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Xiaomi Redmi Note 9 (128GB Global) vs Samsung Galaxy S21

Side by side comparison between Xiaomi Redmi Note 9 vs Samsung Galaxy S21 phones, differences, pros, cons with full specifications. What's the better?

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Compare Samsung Galaxy S21 XXiaomi Redmi Note 9 (128GB Global)05Points
Xiaomi Redmi Note 9 (128GB Global)
6.53"
IPS

1080x2340

48
MP

13mp

4GB
RAM

64bit Octa

5020
mAh

(Non removable)

vs
Samsung Galaxy S21
6.2"
AMOLED

1080x2400

12.2
MP

10mp

8GB
RAM

64bit Octa

4000
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21

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!

Redmi Note 9 (128GB Global)5 Advantages Xiaomi Redmi Note 9 (128GB Global)vsGalaxy S2129 Advantages Samsung Galaxy S21
+Until 512GB microSD, microSDXCAdvantage
More external storage for files using memory cards
vsNot supported
+6.53"5%
Larger screen
vs6.2"
+(front) 13MP27%
Higher resolution secondary camera to take pictures and selfies
vs(front) 10MP
+3.5mm jackAdvantage
Headsets with 3.5mm Jack size are more common and easy to find in stores
vsType-C reversible connector
+5020 mAh26%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
vs4000 mAh
2Ghz 64bit Octa-Corevs+2.9Ghz 64bit Octa-Core57%
More powerful processor, you can open your applications faster
4GB LPDDR4Xvs+8GB LPDDR5100%
More RAM memory. Typically more responsive and better for multitasking.
eMMC 5.1vs+UFS 3.0Advantage
Fastest write and read storage.
199 grams (6.97 ounces)vs+169 grams (5.92 ounces)18%
Lighter
8.9 millimeters (0.35 inches)vs+7.9 millimeters (0.31 inches)13%
Thinner
Plastic body, glass frontvs+Aluminum body, glass front, plastic backAdvantage
More resistant material
TFT IPS LCDvs+Dynamic AMOLEDAdvantage
Dynamic AMOLED display is brighter and more vivid
Not supportedvs+HDR10+Advantage
The HDR10+ display provides vibrant colors and more details
60Hzvs+120Hz100%
The display reproduces more frames per second because the frequency (Hertz) is higher, improves fluidity and tires your eyes less.
1080x2340 pixelsvs+1080x2400 pixels3%
Higher resolution screen
395 PPIvs+424 PPI7%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
(quad camera) 48MP + 8MP + 2MP + 2MPvs+(triple camera) 12.2MP + 64MP + 12MP47%
Higher resolution main camera
Only digital zoomvs+Digital and optical zoomAdvantage
The zoom allows for better focus and approach to take pictures
EIS: Digital stabilizationvs+OIS: Optical stabilizationAdvantage
Image stabilization prevents blurry photos and helps in recording motion video
Not supportedvs+BSI sensorAdvantage
The BSI sensor allows the entry of more light generating photos with more detail and brightness
1/2" inchesvs+1/1.76" inches14%
The larger sensor camera lets you take photos with better depth.
Full HD (1920x1080)vs+8K UHD (7680x4320)15 times
More image quality for recording videos with the primary camera
(front) Full HD (1920x1080)vs+(front) 4K UHD (3840x2160)3 times
More image quality for recording videos with the secondary camera
4G+ LTE-Avs+5G NRAdvantage
The 5G NR network is newer and faster
(4G+ LTE-A) 800 Mbpsvs+(5G NR) 5000 Mbps5 times
Faster for surfing the internet and download files
Not supportedvs+BarometerAdvantage
Sensors help you use the device
Not supportedvs+ANT+Advantage
Sensors help you use the device
18Wvs+25W39%
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.
Not supportedvs+Qi wireless charging (Qi/PMA)Advantage
Wireless charging is another way to charge the battery.
2 slots (Dual-SIM)
(dedicated slot)
vs+2 slots (Dual-SIM) + e-SIM (Eletronic)Advantage
More SIM card slots. You can choose more carriers.
802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMOvs+802.11 a/b/g/n/ac/ax wifi6 (2.4Ghz, 5Ghz) + MIMOAdvantage
WiFi 802.11 a/b/g/n/ac/ax wifi6 (2.4Ghz, 5Ghz) + MIMO is newer and faster
Not supportedvs+DLNAAdvantage
With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.
USB 2.0 Type-C, USB OTG On-The-Govs+USB 3.2 Type-C, USB OTG On-The-GoAdvantage
Newer and faster USB version for transferring photos, mp3 or data.
Water repellent nano-coating (don't immerse)vs+IP68 certifiedAdvantage
Protection against water allows you talk to your friends in the rain, for example

27 Common items in both devices
128GB (106GB available) / 128GB (104GB available)
16 million
LED flash
PDAF: phase detection autofocus / PDAF: phase detection autofocus on both cameras
HDR photo on both cameras / HDR photo/video on both cameras
f/1.8 (aperture)
Android 11
+20 specs and more in the table below

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

Highlight differencesClear highlight
Physical featuresXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
ModelRedmi Note 9 (128GB Global)Galaxy S21
Other model namesXiaomi Redmi Note 9 M2003J15SG Global version (NFC)Galaxy S21 5G SM-G991B/DS
Country or region available(Global, International)
(Global, International)
(Global, International)
(Global, International)
BrandXiaomiSamsung
Release dateApril, 2020January, 2021
Depth8.9 millimeters (0.35 inches)7.9 millimeters (0.31 inches)
Size (width x height)77.2 x 162.3 millimeters (3.04 x 6.39 in)71.2 x 151.7 millimeters (2.8 x 5.97 in)
Weight199 grams (6.97 ounces)169 grams (5.92 ounces)
Qwerty physical keyboardNot supportedNot supported
AntennaInternal antennaInternal antenna
Build, materialsPlastic body, glass frontAluminum body, glass front, plastic back
Protection against water and othersWater repellent nano-coating (don't immerse)IP68 certified: dust proof and waterproof over 1.5 meter and 30min
System (OS)Xiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
Operating systemAndroid 10Android 11
Firmware updateAndroid 11feature not registered
HardwareXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
Chipset64bit - MediaTek Helio G85 (12nm)64bit - Samsung Exynos 2100 (5nm)
CPU processorOcta-Core, 2 processors:
2Ghz Dual-Core ARM-Cortex-A75
1.8Ghz Hexa-Core ARM-Cortex-A55
Octa-Core, 3 processors:
2.9Ghz Single-Core ARM Cortex-X1
2.8Ghz 3-Cores ARM Cortex-A78
2.2Ghz Quad-Core ARM Cortex-A55
GPU graphical controllerARM Mali-G52 MC2 1GhzARM Mali-G78 MP14
RAM memory4GB LPDDR4X8GB LPDDR5
Internal storage128GB (106GB available)
eMMC 5.1
128GB (104GB available)
UFS 3.0
External storageUntil 512GB microSD, microSDXC
(dedicated slot)
Not supported
DisplayXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
Display typeTFT IPS LCDDynamic AMOLED
Screen size6.53" inches6.2" inches
Screen-to-body ratio~83.5% (screen-to-body ratio)~85.9% (screen-to-body ratio)
Display resolution1080x2340 pixels (19.5:9)1080x2400 pixels (20:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch 10-points
Pixel density (dot pitch)395 PPI424 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass 5Gorilla Glass Victus
Display features60Hz, 450 nits120Hz, 1300 nits, HDR10+
Mobile networksXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
Dual-SIMDual-SIM Standby - Call active on one sim card
(dedicated slot)
Dual-SIM Standby - Call active on one sim card
SIM card2 slots (Dual-SIM)
nano-SIM (4FF)
2 slots (Dual-SIM)
nano-SIM (4FF) + e-SIM
Maximum download/upload800/150 Mbps5000/1920 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G, 5G
Frequency, bandsExpand band detailsCollapse details
GSM Mhz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800/1900CDMA 800/1900, GSM 850/900/1800/1900
Primary 3G networkUMTS 850/900/1700/1900/2100CDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat15/13 (Bands 1, 2, 3, 4, 5, 7, 8, 20, 28)
TD-LTE (Bands 38, 40, 41)
VoLTE
LTE Cat24 ()
TD-LTE ()
VoLTE
Primary 5G networkNot supportedSA/NSA/Sub6 ()
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-AGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, 5G SA/NSA, 5G NR
Secondary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkGPRS, EDGEGPRS, EDGE
CallingXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
SpeakerphoneSupportedSupported
Video callingSupportedSupported
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder, Voice commands
CameraXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
Back camera (main camera)(quad camera)
48 megapixels
8MP ultrawidef/2.213mm1/4"1.12µm118º
2MP macrof/2.41.75µmAF
2MP depthf/2.41/5"1.7µm
(triple camera)
12.2 megapixels
64MP telephotof/2.029mm1/1.72"0.8µmPDAFOIS1.1x-optical-zoom3x-hybrid-zoom
12MP ultrawidef/2.213mm120º1/2.55"1.4µmSuper-Steady-video
Main camera resolution8000x6000 pixels4032x3024 pixels
Video recording (primary)Full HD (1920x1080) 30 fps8K UHD (7680x4320) 24 fps
FlashLED flashLED flash
Focal aperturef/1.8 (aperture)f/1.8 (aperture)
Focal length26mm lens26mm lens
Sensor size1/2" inches1/1.76" inches
Pixel size0.8µm pixel1.8µm pixel
AutofocusPDAF: phase detection autofocusPDAF: phase detection autofocus on both cameras
Touch focusSupportedSupported
Image stabilizationEIS: Digital stabilizationOIS: Optical stabilization
ZoomOnly digital zoomDigital and optical zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedSupported
HDRHDR photo on both camerasHDR photo/video on both cameras
2ª cameraXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
Front camera (secondary)13 megapixels10 megapixels
Front camera resolution4128x3096 pixels3872x2592 pixels
Video recording (secondary)Full HD (1920x1080)4K UHD (3840x2160)
Front flashNot supportedNot supported
Focal aperturef/2.3 (aperture)f/2.2 (aperture)
Focal length29mm lens26mm lens
Sensor size1/3.06" inches1/3.24" inches
Pixel size1.12µm pixel1.22µm pixel
MultimediaXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
RadioFMFM
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviD, MKVMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC
ConnectivityXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
USBUSB 2.0 Type-C, USB OTG On-The-GoUSB 3.2 Type-C, USB OTG On-The-Go
TV outputNot supportedUSB Type-C (reversible)
Audio output3.5mm jackType-C reversible connector
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO802.11 a/b/g/n/ac/ax wifi6 (2.4Ghz, 5Ghz) + MIMO
DLNANot supportedSupported
NFCSupportedSupported
GPSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDouA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
Infrared portSupportedNot supported
Other functionsXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
Active noise cancellationSupportedSupported
Vibrating alertSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
SensorsAccelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Face unlock
Fingerprint sensor (rear-mounted)
Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Barometer
Gesture
Hall effect
Face unlock
Fingerprint sensor (under display)
ANT+
Other features- Colors: Forest Green, Midnight Grey, Polar White
- MIUI 11, 12
- 22.5W charger (18W phone support)
- WiFi direct, hotspot
- Colors: Phantom Gray, White, Violet, Pink
- One UI 3.1
- Always-on display
- Tuned by AKG
- 32-bit/384kHz audio
- Samsung Pay (Visa, MasterCard)
- Samsung DeX
- WiFi direct, hotspot
Power supplyXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
BatteryLiPo: Li-Ion polymer (Non removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity5020 mAh4000 mAh
Charger, watts18W Fast battery charging
9W Reverse charging USB between devices
25W Fast battery charging
15W Qi wireless charging (Qi/PMA)
4.5W Reverse wireless charging between devices
USB Power Delivery 3.0
Talk time autonomy1980 minutes | 33 hours | 1.4 daysfeature not registered
Standbyfeature not registeredfeature not registered
Radiation rateXiaomi Redmi Note 9 (128GB Global)Samsung Galaxy S21
SAR 1.6W/kg (USA, Mexico, etc.)0.84W/kg (head) | 0.9W/kg (body)feature not registered
SAR 2W/kg (Europe, UK, etc.)0.8W/kg (head) | 1.14W/kg (body)0.456W/kg (head) | 1.509W/kg (body)
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