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Samsung Galaxy Attain 4G (SCH-R920) vs Samsung Galaxy M21s (SM-F415F/DS)

Side by side comparison between Samsung Galaxy Attain 4G vs Samsung Galaxy M21s phones, differences, pros, cons with full specifications. What's the better?

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Compare Samsung Galaxy M21s XSamsung Galaxy Attain 4G (SCH-R920)03Points
Samsung Galaxy Attain 4G (SCH-R920)
3.5"
TFT

320x480

3.1
MP

1.3mp

512MB
RAM

32bit Single

1650
mAh

(Removable)

vs
26PointsSamsung Galaxy M21s (SM-F415F/DS)Compare Samsung Galaxy Attain 4G X
Samsung Galaxy M21s (SM-F415F/DS)
6.4"
AMOLED

1080x2340

64
MP

32mp

4GB
RAM

64bit Octa

6000
mAh

(Non removable)

What's the better phone? 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 Attain 4G (SCH-R920)3 Advantages Samsung Galaxy Attain 4G (SCH-R920)vsGalaxy M21s (SM-F415F/DS)26 Advantages Samsung Galaxy M21s (SM-F415F/DS)
+119 grams (4.17 ounces)61%
Lighter
vs191 grams (6.69 ounces)
+Proximity sensorAdvantage
Sensors help you use the device
vsNot supported
+Li-Ion: Lithium-Ion (Removable)Advantage
Removable battery can be replaced easily
vsLiPo: Li-Ion polymer (Non removable)
1Ghz 32bit Single-Corevs+2.3Ghz 64bit Octa-Core3 times
More powerful processor, you can open your applications faster
512MB LPDDR2vs+4GB LPDDR4X7 times
More RAM memory. Typically more responsive and better for multitasking.
2GB (1.39GB available)vs+64GB (49GB available)34 times
More internal storage for applications and files
Until 32GB microSD, microSDHCvs+Until 512GB microSD, microSDXC15 times
More external storage for files using memory cards
11.7 millimeters (0.46 inches)vs+8.9 millimeters (0.35 inches)31%
Thinner
TFT LCDvs+Super AMOLEDAdvantage
Super AMOLED display is brighter and more vivid
260 thousandvs+16 million61 times
More colors on the screen is better quality images and videos
320x480 pixelsvs+1080x2340 pixels15 times
Higher resolution screen
165 PPIvs+403 PPI144%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
3.5"vs+6.4"83%
Larger screen
(back) 3.1MPvs+(triple camera) 64MP + 8MP + 5MP23 times
Higher resolution main camera
(front) 1.3MPvs+(front) 32MP23 times
Higher resolution secondary camera to take pictures and selfies
VGA (720x480)vs+4K UHD (3840x2160)23 times
More image quality for recording videos with the primary camera
Android 2.3.6 Gingerbreadvs+Android 11Advantage
Android 11 is newer and safer
(4G LTE) 100 Mbpsvs+(4G+ LTE-A) 300 Mbps2 times
Faster for surfing the internet and download files
Not supportedvs+GyroscopeAdvantage
Sensors help you use the device
Not supportedvs+Fingerprint sensor (rear-mounted)Advantage
Sensors help you use the device
Not supportedvs+Face unlockAdvantage
Sensors help you use the device
1650 mAhvs+6000 mAh3 times
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
1 slot (Single-SIM)
(dedicated slot)
vs+2 slots (Dual-SIM)
(dedicated slot)Advantage
It's more advantageous to have more than one phone operator in the same device
Not supportedvs+FM (RDS)Advantage
The radio lets you listen to your songs and sports in general
802.11 b/g/n (2.4Ghz)vs+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
3.0 + A2DPvs+5.0 + A2DP/LEAdvantage
Bluetooth 5.0 + A2DP/LE is newer and faster
MicroUSB 2.0vs+Type-CAdvantage
Reversible connector, you can stick in a USB-C cable any which way; either side is up.
HTML, XHTML, Flash playervs+HTML, XHTML, HTML5Advantage
Better sites viewing on the internet
Not supportedvs+Gorilla Glass 3Advantage
Protection against scratches on the screen lets you carry your phone with your keys

15 Common items in both devices
LED flash
Only digital zoom
Autofocus / PDAF: phase detection autofocus
4G LTE / 4G+ LTE-A
Capacitive
Multitouch
3.5mm jack
+8 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 Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
ModelGalaxy Attain 4G (SCH-R920)Galaxy M21s (SM-F415F/DS)
Other model namesMetroPCS Samsung Galaxy Attain 4G R920, Samsung SCH-R920Galaxy M21s SM-F415F/Dual-Sim (4GB RAM)
Country or region availableUSA
USA
(Latin America)Brazil
(Latin America), Brazil
BrandSamsungSamsung
Release dateFebruary, 2012November, 2020
Depth11.7 millimeters (0.46 inches)8.9 millimeters (0.35 inches)
Size (width x height)60.5 x 116 millimeters (2.38 x 4.57 in)75.1 x 159.2 millimeters (2.96 x 6.27 in)
Weight119 grams (4.17 ounces)191 grams (6.69 ounces)
Qwerty physical keyboardNot supportedNot supported
AntennaInternal antennaInternal antenna
Build, materialsfeature not registeredPlastic body, glass front
Protection against water and othersNot supportedNot supported
System (OS)Samsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
Operating systemAndroid 2.3.6 GingerbreadAndroid 10
Firmware updatefeature not registeredAndroid 11
HardwareSamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
Chipset32bit - Qualcomm Snapdragon MSM8655T64bit - Samsung Exynos 9 Octa 9611 (10nm)
CPU processor1Ghz Single-Core ScorpionOcta-Core, 2 processors:
2.3Ghz Quad-Core ARM Cortex-A73
1.7Ghz Quad-Core ARM Cortex-A53
GPU graphical controllerQualcomm Adreno 205ARM Mali-G72 MP3
RAM memory512MB LPDDR24GB LPDDR4X
Internal storage2GB (1.39GB available)64GB (49GB available)
UFS 2.1
External storageUntil 32GB microSD, microSDHC
(dedicated slot)
Until 512GB microSD, microSDXC
(dedicated slot)
DisplaySamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
Display typeTFT LCDSuper AMOLED
Screen size3.5" inches6.4" inches
Screen-to-body ratio~52% (screen-to-body ratio)~84.1% (screen-to-body ratio)
Display resolution320x480 pixels1080x2340 pixels (19.5:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)165 PPI403 PPI
Colors260 thousand16 million
Scratch-resistant glassNot supportedGorilla Glass 3
Display featuresfeature not registered60Hz, 420 nits
Mobile networksSamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
Dual-SIMNot supportedDual-SIM Standby - Call active on one sim card
(dedicated slot)
SIM card1 slot (Single-SIM)
Standard mini-SIM (2FF)
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum download/upload100/50 Mbps300/50 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bandsExpand band detailsCollapse details
GSM Mhz bandNot supportedQuad-Band 850/900/1800/1900
Primary 2G networkCDMA 800/1700/1900GSM 850/900/1800/1900
Primary 3G networkCDMA2000 1xEV-DOUMTS 850/900/1700/1900/2100
Primary 4G networkLTE 1700/2100LTE Cat6 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66)
TD-LTE (38, 40, 41)
VoLTE
Primary 5G networkNot supportedNot supported
Primary data networkCDMA2000 EV-DO Rev A, LTEGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G networkNot supportedGSM 850/900/1800/1900
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedGPRS, EDGE
CallingSamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
MessagingSMS (Swype), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
SpeakerphoneSupportedSupported
Video callingSupportedSupported
Call controlVoice recorderVoice dialing, Voice recorder, Voice commands
CameraSamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
Back camera (main camera)3.1 megapixels(triple camera)
64 megapixels
8MP ultrawidef/2.2123º12mm1/4"1.12µm
5MP depthf/2.2
Main camera resolution2048x1536 pixels10120x6328 pixels
Video recording (primary)VGA (720x480)4K UHD (3840x2160) 30 fps
FlashLED flashLED flash
Focal aperturefeature not registeredf/1.8 (aperture)
Focal lengthfeature not registered26mm lens
Sensor sizefeature not registered1/1.72" inches
Pixel sizefeature not registered0.8µm pixel
AutofocusAutofocusPDAF: phase detection autofocus
Touch focusfeature not registeredSupported
Image stabilizationfeature not registeredEIS: Digital stabilization
ZoomOnly digital zoomOnly digital zoom
Face/smile detectionfeature not registeredFace detection, Smile detection
BSI sensorfeature not registeredNot supported
HDRfeature not registeredHDR photo on both cameras
2ª cameraSamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
Front camera (secondary)1.3 megapixels32 megapixels
Front camera resolution1280x1024 pixels6528x4896 pixels
Video recording (secondary)Not supportedFull HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturefeature not registeredf/2.0 (aperture)
Focal lengthfeature not registered26mm lens
Sensor sizefeature not registered1/2.8" inches
Pixel sizefeature not registered0.8µm pixel
MultimediaSamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
RadioNot supportedFM (RDS)
TVNot supportedNot supported
Video formatsMP4, H.264, H.263, WMVMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, WMA, eAAC+MP3, WAV, WMA, eAAC+, FLAC
ConnectivitySamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
USBMicroUSB 2.0USB 2.0 Type-C reversible connector
TV outputNot supportedNot supported
Audio output3.5mm jack3.5mm jack
Bluetooth3.0 + A2DP5.0 + A2DP/LE
WiFi802.11 b/g/n (2.4Ghz)802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO
DLNAfeature not registeredNot supported
NFCNot supportedNot supported
GPSA-GPS, GeoTaggingA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
Infrared portfeature not registeredNot supported
Other functionsSamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
Active noise cancellationfeature not registeredSupported
Vibrating alertSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, Flash playerHTML, XHTML, HTML5
SensorsAccelerometer
Proximity sensor
Compass
Ambient Light sensor
Accelerometer
Compass
Ambient Light sensor
Gyroscope
Face unlock
Fingerprint sensor (rear-mounted)
Other features- Colors: Black
- 2GB microSD included
- Samsung TouchWiz 4 UI
- HAC M4/T4
- WiFi hotspot
- Java framework
- Colors: Black, Blue
- One UI 2.5, 3.1
- Stereo sound not supported
- DeX not supported
- WiFi direct, hotspot
Power supplySamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
BatteryLi-Ion: Lithium-Ion (Removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity1650 mAh6000 mAh
Charger, watts Standard charging15W Fast battery charging
Talk time autonomy210 minutes | 3.5 hours | 0.1 day2880 minutes | 48 hours | 2 days
Standby12000 minutes | 200 hours | 8.3 daysfeature not registered
Radiation rateSamsung Galaxy Attain 4G (SCH-R920)Samsung Galaxy M21s (SM-F415F/DS)
SAR 1.6W/kg (USA, Mexico, etc.)feature not registered0.383W/kg (head)
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
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