Samsung Galaxy A21s vs. ASUS Zenfone 8

Phone Comparison, Reviews and Tests

In depth comparison and review of Samsung Galaxy A21s and ASUS Zenfone 8. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.

Phone Specifications Comparison

Samsung Galaxy A21s vs. ASUS Zenfone 8 Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy A21s ASUS Zenfone 8
Product Type Smartphone Smartphone
Manufacturer Model Number SM-A217F/DSN ZS590KS
Form Factor Touch Touch
Height 163.7 mm 148 mm Samsung Galaxy A21s has greater height than ASUS Zenfone 8.
Width 75.3 mm 68.5 mm Samsung Galaxy A21s has greater width than ASUS Zenfone 8.
Depth 8.9 mm 8.9 mm Both phones are the same depth.
Weight 192 g 169 g ASUS Zenfone 8 is lighter than Samsung Galaxy A21s.
Body Colour White | Blue | Black Obsidian black
Protection - Drop-proof, water-resistant, dust-resistant
Waterproof (Water-resistant) - Yes ASUS Zenfone 8 is waterproof.
IP rating - IP68, IP65
SAR Value 1.544 W/kg (body), 0.422 W/kg (head), 2.21 W/kg (limb) 1.582 W/kg (body), 1.412 W/kg (head), 3.498 W/kg (limb)
Integrated Components - FM radio
Connector Type USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
SIM Card Type (Size) Nano SIM Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Samsung Galaxy A21s ASUS Zenfone 8
Display Type LCD display OLED display
Display Technology PLS TFT AMOLED
Screen Size (Display Size) 6.5" 5.9" Samsung Galaxy A21s has larger screen size than ASUS Zenfone 8.
Screen Resolution (Display Resolution) 1600 x 720 pixels 2400 x 1080 pixels ASUS Zenfone 8 has better screen resolution than Samsung Galaxy A21s.
Display Format HD+ Full HD+
Aspect Ratio 20:9 20:9
Max Brightness - 1100 cd/m²
Colour Depth 16.7 million colours -
HDR - Yes ASUS Zenfone 8 has HDR.
HDR Technology - HDR10+
Display Enhancement Technology - DC Dimming
Display Refresh Rate - 120 Hz
Touch Sampling Rate - 240 Hz
Display Features Infinity O display Always-on display, Glove Touch, Delta-E < 1, 107% NTSC, 151.9% sRGB, 112% DCI-P3
Display Protection (Screen Protector) - Corning Gorilla Glass Victus (scratch resistant glass)
PROCESSOR Samsung Galaxy A21s ASUS Zenfone 8
Processor Type (CPU) - Qualcomm Snapdragon 888 5G
Clock Speed 2 GHz 2.842 GHz ASUS Zenfone 8 has higher clock speed than Samsung Galaxy A21s.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
Graphics System (GPU) - Qualcomm ADRENO 660
MEMORY Samsung Galaxy A21s ASUS Zenfone 8
RAM 3 GB LPDDR5 SDRAM - 8 GB ASUS Zenfone 8 has more RAM than Samsung Galaxy A21s.
Internal Memory Size (Storage Capacity) 32 GB 128 GB ASUS Zenfone 8 has more internal memory than Samsung Galaxy A21s.
User Memory 19.5 GB -
Memory Interface - UFS 3.1
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 512 GB -
CAMERA Samsung Galaxy A21s ASUS Zenfone 8
MAIN CAMERA
Number of Main Cameras 4 2
Sensor Resolution 48 Megapixel 64 Megapixel ASUS Zenfone 8 has better camera resolution than Samsung Galaxy A21s.
Sensor Size - 1/1.7"
Sensor Name - Sony Exmor RS IMX686 sensor
Lens Type Wide-angle lens Wide-angle lens
Lens Aperture F/2.0 F/1.8 ASUS Zenfone 8 has better lens aperture than Samsung Galaxy A21s.
Field of View (FoV) 80 degree(s) 78.3 degree(s) Samsung Galaxy A21s has larger lens field of view than ASUS Zenfone 8.
Pixel Size - 1.6 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) ASUS Zenfone 8 has optical stabilisation.
Focus Adjustment Automatic -
Minimum Focal Length (Focal Distance) - 26.6 mm
Digital Zoom 8x -
Camera Modes Live Focus mode Slow motion video, Time-lapse mode, Pro mode
Light Source LED flash LED flash
Video Resolutions 1920 x 1080 (1080p) at 30 fps 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Slo-mo video 1280 x 720 (720p) at 480 fps, 7680 x 4320 (8K) at 24 fps, Slo-mo video 3840 x 2160 (4K) at 120 fps
Camera Features (Functions) Live Focus Phase Detect Auto-Focus (PDAF), 3-axis electronic image stabilisation, 4-axis optical image stabilisation, Motion tracking, Quad Bayer technology, 2x1 On-Chip Lens (OCL)
SECOND CAMERA
Sensor Resolution (2nd Camera) 8 Megapixel 12 Megapixel ASUS Zenfone 8 has better second camera resolution than Samsung Galaxy A21s.
Sensor Size (2nd Camera) - 1/2.55"
Sensor Name (2nd Camera) - Sony Exmor RS IMX363 sensor
Lens Type (2nd Camera) Ultra wide-angle lens Ultra wide-angle lens
Lens Aperture (2nd Camera) F/2.2 F/2.2 Both phones have the same second camera lens aperture.
Field of View (2nd Camera) 123 degree(s) -
Pixel Size (2nd Camera) - 1.4 μm
Focal Length Equivalent to 35mm Camera - 14.3
Camera Features (2nd Camera) - Real-time distortion correction, 4cm macro photography, Dual Phase Detect Auto-Focus (PDAF)
THIRD CAMERA
Sensor Resolution (3rd Camera) 2 Megapixel -
Lens Aperture (3rd Camera) F/2.4 -
Camera Functions (3rd Camera) Macro camera -
Camera Features (3rd Camera) 4cm macro photography -
FOURTH CAMERA
Sensor Resolution (4th Camera) 2 Megapixel -
Lens Aperture (4th Camera) F/2.4 -
Camera Functions (4th Camera) Depth camera -
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 13 Megapixel 12 Megapixel Samsung Galaxy A21s has better front camera resolution than ASUS Zenfone 8.
Sensor Name (Front) - Sony Exmor RS IMX663 sensor
Lens Aperture (Front) F/2.2 F/2.4 Samsung Galaxy A21s has better front lens aperture than Samsung Galaxy A21s.
Pixel Size (Front) - 1.22 μm
Focus Adjustment Focus free Automatic
Camera Modes (Front) - Portrait
Camera Features (Front) - Dual Pixel technology, EIS video stabilisation, Dual Phase Detect Auto-Focus (PDAF)
BATTERY AND CHARGING Samsung Galaxy A21s ASUS Zenfone 8
Battery Capacity (Battery Size) 5000 mAh 4000 mAh Samsung Galaxy A21s has larger battery capacity than ASUS Zenfone 8.
Fast Charging Technology - Qualcomm Quick Charge 4.0, Power Delivery 3.0 ASUS Zenfone 8 has fast charging technology.
Talk Time 3240 minutes -
Run Time Details Active online usage (4G): up to 23 hrs
Active online usage (Wi-Fi): up to 23 hrs
Playback (video): up to 21 hrs
Playback (audio): up to 109 hrs
Talk (4G): up to 3240 min
-
Battery Technology Lithium Ion -
CELLULAR Samsung Galaxy A21s ASUS Zenfone 8
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 5G ASUS Zenfone 8 has more advanced generation mobile network.
Operating System - Android 11
User Interface One UI ASUS ZenUI 8.0
Navigation GPS, GLONASS, BeiDou, Galileo GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC
COMMUNICATIONS Samsung Galaxy A21s ASUS Zenfone 8
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE GPRS, EDGE, HSPA+, FDD-LTE, TDD-LTE, DC-HSPA+, Gigabit LTE, 5G NR FR1
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
3G UMTS Band Band 1, Band 2, Band 5, Band 8 Band 1, Band 2, Band 3, Band 4, Band 5, Band 6, Band 8, Band 19
3G UMTS Frequency 2100, 1900, 850, 900 2100, 1900, 1800, 1700, 850, 800, 900, 800
4G LTE Band Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 34, Band 38, Band 39, Band 40, Band 41, Band 42
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 3500
5G NR Band - N1, n2, n3, n5, n7, n8, n20, n28, n38, n77, n78, n12
5G NR Frequency - FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 3700, TDD TD 3500, n12
Wireless Interface IEEE 802.11a/b/g/n/ac IEEE 802.11a/b/g/n/ac/ax
Bluetooth Bluetooth 5.0 LE Bluetooth 5.2 EDR
Bluetooth Profiles - HFP, OPP, PAN, A2DP, AVRCP, HID
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Modem - Snapdragon X60 5G
Messaging Services SMS, MMS -
MEDIA Samsung Galaxy A21s ASUS Zenfone 8
Supported Digital Audio Standards WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID -
Supported Digital Video Standards MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 -
Sound Enhancements Dolby Atmos sound technology Dirac HD Sound, ASUS Audio Wizard, Hi-Res audio certified, OZO Audio, Qualcomm aptX audio, Qualcomm aptX HD audio, Qualcomm aptX Adaptive
Audio Amplifier - Dual Cirrus Logic CS35L45
FEATURES Samsung Galaxy A21s ASUS Zenfone 8
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert -
Sensors Accelerometer, proximity sensor, gyro sensor, geomagnetic sensor Accelerometer, ambient light sensor, proximity sensor, digital compass, G-sensor, gyroscope
Security Devices Face recognition, fingerprint reader Fingerprint reader (under display), face recognition
Additional Phone Features Samsung KNOX, Virtual Light Sensing MIMO technology, AudioWizard, One Hand Mode, ARCore, Triple internal microphones with ASUS Noise Reduction Technology, Multi-Magnet Stereo Speakers
OTHERS Samsung Galaxy A21s ASUS Zenfone 8
Included Accessories Power adapter SIM card removal tool, USB-C to USB-C cable, protective case, power adapter (30 W)
Compliant Standards - IP68, IP65, SGS Eye Care Display Certification, SGS Seamless Pro 120Hz Certification
Max Height of Shock Resistance - 2 m
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