.31 inches
(151.7 x 71.2 x 7.9 mm)
6.46 x 2.98 x 0.35 inches
(164 x 75.8 x 8.9 mm)
Weight
6.03 oz(171.0 g) 7.23 oz(205.0 g)
Materials
Back: Plastic
Frame: Aluminum
Back: Plastic
Frame: Plastic
Resistance
Water, Dust; IP68
Biometrics
2D Face unlock, Ultrasonic in-screen fingerprint Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key Right: Volume control, Lock/Unlock key
Colors
Phantom pink, Violet, Gray, White Black, White, Blue, Red

Cellular

5G
Bands n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
4G (FDD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 66(AWS-3), 71(600) Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
4G (TDD)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600) Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900) Bands 1(2100), 5(850), 8(900)
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS LTE, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
No
SIM type
Nano SIM Nano SIM

Multimedia

Headphones
No 3.5mm jack 3.5mm jack
Speakers
Earpiece, Multiple speakers Earpiece, Loudspeaker
Features
32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus
Screen mirroring
Wireless screen share Wireless screen share,MirrorLink
Radio
FM, Stereo, RDS
Additional microphone(s)
Noise cancellation, Video recording

Connectivity & Features

Bluetooth
5.0 5.0
Wi-Fi
802.11 a,b,g,n,ac,ax(Wi-Fi 6),dual-band
MIMO, Wi-Fi Direct, Hotspot
802.11 b,g,n
Wi-Fi Direct, Hotspot
USB
Type-C (reversible), USB 3.2, Features: Charging, Headphones port, OTG, Video out Type-C (reversible), USB 2.0, Features: Charging, Mass storage device
Hearing aid compatible
M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer Accelerometer
Other
NFC, ANT+ NFC

Regulatory Approval

FCC approval
Date approved: Dec 08, 2020
FCC ID value: A3LSMG991U
Date approved: Mar 11, 2021
FCC ID value: A3LSMA125U
Measured SAR
Head: 0.36 W/kg
Body: 1.08 W/kg
Simultaneous Transmission: 3.96 W/kg
Wireless Router: 1.09 W/kg
Phablet: 2.49 W/kg
Head: 1.14 W/kg
Body: 1.20 W/kg
Simultaneous Transmission: 1.59 W/kg
Wireless Router: 1.34 W/kg

Buyers information

MSRP
$ 800 € 179
In The Box
C to C Data Cable, Ejection Pin Power brick, USB cable, Headphones, Sim card extraction tool

Availability

Officially announced
Jan 14, 2021 Nov 24, 2020

Alternative variants

with 256GB storage
Internal storage 256GB
With 32GB storage
RAM 3GB
Internal storage 32GB
for Europe
System chip Samsung Exynos 2100 (5 nm)
Processor Octa-core, 2900 MHz, 1x 2.91GHz Cortex-X1 + 3x 2.81GHz Cortex-A78 + 4x 2.2GHz Cortex-A55, 64-bit
GPU Mali G78 MP14
Weight 5.96 oz(169.0 g)
5G Bands SA, NSA, Sub-6
FCC approval Date approved: Dec 18, 2020
FCC ID value: A3LSMG991B
Measured SAR Head: 0.42 W/kg
Body: 0.94 W/kg
Simultaneous Transmission: 3.96 W/kg
Wireless Router: 1.34 W/kg
Phablet: 2.37 W/kg
With 128GB storage
RAM 6GB
Internal storage 128GB
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