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Xiaomi Redmi K20 (256GB) vs Samsung Galaxy A21s (SM-A217M/DS)

Side by side comparison between Xiaomi Redmi K20 vs Samsung Galaxy A21s phones, differences, pros, cons and full specifications. What's the better?

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Compare Samsung Galaxy A21s X Xiaomi Redmi K20 (256GB) 22Points
6.39"
AMOLED

1080x2340

48
MP

20mp

8GB
RAM

Octa-core

4000
mAh

(Non removable)

vs
04Points Samsung Galaxy A21s (SM-A217M/DS) Compare Xiaomi Redmi K20 X
6.5"
PLS

720x1600

48
MP

13mp

4GB
RAM

Octa-core

5000
mAh

(Non removable)

What's the better phone? Xiaomi Redmi K20 (256GB)

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 K20 (256GB)} 22 Advantages Xiaomi Redmi K20 (256GB) vs Galaxy A21s (SM-A217M/DS)} 4 Advantages Samsung Galaxy A21s (SM-A217M/DS)
+2.2GHz 64bit Octa-core (8nm)14%
More powerful processor, you can open your applications faster
vs2GHz 64bit Octa-core (8nm)
+8GB LPDDR4X100%
More RAM memory. Typically more responsive and better for multitasking.
vs4GB LPDDR4X
+256GB (234GB available)4 times
More internal storage for applications and files
vs64GB (48GB available)
+UFS 2.1Advantage
Fastest write and read storage.
vseMMC 5.1
+191 grams (6.69 ounces)1%
Lighter
vs192 grams (6.72 ounces)
+8.8 millimeters (0.35 inches)1%
Thinner
vs8.9 millimeters (0.35 inches)
+Aluminum frame, glass front/backAdvantage
More resistant material
vsPlastic body, glass front
+AMOLEDAdvantage
AMOLED display is brighter and more vivid
vsTFT PLS
+HDR10Advantage
The HDR10 display provides vibrant colors and more details
vsNot supported
+1080x2340 pixels119%
Higher resolution screen
vs720x1600 pixels
+403 PPI49%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
vs270 PPI
+(triple camera) 48MP + 8MP + 13MP15%
Higher resolution main camera
vs(quad camera) 48MP + 8MP + 2MP + 2MP
+Dual-LED flashAdvantage
The Dual-LED flash helps in dark places or in low light
vsLED flash
+Digital and optical zoomAdvantage
The zoom allows for better focus and approach to take pictures
vsOnly digital zoom
+f/1.8 (aperture)11%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
vsf/2.0 (aperture)
+(front) 20MP56%
Higher resolution secondary camera to take pictures and selfies
vs(front) 13MP
+4K UHD (3840x2160)3 times
More image quality for recording videos with the primary camera
vsFull HD (1920x1080)
+(4G LTE-A) 800 Mbps167%
Faster for surfing the internet and download files
vs(4G LTE-A) 300 Mbps
+Ambient light sensorAdvantage
Sensors help you use the device
vsVirtual ambient light 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.
vs15W
+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
vsNot supported
+Gorilla Glass 5Advantage
Protection against scratches on the screen lets you carry your phone with your keys
vsNot supported
Not supportedvs+Until 512GB microSD, microSDXCAdvantage
More external storage for files using memory cards
6.39"vs+6.5"2%
Larger screen
Android 10vs+Android 12Advantage
Android 12 is newer and safer
4000 mAhvs+5000 mAh25%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use

29 Common items in both devices
60Hz
16 million
PDAF: phase detection autofocus
EIS: Digital stabilization
HDR photo on both cameras
1/2" inches
(front) Full HD (1920x1080)
+22 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 Clear highlight

📱 Model features

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
ModelRedmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
Other model namesXiaomi Redmi K20 M1903F10A, M1903F10C, M1903F10TGalaxy A21s SM-A217M/Dual-Sim (64GB + 4GB RAM)
Country or region availableChina
China
(Latin America)BrazilChileColombia
(Latin America), Brazil, Chile, Colombia
BrandXiaomiSamsung
Release date6/1/20196/2/2020, Announced: 5/15/2020
Depth8.8 millimeters (0.35 inches)8.9 millimeters (0.35 inches)
Size (width x height)74.3 x 156.7 millimeters (2.93 x 6.17 in)75.3 x 163.7 millimeters (2.96 x 6.44 in)
Weight191 grams (6.69 ounces)192 grams (6.72 ounces)
Build, materialsAluminum frame, glass front/backPlastic body, glass front
Protection against water and othersNot supportedNot supported

📲 Display

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
Display typeAMOLEDTFT PLS
Screen size6.39" inches6.5" inches
Screen-to-body ratio~86.1% (screen-to-body ratio)~82.8% (screen-to-body ratio)
Display resolution1080x2340 pixels (19.5:9)720x1600 pixels (20:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)403 PPI270 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass 5Not supported
Refresh rate60Hz60Hz
Display features600nits[typ]
HDR10
Not supported

🤖 Operating System

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
System versionAndroid 9.0 PieAndroid 10
Firmware updateAndroid 10Android 12
User Interfacefeature not registeredOne UI 2.0 / 3.1 / 4.1

⚙️ Processor

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
Chipset64bit: Qualcomm Snapdragon 730 (SM7150-AA) (8nm)64bit: Samsung Exynos 850 (8nm)
CPUOcta-core, 2 processors:
2x 2.2GHz Kryo 470 Gold (Dual-core)
6x 1.8GHz Kryo 470 Silver (Hexa-core)
Octa-core, 1 processor:
8x 2GHz ARM Cortex-A55 (Octa-core)
GPU graphical controllerQualcomm Adreno 618 (610MHz)ARM Mali-G52 MP1
Performance (benchmark)feature not registeredAnTuTu: 124232 (v8)

💽 Memory and storage

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
RAM memory8GB LPDDR4X4GB LPDDR4X
Internal storage256GB (234GB available)
UFS 2.1
64GB (48GB available)
eMMC 5.1
External storageNot supportedUntil 512GB microSD, microSDXC
(dedicated slot)

📶 Mobile networks

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
Dual-SIMDual-SIM Standby - Call active on one sim cardDual-SIM Standby - Call active on one sim card
(dedicated slot)
SIM card2 slots (Dual-SIM)
nano-SIM (4FF)
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum Download / Upload800/150 Mbps300/150 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bands Expand band details Collapse details
GSM MHz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkCDMA 800 (China), GSM 850/900/1800/1900GSM 850/900/1800/1900
Primary 3G networkMZB7754IN, MZB7755IN, MZB7756IN version:
UMTS 850/900/1900/2100
M1903F10A, M1903F10C, M1903F10T version:
CDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 850/900/1900/2100
UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat15/13
VoLTE
MZB7754IN, MZB7755IN, MZB7756IN version:
LTE (Bands 1, 3, 5, 7, 8)
TD-LTE (Bands 38, 40, 41)
M1903F10A, M1903F10C, M1903F10T version:
LTE (Bands 1, 3, 5, 7, 8)
TD-LTE (Bands 34, 38, 39, 40, 41)
LTE Cat7/13 (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 66)
TD-LTE (38, 40, 41)
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-AGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Secondary 3G networkNot supportedUMTS 850/900/1700/1900/2100
Secondary 4G networkNot supportedLTE Cat7/13 (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 66)
TD-LTE (38, 40, 41)
Secondary data networkGPRS, EDGEGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A

📷 Camera

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
Back camera (main camera)(triple camera)
48 megapixels
8MP telephoto f/2.453mm1/4"1.12µmPDAF2x-optical-zoom
13MP ultrawide f/2.412mm1/3"1.12µm
(quad camera)
48 megapixels
8MP ultrawide f/2.21/4"1.12µm123°
2MP macro f/2.4
2MP depth f/2.4
Main camera resolution8000x6000 pixels8000x6000 pixels
Video recording (primary)4K UHD (3840x2160) 30 fpsFull HD (1920x1080) 30 fps
FlashDual-LED flashLED flash
Focal aperturef/1.8 (aperture)f/2.0 (aperture)
Focal length26mm (lens)26mm (lens)
Sensor size1/2" inches1/2" inches
Pixel size0.8µm pixel0.8µm pixel
AutofocusPDAF: phase detection autofocusPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationEIS: Digital stabilizationEIS: Digital stabilization
ZoomDigital and optical zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedNot supported
HDRHDR photo on both camerasHDR photo on both cameras
Camera extrasfeature not registeredfeature not registered

📸 Front camera

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
Front camera (secondary)20 megapixels

*Motorized pop-up camera (slider)
13 megapixels
Front camera resolution5184x3840 pixels4128x3096 pixels
Video recording (secondary)Full HD (1920x1080)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/2.2 (aperture)f/2.2 (aperture)
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registered1/3.1" inches
Pixel size0.8µm pixel1.12µm pixel

🔉 Sound and multimedia

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
LoudspeakerSupportedMono sound (not stereo)
Active noise cancellation2 microphones or more2 microphones or more
RadioFMFM
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviDMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC

🔌 Connectivity

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
USBUSB 2.0 Type-C, USB OTG On-The-GoUSB 2.0 Type-C reversible connector
Audio output3.5mm jack3.5mm jack
TV outputNot supportedNot supported
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 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
DLNANot supportedNot supported
GPSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDouA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFCSupportedNot supported
Infrared portNot supportedNot supported

🧭 Sensors

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
SensorsAccelerometer
Ambient light sensor
Compass
Face unlock
Fingerprint sensor (under display)
Gyroscope
Proximity sensor
Accelerometer
Compass
Face unlock
Fingerprint sensor (rear-mounted)
Gyroscope
Proximity sensor
Virtual ambient light sensor
Vibrating alertSupportedSupported

🔋 Battery

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
Battery typeLiPo: li-ion polymer (Non removable)LiPo: li-ion polymer (Non removable)
Battery capacity4000 mAh5000 mAh
Charger, watts18W (9V/2A) Wired fast charging15W (9V/1.67A) Wired fast charging
Inductive / wireless chargingfeature not registeredNot supported
Talk time autonomyfeature not registeredfeature not registered
Standbyfeature not registeredfeature not registered

➕ Other features

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder, Voice commands
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardNot supportedNot supported
Miscellaneous• Colors: Carbon black, Flame red, Glacier blue
• MIUI 10
• HDR display
• 24-bit/192kHz audio
• Quick Charge 4+
• Colors: Black, White, Blue, Red

☢️ Radiation rate

Redmi K20 (256GB)Galaxy A21s (SM-A217M/DS)
SAR 1.6W/kg (USA, Mexico, etc.)1.07W/kg (head), 0.72W/kg (body)0.54W/kg (head), 1.14W/kg (body)
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
X

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