Google Pixel 9a vs Samsung Galaxy S21

Key Specs

Battery
-	4000 mAh
Display
-	6.2 inches (15.75 cm)
Front Camera
-	10 MP
Processor
-	Samsung Exynos 2100
RAM
-	8 GB
Rear Camera
-	12 MP + 64 MP + 12 MP

Audio

Audio Jack
USB Type-C	-
Loudspeaker
Yes	-

Battery

Capacity
5100 mAh	4000 mAh
Quick Charging
Yes	Yes, Fast, 25W
Removable
No	No
TalkTime
-	Up to 33 Hours(4G)
Type
Li-Polymer	Li-ion
USB Type-C
Yes	Yes
Wireless Charging
Yes	Yes

Camera

Autofocus
Yes, Phase Detection autofocus	-
Flash
Yes, LED Flash	-
Front Camera
13 MP	-
Image Resolution
12000 x 9000 Pixels	-
Rear Camera
48 MP + 13 MP	-
Shooting Modes
Continuous Shooting High Dynamic Range mode (HDR)	-
Video Recording
4K video recording at 30/60 FPS,1080p video recording at 30/60 FPS,Digital zoom up to 5x	-

Design

Build Material
-	Back: Plastic
Colours
-	Phantom Gray, Phantom Violet, Phantom White
Height
-	151.7 mm
Ruggedness
-	Dust proof
Thickness
-	7.9 mm
Waterproof
-	Yes, Water resistant (up to 30 minutes in a depth of 1.5 meter), IP68
Weight
-	169 grams
Width
-	71.2 mm

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Display

Aspect Ratio
20:9	20:9
Bezel-less display
Yes with punch-hole display	Yes with punch-hole display
Brightness
-	1300 nits
Display Type
OLED	Dynamic AMOLED 2x
HDR 10 / HDR+ support
-	Yes, HDR 10+
Pixel Density
422.2 ppi	424 ppi
Refresh Rate
120 Hz	120 Hz
Resolution
13 MP selfie camera,ƒ/2.2 aperture,96.1° ultrawide field of view	1080x2400 px (FHD+)
Screen Protection
-	Corning Gorilla Glass, Glass Victus
Screen Size
6.3 inches (16 cm)	6.2 inches (15.75 cm)
Screen to Body Ratio (calculated)
-	85.92 %
Touch Screen
-	Yes, Capacitive Touchscreen, Multi-touch

Front Camera

Autofocus
-	Yes, Phase Detection autofocus
Camera Setup
-	Single
Resolution
-	10 MP f/2.2, Wide Angle, Primary Camera(26 mm focal length, 3.2" sensor size, 1.22µm pixel size)
Video Recording
-	3840x2160 @ 30 fps

General

Brand
Google	Samsung
Custom UI
-	Samsung One UI
Launch Date
March 19, 2025	January 27, 2021
Operating System
Android 15	Android v11

Main Camera

Autofocus
-	Yes, Phase Detection autofocus, Dual Pixel autofocus
Camera Features
-	Digital Zoom Auto Flash Face detection Touch to focus
Camera Setup
-	Triple
Flash
-	Yes, LED Flash
Image Resolution
-	4000 x 3000 Pixels
OIS
-	Yes
Resolution
-	12 MP f/1.8, Wide Angle, Primary Camera(26 mm focal length, 1.7" sensor size, 1.8µm pixel size)64 MP f/2.0, Telephoto Camera(28 mm focal length, 1.7" sensor size, 0.8µm pixel size)12 MP f/2.2, Ultra-Wide Angle Camera(13 mm focal length, 2.55" sensor size, 1.4µm pixel size)
Settings
-	Exposure compensation, ISO control
Shooting Modes
-	Continuous Shooting High Dynamic Range mode (HDR)
Video Recording
-	7680x4320 @ 24 fps 3840x2160 @ 30 fps 1920x1080 @ 60 fps 1280x720 @ 960 fps
Video Recording Features
-	Slo-motion Bokeh portrait video Video Pro Mode Stereo recording

Multimedia

Audio Jack
-	USB Type-C
FM Radio
-	No
Loudspeaker
-	Yes
Stereo Speakers
-	Yes

Network & Connectivity

Bluetooth
Yes, v5.3	Yes, v5.0
GPS
Yes, GPS, GLONASS, Galileo, Beidou, QZSS, NavIC	Yes with A-GPS, Glonass
NFC
Yes	Yes
Network Support
5G Supported in India, 4G Supported in India, 3G, 2G	5G Supported in India, 4G Supported in India, 3G, 2G
SAR Value
-	Head: 0.74 W/kg, Body: 1.08 W/kg
SIM 1
5G Bands: FDD N1 / N2 / N3 / N5 / N7 / N8 / N12 / N20 / N25 / N28 TDD N40 / N41 / N66 / N75 / N77 / N78 / N79 4G Bands: TD-LTE 2300(band 40) FD-LTE 1800(band 3) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	5G Bands: FDD N1 / N3 / N5 / N7 / N8 / N20 / N28 TDD N38 / N40 / N41 / N66 / N77 / N78 4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39) FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 13) / 700(band 17) / 850(band 18) / 850(band 19) / 800(band 20) / 1900(band 25) / 850(band 26) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available
SIM 2
4G Bands: TD-LTE 2300(band 40) FD-LTE 1800(band 3) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39) FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 13) / 700(band 17) / 850(band 18) / 850(band 19) / 800(band 20) / 1900(band 25) / 850(band 26) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available
SIM Size
Single Nano SIM and eSIM	SIM1: Nano, SIM2: Nano
SIM Slot(s)
Dual SIM, GSM+GSM	Dual SIM, GSM+GSM
USB Connectivity
-	Mass storage device, USB charging
VoLTE
Yes	Yes
Wi-Fi
Yes, 6E with 2.4GHz+5GHz+6GHz, 2x2 MIMO	Yes, Wi-Fi 6 (802.11 a/b/g/n/ac/ax) 5GHz, MIMO
Wi-Fi Features
-	Wi-Fi Direct, Mobile Hotspot

Performance

Architecture
-	64 bit
CPU
-	Octa core (2.9 GHz, Single core, Cortex X1 + 2.8 GHz, Tri core, Cortex A78 + 2.2 GHz, Quad core, Cortex A55)
Chipset
-	Samsung Exynos 2100
Fabrication
-	5 nm
Graphics
Mali-G78 MP20	Mali-G78 MP14
Processor
Google Tensor G4	-
RAM
8 GB	8 GB
RAM Type
-	LPDDR5
RAM type
-	LPDDR5

Sensors

Fingerprint Sensor
Yes	Yes
Fingerprint Sensor Position
-	On-screen
Fingerprint Sensor Type
-	Ultrasonic
Other Sensors
Proximity sensor,Ambient light sensor,Accelerometer,Gyrometer,Magnetometer,Barometer	Light sensor, Proximity sensor, Accelerometer, Barometer, Compass, Gyroscope

Storage

Expandable Memory
-	No
Internal Memory
256 GB	128 GB
Storage Type
UFS 3.1	UFS 3.1
USB OTG
-	Yes
User Available Storage
-	Up to 102 GB