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

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

11/25/2020 11:20 AM, updated: 1/18/2023 4:22 AM

Compare Samsung Galaxy M21s X Samsung Galaxy Attain 4G (SCH-R920) 03Points

Specifications Compare Models Pictures

3.5"
TFT

320x480

3.1
MP

1.3mp

512MB
RAM

Single-core

1650
mAh

(Removable)

26Points Samsung Galaxy M21s (SM-F415F/DS) Compare Samsung Galaxy Attain 4G X

Specifications Compare Models Pictures

6.4"
AMOLED

1080x2340

64
MP

32mp

4GB
RAM

Octa-core

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!

3 Advantages Samsung Galaxy Attain 4G (SCH-R920)	vs	26 Advantages Samsung Galaxy M21s (SM-F415F/DS)
+119 grams (4.17 ounces)61% Lighter	vs	191 grams (6.69 ounces)
+Proximity sensorAdvantage Sensors help you use the device	vs	Virtual proximity sensor
+Li-Ion: lithium-ion (Removable)Advantage Removable battery can be replaced easily	vs	LiPo: li-ion polymer (Non removable)
1GHz 32bit Single-core	vs	+2.3GHz 64bit Octa-core (10nm)3 times More powerful processor, you can open your applications faster
512MB LPDDR2	vs	+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, microSDHC	vs	+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 LCD	vs	+Super AMOLEDAdvantage Super AMOLED display is brighter and more vivid
260 thousand	vs	+16 million61 times More colors on the screen is better quality images and videos
320x480 pixels	vs	+1080x2340 pixels15 times Higher resolution screen
165 PPI	vs	+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) 3.1MP	vs	+(triple camera) 64MP + 8MP + 5MP23 times Higher resolution main camera
(front) 1.3MP	vs	+(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 Gingerbread	vs	+Android 12Advantage Android 12 is newer and safer
(4G LTE) 100 Mbps	vs	+(4G LTE-A) 300 Mbps2 times Faster for surfing the internet and download files
Not supported	vs	+Face unlockAdvantage Sensors help you use the device
Not supported	vs	+Fingerprint sensor (rear-mounted)Advantage Sensors help you use the device
Not supported	vs	+GyroscopeAdvantage Sensors help you use the device
1650 mAh	vs	+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 You can have more mobile carriers/operators on the same device.
Not supported	vs	+FM (RDS)Advantage The radio lets you listen to your songs and sports in general
802.11 b/g/n [wifi4]	vs	+802.11 a/b/g/n/ac [wifi5]Advantage WiFi 802.11 a/b/g/n/ac [wifi5] is newer and faster
3.0 + A2DP	vs	+5.0 + A2DP/LEAdvantage Bluetooth 5.0 + A2DP/LE is newer and faster
MicroUSB 2.0	vs	+Type-CAdvantage Reversible connector, you can stick in a USB-C cable any which way; either side is up.
HTML, XHTML, Flash player	vs	+HTML, XHTML, HTML5Advantage Better sites viewing on the internet
Not supported	vs	+Gorilla Glass 3Advantage Protection against scratches on the screen lets you carry your phone with your keys

12 Common items in both devices

LED flash

Only digital zoom

Autofocus / PDAF: phase detection autofocus

4G LTE / 4G LTE-A

Capacitive

Multitouch

Accelerometer

+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 differences

📱 Model features
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Change model
Model	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Other model names	MetroPCS Samsung Galaxy Attain 4G R920, Samsung SCH-R920	Galaxy M21s SM-F415F/Dual-Sim (4GB RAM)
Country or region available	USA	(Latin America), Brazil
Brand	Samsung	Samsung
Release date	2/6/2012	11/6/2020
Depth	11.7 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)
Weight	119 grams (4.17 ounces)	191 grams (6.69 ounces)
Build, materials	feature not registered	Plastic body, glass front
Protection against water and others	Not supported	Not supported
📲 Display
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Display type	TFT LCD	Super AMOLED
Screen size	3.5" inches	6.4" inches
Screen-to-body ratio	~52% (screen-to-body ratio)	~84.1% (screen-to-body ratio)
Display resolution	320x480 pixels	1080x2340 pixels (19.5:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	165 PPI	403 PPI
Colors	260 thousand	16 million
Scratch-resistant glass	Not supported	Gorilla Glass 3
Refresh rate	feature not registered	60Hz
Display features	feature not registered	420nits[peak]
🤖 Operating System
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
System version	Android 2.3.6 Gingerbread	Android 10
Firmware update	feature not registered	Android 12
User Interface	feature not registered	One UI 2.5 / 3.1 / 4.1
⚙️ Processor
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Chipset	32bit: Qualcomm Snapdragon MSM8655T	64bit: Samsung Exynos 9611 (10nm)
CPU	Single-core, 1 processor: 1x 1GHz Scorpion (Single-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 205	ARM Mali-G72 MP3 (850MHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
RAM memory	512MB LPDDR2	4GB LPDDR4X
Internal storage	2GB (1.39GB available)	64GB (49GB available) UFS 2.1
External storage	Until 32GB microSD, microSDHC (dedicated slot)	Until 512GB microSD, microSDXC (dedicated slot)
📶 Mobile networks
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Dual-SIM	Not supported	Dual-SIM Standby - Call active on one sim card (dedicated slot)
SIM card	1 slot (Single-SIM) Standard mini-SIM (2FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	100/50 Mbps	300/50 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Not supported	Quad-Band 850/900/1800/1900
Primary 2G network	CDMA 800/1700/1900	GSM 850/900/1800/1900
Primary 3G network	CDMA2000 1xEV-DO	UMTS 850/900/1700/1900/2100
Primary 4G network	LTE 1700/2100	LTE Cat6 (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	CDMA2000 EV-DO Rev A, LTE	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G network	Not supported	GSM 850/900/1800/1900
Secondary 3G network	Not supported	UMTS 850/900/1700/1900/2100
Secondary 4G network	Not supported	LTE Cat6 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66) TD-LTE (38, 40, 41) VoLTE
Secondary data network	Not supported	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
📷 Camera
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Back camera (main camera)	3.1 megapixels	(triple camera) 64 megapixels 8MP ultrawide f/2.2123°12mm1/4"1.12µm 5MP depth f/2.2
Main camera resolution	2048x1536 pixels	10120x6328 pixels
Video recording (primary)	VGA (720x480)	4K UHD (3840x2160) 30 fps
Flash	LED flash	LED flash
Focal aperture	feature not registered	f/1.8 (aperture)
Focal length	feature not registered	26mm lens
Sensor size	feature not registered	1/1.72" inches
Pixel size	feature not registered	0.8µm pixel
Autofocus	Autofocus	PDAF: phase detection autofocus
Touch focus	feature not registered	Supported
Image stabilization	feature not registered	EIS: Digital stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	feature not registered	Face detection, Smile detection
BSI sensor	feature not registered	Supported
HDR	feature not registered	HDR photo on both cameras
Camera extras	feature not registered	4K@30fps 1080p@30fps
📸 Front camera
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Front camera (secondary)	1.3 megapixels	32 megapixels
Front camera resolution	1280x1024 pixels	6528x4896 pixels
Video recording (secondary)	Not supported	Full HD (1920x1080)
Front flash	Not supported	Not supported
Focal aperture	feature not registered	f/2.0 (aperture)
Focal length	feature not registered	26mm lens
Sensor size	feature not registered	1/2.8" inches
Pixel size	feature not registered	0.8µm pixel
🔉 Sound and multimedia
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Loudspeaker	Supported	Mono sound (not stereo)
Active noise cancellation	feature not registered	2 microphones or more
Radio	Not supported	FM (RDS)
TV	Not supported	Not supported
Video formats	MP4, H.264, H.263, WMV	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
USB	MicroUSB 2.0	USB 2.0 Type-C reversible connector
Audio output	3.5mm jack	3.5mm jack
TV output	Not supported	Not supported
Bluetooth	3.0 + A2DP	5.0 + A2DP/LE
WiFi	802.11 b/g/n [wifi4] (2.4GHz)	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	feature not registered	Not supported
GPS	A-GPS, GeoTagging	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFC	Not supported	Not supported
Infrared port	feature not registered	Not supported
🧭 Sensors
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Sensors	Accelerometer Ambient light sensor Compass Proximity sensor	Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (rear-mounted) Gyroscope Virtual proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Battery type	Li-Ion: lithium-ion (Removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	1650 mAh	6000 mAh
Charger, watts	Wired charging	15W Wired fast charging
Inductive / wireless charging	feature not registered	Not supported
Talk time autonomy	3.5 hours	48 hours (2 days)
Standby	200 hours (8.3 days)	feature not registered
➕ Other features
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
Call control	Voice recorder	Voice dialing, Voice recorder, Voice commands
Messaging	SMS (Swype), 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, Flash player	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Black • 2GB microSD included • Samsung TouchWiz 4 UI • HAC M4/T4 • WiFi hotspot • Java framework	• Colors: Black, Blue
☢️ Radiation rate
	Galaxy Attain 4G (SCH-R920)	Galaxy M21s (SM-F415F/DS)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	0.383W/kg (head)
SAR 2W/kg (Europe, UK, etc.)	feature not registered	feature not registered