Xiaomi Redmi Note 8 (32GB/3GB) vs Samsung Galaxy A51 (SM-A515F/DSM 128GB)

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Side by side comparison between Xiaomi Redmi Note 8 vs Samsung Galaxy A51 phones, differences, pros, cons and full specifications. What's the better?

1/4/2020 4:27 PM, updated: 11/21/2022 8:39 AM

Compare Samsung Galaxy A51 X Xiaomi Redmi Note 8 (32GB/3GB) 05Points

Specifications Compare Models Pictures

6.3"
IPS

1080x2340

48
MP

13mp

3GB
RAM

Octa-core

4000
mAh

(Non removable)

14Points Samsung Galaxy A51 (SM-A515F/DSM 128GB) Compare Xiaomi Redmi Note 8 X

Specifications Compare Models Pictures

6.5"
AMOLED

1080x2400

48
MP

32mp

6GB
RAM

Octa-core

4000
mAh

(Non removable)

What's the better phone? Samsung Galaxy A51 (SM-A515F/DSM 128GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

5 Advantages Xiaomi Redmi Note 8 (32GB/3GB)	vs	14 Advantages Samsung Galaxy A51 (SM-A515F/DSM 128GB)
+409 PPI1% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	405 PPI
+f/1.8 (aperture)11% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.	vs	f/2.0 (aperture)
+Proximity sensorAdvantage Sensors help you use the device	vs	Virtual proximity sensor
+18W20% More power (watts) to charge the battery faster. Sometimes, the charger that comes with the device doesn't have the same power supported by the device. Check before you buy it.	vs	15W
+P2i certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example	vs	Not supported
2GHz 64bit Octa-core (11nm)	vs	+2.3GHz 64bit Octa-core (10nm)3% More powerful processor, you can open your applications faster
3GB LPDDR4X	vs	+6GB LPDDR4X100% More RAM memory. Typically more responsive and better for multitasking.
32GB (21GB available)	vs	+128GB (107GB available)4 times More internal storage for applications and files
190 grams (6.65 ounces)	vs	+172 grams (6.02 ounces)10% Lighter
8.35 millimeters (0.33 inches)	vs	+7.9 millimeters (0.31 inches)6% Thinner
TFT IPS LCD	vs	+Super AMOLEDAdvantage Super AMOLED display is brighter and more vivid
1080x2340 pixels	vs	+1080x2400 pixels3% Higher resolution screen
6.3"	vs	+6.5"3% Larger screen
(quad camera) 48MP + 8MP + 2MP + 2MP	vs	+(quad camera) 48MP + 12MP + 5MP + 5MP17% Higher resolution main camera
(front) 13MP	vs	+(front) 32MP150% Higher resolution secondary camera to take pictures and selfies
(front) Full HD (1920x1080)	vs	+(front) 4K UHD (3840x2160)3 times More image quality for recording videos with the secondary camera
Android 9.0 Pie	vs	+Android 13Advantage Android 13 is newer and safer
Not supported	vs	+ANT+Advantage Sensors help you use the device
4.2 + A2DP	vs	+5.0 + A2DP/LEAdvantage Bluetooth 5.0 + A2DP/LE is newer and faster

32 Common items in both devices

eMMC 5.1

Until 512GB microSD, microSDXC / Until 1TB microSD, microSDXC

Plastic body, glass front/back / Plastic body, glass front

60Hz

16 million

LED flash

Only digital zoom

+25 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences

📱 Model features
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Change model		Choose the model
Model	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Other model names	Mi Redmi Note 8 (3GB RAM) M1908C3JG, M1908C3JE, M1908C3JH	Samsung Galaxy A51 SM-A515F/DSM
Country or region available	(Global, International)	Kazakhstan, Russia
Brand	Xiaomi	Samsung
Release date	9/26/2019	12/16/2019, Announced: 12/12/2019
Depth	8.35 millimeters (0.33 inches)	7.9 millimeters (0.31 inches)
Size (width x height)	75.3 x 158.3 millimeters (2.96 x 6.23 in)	73.6 x 158.5 millimeters (2.9 x 6.24 in)
Weight	190 grams (6.65 ounces)	172 grams (6.02 ounces)
Build, materials	Plastic body, glass front/back	Plastic body, glass front
Protection against water and others	P2i certified: water repellent nano-coating	Not supported
📲 Display
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Display type	TFT IPS LCD	Super AMOLED
Screen size	6.3" inches	6.5" inches
Screen-to-body ratio	~81.7% (screen-to-body ratio)	~87.4% (screen-to-body ratio)
Display resolution	1080x2340 pixels (19.5:9)	1080x2400 pixels (20:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	409 PPI	405 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 5	Gorilla Glass 3
Refresh rate	60Hz	60Hz
Display features	Not supported	Always-On Display
🤖 Operating System
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
System version	Android 9.0 Pie	Android 10
Firmware update	feature not registered	Android 13
User Interface	feature not registered	One UI 2.5 / 3.1 / 4.1 / 5.0
⚙️ Processor
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Chipset	64bit: Qualcomm Snapdragon 665 (SM6125) (11nm)	64bit: Samsung Exynos 9611 (10nm)
CPU	Octa-core, 2 processors: 4x 2GHz Kryo 260 Gold (Quad-core) 4x 1.8GHz Kryo 260 Silver (Quad-core)	Octa-core, 2 processors: 4x 2.3GHz ARM Cortex-A73 (Quad-core) 4x 1.7GHz ARM Cortex-A53 (Quad-core)
GPU graphical controller	Qualcomm Adreno 610	ARM Mali-G72 MP3 (850MHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
RAM memory	3GB LPDDR4X	6GB LPDDR4X
Internal storage	32GB (21GB available) eMMC 5.1	128GB (107GB available) eMMC 5.1
External storage	Until 512GB microSD, microSDXC (dedicated slot)	Until 1TB microSD, microSDXC (dedicated slot)
📶 Mobile networks
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Dual-SIM	Dual-SIM Standby - Call active on one sim card (dedicated slot)	Dual-SIM Standby - Call active on one sim card (dedicated slot)
SIM card	2 slots (Dual-SIM) nano-SIM (4FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	600/150 Mbps	600/150 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Primary 3G network	M1908C3JG version: UMTS 850/900/1700/1900/2100 M1908C3JE, M1908C3JH versions: UMTS 850/900/1900/2100	UMTS 850/900/1700/1900/2100
Primary 4G network	LTE Cat12/13 VoLTE M1908C3JG version: LTE (Bands 1, 2, 3, 4, 5, 7, 8, 20, 28) TD-LTE (Bands 38, 40) M1908C3JE, M1908C3JH versions: LTE (Bands 1, 3, 5, 8) TD-LTE (Bands 40, 41)	LTE Cat12/13 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66) TD-LTE (38, 40, 41) VoLTE
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	Not supported	Not supported
Secondary 4G network	Not supported	Not supported
Secondary data network	GPRS, EDGE	GPRS, EDGE
📷 Camera
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Back camera (main camera)	(quad camera) 48 megapixels 8MP ultrawide f/2.213mm1/4"1.12µm 2MP macro f/2.41/5"1.75µm 2MP depth f/2.41/5"1.75µm	(quad camera) 48 megapixels 12MP ultrawide f/2.213mm1.12µm 5MP telephoto f/2.440mm 5MP depth f/2.21/5.0"1.12µm
Main camera resolution	8000x6000 pixels	8000x6000 pixels
Video recording (primary)	4K UHD (3840x2160) 30 fps	4K UHD (3840x2160) 30 fps
Flash	LED flash	LED flash
Focal aperture	f/1.8 (aperture)	f/2.0 (aperture)
Focal length	26mm lens	26mm lens
Sensor size	1/2" inches	1/2" inches
Pixel size	0.8µm pixel	0.8µm pixel
Autofocus	PDAF: phase detection autofocus	PDAF: phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	EIS: Digital stabilization	EIS: Digital stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Not supported	Not supported
HDR	HDR photo on both cameras	HDR photo on both cameras
Camera extras	feature not registered	feature not registered
📸 Front camera
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Front camera (secondary)	13 megapixels	32 megapixels
Front camera resolution	4128x3096 pixels	6528x4896 pixels
Video recording (secondary)	Full HD (1920x1080)	4K UHD (3840x2160)
Front flash	Not supported	Not supported
Focal aperture	f/2.0 (aperture)	f/2.2 (aperture)
Focal length	feature not registered	26mm lens
Sensor size	feature not registered	1/2.8" inches
Pixel size	1.12µm pixel	0.8µm pixel
🔉 Sound and multimedia
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Loudspeaker	Supported	Supported
Active noise cancellation	2 microphones or more	2 microphones or more
Radio	FM	FM (RDS)
TV	Not supported	Not supported
Video formats	MP4, H.265, H.264, H.263, XviD, MKV	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
USB	USB 2.0 Type-C, USB OTG On-The-Go	USB 2.0 Type-C, USB OTG On-The-Go
Audio output	3.5mm jack	3.5mm jack
TV output	Not supported	Not supported
Bluetooth	4.2 + A2DP	5.0 + A2DP/LE
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Not supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFC	Not supported	Not supported
Infrared port	Supported	Not supported
🧭 Sensors
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Sensors	Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor	Accelerometer Ambient light sensor ANT+ Compass Face unlock Fingerprint sensor (under display) Gyroscope Hall effect Virtual proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Battery type	LiPo: li-ion polymer (Non removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	4000 mAh	4000 mAh
Charger, watts	18W Wired fast charging	15W Wired fast charging
Inductive / wireless charging	feature not registered	Not supported
Talk time autonomy	feature not registered	feature not registered
Standby	feature not registered	feature not registered
➕ Other features
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	HTML, XHTML, HTML5	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Space Black, Moonlight White, Neptune Blue • MIUI 10	• Colors: Prism, Crush Black, White, Blue, Pink
☢️ Radiation rate
	Redmi Note 8 (32GB/3GB)	Galaxy A51 (SM-A515F/DSM 128GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	0.369W/kg (head), 1.59W/kg (body)