Samsung Galaxy A51 vs. Samsung Galaxy S21 FE 5G

Phone Comparison, Reviews and Tests

Side by side comparison and review of Samsung Galaxy A51 and Samsung Galaxy S21 FE 5G. Compare sizes, cameras, batteries, memory capacities and other key specifications and features to simplify the choice of your perfect phone. Our goal is to make it easier for you to decide on the phone that will best meet your expectations by revealing the main differences between the products.

Phone Specifications Comparison

Samsung Galaxy A51 vs. Samsung Galaxy S21 FE 5G Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Product Type Smartphone Smartphone
Manufacturer Model Number SM-A515F/DSN SM-G990B/DS
Form Factor Touch Touch
Height 158.5 mm 155.7 mm Samsung Galaxy A51 has greater height than Samsung Galaxy S21 FE 5G.
Width 73.6 mm 74.5 mm Samsung Galaxy S21 FE 5G has greater width than Samsung Galaxy A51.
Depth 7.9 mm 7.9 mm Both phones are the same depth.
Weight 172 g 177 g Samsung Galaxy A51 is lighter than Samsung Galaxy A51.
Body Colour Silver | Prism crush black | Haze crush silver | Prism crush blue | Prism crush white Olive | Graphite | White | Lavender
Protection - Dustproof, splashproof, water-resistant
Waterproof (Water-resistant) - -
IP rating - IP68
SAR Value 0.369 W/kg (head), 1.59 W/kg (body), 2.93 W/kg (limb) 1.48 W/kg (body), 0.952 W/kg (head), 2.91 W/kg (limb)
Connector Type USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
SIM Card Type (Size) Nano SIM Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Display Type OLED display OLED display
Display Technology Super AMOLED Infinity-O Dynamic AMOLED 2X
Screen Size (Display Size) 6.5" 6.4" Samsung Galaxy A51 has larger screen size than Samsung Galaxy S21 FE 5G.
Screen Resolution (Display Resolution) 2400 x 1080 pixels 2340 x 1080 pixels Samsung Galaxy A51 has better screen resolution than Samsung Galaxy S21 FE 5G.
Display Format Full HD+ Full HD+
Pixel Density 408 ppi 401 ppi Samsung Galaxy A51 has better pixel density than Samsung Galaxy S21 FE 5G.
Colour Depth 16.7 million colours 16.7 million colours Both phones have the same color depth.
HDR Technology - HDR10+
Display Enhancement Technology - Eye Comfort Shield
Display Refresh Rate - 120 Hz
Display Features Edge-to-Edge screen, Infinity O display AOD(Always On Display), Infinity O display, Video Wallpaper
Display Protection (Screen Protector) - Corning Gorilla Glass Victus (scratch resistant glass)
PROCESSOR Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Processor Type (CPU) Samsung Exynos 9611 -
Clock Speed 2.3 GHz 2.84 GHz Samsung Galaxy S21 FE 5G has higher clock speed than Samsung Galaxy A51.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
64-bit Architecture Yes - Samsung Galaxy A51 has 64-bit architecture.
MEMORY Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
RAM 4 GB 6 GB Samsung Galaxy S21 FE 5G has more RAM than Samsung Galaxy A51.
Internal Memory Size (Storage Capacity) 128 GB 128 GB Both phones have the same internal memory capacity.
User Memory 107 GB 101.1 GB
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 512 GB -
CAMERA Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
MAIN CAMERA
Number of Main Cameras 4 3
Sensor Resolution 48 Megapixel 12 Megapixel Samsung Galaxy A51 has better camera resolution than Samsung Galaxy S21 FE 5G.
Sensor Size - 1/1.76"
Lens Type - Wide-angle lens
Lens Aperture F/2.0 F/1.8 Samsung Galaxy S21 FE 5G has better lens aperture than Samsung Galaxy A51.
Field of View (FoV) - 79 degree(s)
Pixel Size - 1.8 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) Samsung Galaxy S21 FE 5G has optical stabilisation.
Focus Adjustment Automatic Automatic
Optical Zoom - 3x
Digital Zoom 8x 30x Samsung Galaxy S21 FE 5G has better digital zoom than Samsung Galaxy A51.
Special Effects - Face retouch, Grid Line
HDR Mode - Auto HDR mode
Camera Modes Slow motion mode, Live Focus mode Night mode, portrait mode
Light Source LED flash LED flash
Video Resolutions Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1280 x 720 (720p) at 960 fps
Camera Features (Functions) AR sticker, background blur, Scene Optimiser, Eye blink, Flaw detection, Stamp, Facial blur Dual recording
SECOND CAMERA
Sensor Resolution (2nd Camera) 12 Megapixel 12 Megapixel Both phones have the same second camera resolution.
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) 123 degree(s) Both phones have the same second camera lens field of view.
Pixel Size (2nd Camera) - 1.12 μm
THIRD CAMERA
Sensor Resolution (3rd Camera) 5 Megapixel 8 Megapixel Samsung Galaxy S21 FE 5G has higher resolution third camera than Samsung Galaxy A51.
Lens Type (3rd Camera) - Telephoto lens
Lens Aperture (3rd Camera) F/2.4 F/2.4 Both phones have the same lens aperture of the third camera.
Field of View (3rd Camera) - 32 degree(s)
Pixel Size (3rd Camera) - 1 μm
Camera Functions (3rd Camera) Macro camera -
Camera Features (3rd Camera) - Space Zoom x30
FOURTH CAMERA
Sensor Resolution (4th Camera) 5 Megapixel -
Lens Type (4th Camera) Telephoto lens -
Lens Aperture (4th Camera) F/2.2 -
Camera Functions (4th Camera) Depth camera -
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 32 Megapixel 32 Megapixel Both phones have the same front camera resolution.
Lens Aperture (Front) F/2.2 F/2.2 Both phones have the same front camera lens aperture.
Field of View (Front) - 81 degree(s)
Pixel Size (Front) - 0.8 μm
Focus Adjustment Focus free Focus free
BATTERY AND CHARGING Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Battery Capacity (Battery Size) 4000 mAh 4500 mAh Samsung Galaxy S21 FE 5G has larger battery capacity than Samsung Galaxy A51.
Fast Charging Technology - Samsung Fast Charging Samsung Galaxy S21 FE 5G has fast charging technology.
Wireless Charging - Yes Samsung Galaxy S21 FE 5G can be charged wirelessly.
Wireless Charging Standards - Wireless PowerShare
Talk Time 1920 minutes 2220 minutes Samsung Galaxy S21 FE 5G has longer battery life when making calls than Samsung Galaxy A51.
Run Time Details Active online usage (LTE): up to 15 hrs
Active online usage (Wi-Fi): up to 16 hrs
Playback (video): up to 20 hrs
Playback (audio): up to 87 hrs
Talk (4G): up to 1920 min
Talk (LTE): up to 2220 min
Active online usage (LTE): up to 13 hrs
Active online usage (Wi-Fi): up to 13 hrs
Playback (video): up to 16 hrs
Playback (audio): up to 79 hrs
Battery Technology Lithium Ion -
CELLULAR Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 5G Samsung Galaxy S21 FE 5G has more advanced generation mobile network.
Operating System Android 10 Android 12
User Interface One UI -
Intelligent Assistant Bixby Bixby
Payment Technology - Samsung Pay
Navigation GPS, GLONASS, BeiDou, Galileo GPS, GLONASS, BeiDou, Galileo, QZSS
COMMUNICATIONS Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE FDD-LTE, TDD-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 4, Band 5, Band 8 Band 1, Band 2, Band 4, Band 5, Band 8
3G UMTS Frequency 2100, 1900, 1700, 850, 900 2100, 1900, 1700, 850, 900
4G LTE Band Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 20, Band 26, Band 28, Band 38, Band 40, Band 41, Band 66 Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 20, Band 26, Band 28, Band 32, Band 38, Band 40, Band 41, Band 66
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 DD, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3
5G NR Band - N1, n3, n5, n7, n8, n20, n28, n38, n41, n66, n78, n40
5G NR Frequency - FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, TDD TD 3500, TDD 2300
Wireless Interface IEEE 802.11a/b/g/n/ac, ANT+ IEEE 802.11a/b/g/n/ac
Bluetooth Bluetooth 5.0 LE Bluetooth 5.0
Bluetooth Profiles HFP, HSP, OPP, PAN, A2DP, AVRCP, HID, SAP, PBAP, MAP, HOGP -
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Messaging Services SMS, MMS -
MEDIA Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Supported Digital Audio Standards WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID WAV, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID
Supported Digital Video Standards MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 MKV, FLV, AVI, 3GP, M4V, WebM, 3G2, MP4
Sound Enhancements - Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound
FEATURES Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert -
Sensors Accelerometer, ambient light sensor, proximity sensor, gyro sensor, hall sensor, geomagnetic sensor Accelerometer, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor, light sensor
Security Devices Fingerprint reader (under display) Fingerprint reader
Additional Phone Features Fast Charging, Samsung KNOX, Bixby Vision, Game Booster, Bixby Routines MIMO technology, Fast Charging, Samsung KNOX, Samsung DeX support, Samsung Smart Switch, Game mode
OTHERS Samsung Galaxy A51 Samsung Galaxy S21 FE 5G
Included Accessories Power adapter SIM card removal tool, USB-C cable
Compliant Standards - IP68
Max Depth of Water Resistance - 1.5 m
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