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Samsung Galaxy M21s (SM-F415F/DS) vs Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)

Side by side comparison between Samsung Galaxy M21s vs Samsung Galaxy Watch Active 2 devices, differences, pros, cons with full specifications. What's the better?

Compare Samsung Galaxy Watch Active 2 XSamsung Galaxy M21s (SM-F415F/DS)28Points
Samsung Galaxy M21s (SM-F415F/DS)





64bit Octa


(Non removable)

08PointsSamsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Compare Samsung Galaxy M21s X
Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)




64bit Dual


(Non removable)

What's the better device? Samsung Galaxy M21s (SM-F415F/DS)

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!

Galaxy M21s (SM-F415F/DS)28 Advantages Samsung Galaxy M21s (SM-F415F/DS)vsGalaxy Watch Active 2 (Aluminum 44mm SM-R820)8 Advantages Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
+2.3Ghz 64bit Octa-Core143%
More powerful processor, you can open your applications faster
vs1.15Ghz 64bit Dual-Core
+4GB LPDDR4X4 times
More RAM memory. Typically more responsive and better for multitasking.
vs768MB LPDDR3
+64GB (49GB available)34 times
More internal storage for applications and files
vs4GB (1.39GB available)
+UFS 2.1Advantage
Fastest write and read storage.
+Until 512GB microSD, microSDXCAdvantage
More external storage for files using memory cards
vsNot supported
+8.9 millimeters (0.35 inches)22%
vs10.9 millimeters (0.43 inches)
+1080x2340 pixels19 times
Higher resolution screen
vs360x360 pixels
+403 PPI11%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
vs364 PPI
+6.4"4 times
Larger screen
+(triple camera) 64MP + 8MP + 5MPAdvantage
With a camera you can take pictures anywhere
vsNot supported
+4K UHD (3840x2160)Advantage
More image quality for recording videos with the primary camera
vsNot supported
+3500000 apps (Google Play Store)2332 times
More apps available to download and use
vs1500 apps
+4G+ LTE-AAdvantage
The 4G+ LTE-A network is newer and faster
vsNot supported
+(4G+ LTE-A) 300 MbpsAdvantage
Faster for surfing the internet and download files
vs(Not supported)
+3.5mm jackAdvantage
Headsets with 3.5mm Jack size are more common and easy to find in stores
vsNot supported
Sensors help you use the device
vsNot supported
Sensors help you use the device
vsNot supported
+Fingerprint sensor (rear-mounted)Advantage
Sensors help you use the device
vsNot supported
+Face unlockAdvantage
Sensors help you use the device
vsNot supported
+6000 mAh17 times
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
vs340 mAh
+Video callingAdvantage
The video calling allows to make calls with voice and video
vsNot supported
+2 slots (Dual-SIM)
(dedicated slot)Advantage
It's more advantageous to have more than one phone operator in the same device
vsNot supported
+Active noise cancellationAdvantage
Noise-canceling microphone allows better call quality
vsNot supported
+FM (RDS)Advantage
The radio lets you listen to your songs and sports in general
vsNot supported
+802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMOAdvantage
WiFi 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO is newer and faster
vs802.11 b/g/n (2.4Ghz)
+USB 2.0 Type-C reversible connectorAdvantage
Newer and faster USB version for transferring photos, mp3 or data.
vsNot supported
Reversible connector, you can stick in a USB-C cable any which way; either side is up.
vsNot supported
+HTML, XHTML, HTML5Advantage
Better sites viewing on the internet
vsNot supported
191 grams (6.69 ounces)vs+30 grams (1.05 ounces)5 times
Plastic body, glass frontvs+Aluminum body, glass frontAdvantage
More resistant material
Not supportedvs+BarometerAdvantage
Sensors help you use the device
Not supportedvs+Heart rateAdvantage
Sensors help you use the device
Not supportedvs+PedometerAdvantage
Sensors help you use the device
Not supportedvs+Qi wireless chargingAdvantage
Wireless charging is another way to charge the battery.
Not supportedvs+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
Not supportedvs+50 meters waterproof., MIL-STD-810G military certifiedAdvantage
Protection against water allows you talk to your friends in the rain, for example

12 Common items in both devices
16 million
Ambient Light sensor
LiPo: Li-Ion polymer (Non removable) / Li-Ion: Lithium-Ion (Non removable)
+5 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 featuresSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
ModelGalaxy M21s (SM-F415F/DS)Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
Other model namesGalaxy M21s SM-F415F/Dual-Sim (4GB RAM)Galaxy Watch Active2 SM-R820 (Bluetooth+WiFi Aluminium)
Country or region available(Latin America)Brazil
(Latin America), Brazil
(Global, International)
(Global, International)
Release dateNovember, 2020September, 2019
Depth8.9 millimeters (0.35 inches)10.9 millimeters (0.43 inches)
Size (width x height)75.1 x 159.2 millimeters (2.96 x 6.27 in)44 x 44 millimeters (1.73 x 1.73 in)
Weight191 grams (6.69 ounces)30 grams (1.05 ounces)
Qwerty physical keyboardNot supportedNot supported
AntennaInternal antennaInternal antenna
Build, materialsPlastic body, glass frontAluminum body, glass front
Protection against water and othersNot supported50 meters waterproof.
MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
System (OS)Samsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
Operating systemAndroid 10Tizen 4.0
Firmware updateAndroid 11feature not registered
HardwareSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
Chipset64bit - Samsung Exynos 9 Octa 9611 (10nm)64bit - Samsung Exynos 9 Dual 9110 (10nm)
CPU processorOcta-Core, 2 processors:
2.3Ghz Quad-Core ARM Cortex-A73
1.7Ghz Quad-Core ARM Cortex-A53
1.15Ghz Dual-Core ARM Cortex-A53
GPU graphical controllerARM Mali-G72 MP3ARM Mali-T720 MP1
Internal storage64GB (49GB available)
UFS 2.1
4GB (1.39GB available)
External storageUntil 512GB microSD, microSDXC
(dedicated slot)
Not supported
DisplaySamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
Display typeSuper AMOLEDSuper AMOLED
Screen size6.4" inches1.4" inches
Screen-to-body ratio~84.1% (screen-to-body ratio)~32.7% (screen-to-body ratio)
Display resolution1080x2340 pixels (19.5:9)360x360 pixels (1:1)
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)403 PPI364 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass 3Gorilla Glass DX+
Display features60Hz, 420 nitsNot supported
Mobile networksSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
Dual-SIMDual-SIM Standby - Call active on one sim card
(dedicated slot)
Not supported
SIM card2 slots (Dual-SIM)
nano-SIM (4FF)
Not supported
Maximum download/upload300/50 Mbpsfeature not registered
Network technology2G, 3G, 4Gfeature not registered
Frequency, bandsExpand band detailsCollapse details
GSM Mhz bandQuad-Band 850/900/1800/1900Not supported
Primary 2G networkGSM 850/900/1800/1900Not supported
Primary 3G networkUMTS 850/900/1700/1900/2100Not supported
Primary 4G networkLTE Cat6 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66)
TD-LTE (38, 40, 41)
Not supported
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-ANot supported
Secondary 2G networkGSM 850/900/1800/1900Not supported
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkGPRS, EDGENot supported
CallingSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Video callingSupportedNot supported
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder, Voice commands
CameraSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
Back camera (main camera)(triple camera)
64 megapixels
8MP ultrawidef/2.2123º12mm1/4"1.12µm
5MP depthf/2.2
Not supported
Main camera resolution10120x6328 pixelsNot supported
Video recording (primary)4K UHD (3840x2160) 30 fpsNot supported
FlashLED flashNot supported
Focal aperturef/1.8 (aperture)feature not registered
Focal length26mm lensfeature not registered
Sensor size1/1.72" inchesfeature not registered
Pixel size0.8µm pixelfeature not registered
AutofocusPDAF: phase detection autofocusNot supported
Touch focusSupportedNot supported
Image stabilizationEIS: Digital stabilizationNot supported
ZoomOnly digital zoomNot supported
Face/smile detectionFace detection, Smile detectionNot supported
BSI sensorNot supportedNot supported
HDRHDR photo on both camerasNot supported
2ª cameraSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
Front camera (secondary)32 megapixelsNot supported
Front camera resolution6528x4896 pixelsNot supported
Video recording (secondary)Full HD (1920x1080)Not supported
Front flashNot supportedNot supported
Focal aperturef/2.0 (aperture)feature not registered
Focal length26mm lensfeature not registered
Sensor size1/2.8" inchesfeature not registered
Pixel size0.8µm pixelfeature not registered
MultimediaSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
RadioFM (RDS)Not supported
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviD, MKVMP4
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, WMA, OGG, eAAC+
ConnectivitySamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
USBUSB 2.0 Type-C reversible connectorNot supported
TV outputNot supportedNot supported
Audio output3.5mm jackNot supported
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO802.11 b/g/n (2.4Ghz)
DLNANot supportedNot supported
NFCNot supportedSupported
Infrared portNot supportedNot supported
Other functionsSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
Active noise cancellationSupportedNot supported
Vibrating alertSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5Not supported
Ambient Light sensor
Face unlock
Fingerprint sensor (rear-mounted)
Ambient Light sensor
Heart rate
Other features- Colors: Black, Blue
- One UI 2.5, 3.1
- Stereo sound not supported
- DeX not supported
- WiFi direct, hotspot
- Colors: Black, Silver, Pink Gold
- Bands: 20mm
- Always-on display
- Samsung Pay
Power supplySamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
BatteryLiPo: Li-Ion polymer (Non removable)Li-Ion: Lithium-Ion (Non removable)
Battery capacity6000 mAh340 mAh
Charger, watts15W Fast battery charging Standard charging
Qi wireless charging
Talk time autonomy2880 minutes | 48 hours | 2 days3600 minutes | 60 hours | 2.5 days
Standbyfeature not registeredfeature not registered
Radiation rateSamsung Galaxy M21s (SM-F415F/DS)Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
SAR 1.6W/kg (USA, Mexico, etc.)0.383W/kg (head)0.17W/kg (head) | 0.16W/kg (body)
SAR 2W/kg (Europe, UK, etc.)feature not registered0.057W/kg (head) | 0.153W/kg (body)

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