Samsung Galaxy S21 FE (SM-G990E/DS 128GB/8GB) vs Xiaomi Mi Mix 3 (128GB/6GB)

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Side by side comparison between Samsung Galaxy S21 FE vs Xiaomi Mi Mix 3 phones, differences, pros, cons and full specifications. What's the better?

1/19/2022 6:21 PM, updated: 5/19/2025 11:24 AM

Compare Xiaomi Mi Mix 3 X Samsung Galaxy S21 FE (SM-G990E/DS 128GB/8GB) 26Points

Specifications Compare Models Pictures

6.4"
AMOLED

1080x2400

12.2
MP

32mp

8GB
RAM

Octa-core

4500
mAh

(Non removable)

03Points Xiaomi Mi Mix 3 (128GB/6GB) Compare Samsung Galaxy S21 FE X

Specifications Compare Models Pictures

6.39"
AMOLED

1080x2340

12
MP

24mp

6GB
RAM

Octa-core

3200
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21 FE (SM-G990E/DS 128GB/8GB)

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!

26 Advantages Samsung Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	vs	3 Advantages Xiaomi Mi Mix 3 (128GB/6GB)
+2.9GHz 64bit Octa-core (5nm)1% More powerful processor, you can open your applications faster	vs	2.8GHz 64bit Octa-core (10nm)
+8GB LPDDR533% More RAM memory. Typically more responsive and better for multitasking.	vs	6GB LPDDR4X
+UFS 3.1Advantage Fastest write and read storage.	vs	UFS 2.1
+177 grams (6.2 ounces)23% Lighter	vs	218 grams (7.63 ounces)
+7.9 millimeters (0.31 inches)8% Thinner	vs	8.5 millimeters (0.33 inches)
+HDR10+Advantage The HDR10+ display provides vibrant colors and more details	vs	HDR8
+120Hz100% The display reproduces more frames per second because the frequency (Hertz) is higher, improves fluidity and tires your eyes less.	vs	60Hz
+1080x2400 pixels3% Higher resolution screen	vs	1080x2340 pixels
+411 PPI2% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	403 PPI
+6.4"1% Larger screen	vs	6.39"
+(triple camera) 12.2MP + 12MP + 8MP34% Higher resolution main camera	vs	(dual camera) 12MP + 12MP
+1/1.76" inches45% The larger sensor camera lets you take photos with better depth.	vs	1/2.55" inches
+(front) 32MP23% Higher resolution secondary camera to take pictures and selfies	vs	(dual front camera) 24MP + 2MP
+(front) 4K UHD (3840x2160)3 times More image quality for recording videos with the secondary camera	vs	(front) Full HD (1920x1080)
+Android 15Advantage Android 15 is newer and safer	vs	Android 10
+5G SA/NSAAdvantage The 5G SA/NSA network is newer and faster	vs	4G LTE-A
+(5G SA/NSA) 2000 Mbps2 times Faster for surfing the internet and download files	vs	(4G LTE-A) 600 Mbps
+BarometerAdvantage Sensors help you use the device	vs	Not supported
+Proximity sensorAdvantage Sensors help you use the device	vs	Virtual proximity sensor
+4500 mAh41% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use	vs	3200 mAh
+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.	vs	18W
+Stereo soundAdvantage Better sound quality for listening to music or clearer hands-free calls	vs	Mono sound (not stereo)
+802.11 a/b/g/n/ac/ax [wifi6]Advantage WiFi 802.11 a/b/g/n/ac/ax [wifi6] is newer and faster	vs	802.11 a/b/g/n/ac [wifi5]
+DLNAAdvantage With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.	vs	Not supported
+USB 3.2 Type-C, USB OTG On-The-GoAdvantage Newer and faster USB version for transferring photos, mp3 or data.	vs	USB 2.0 Type-C, USB OTG On-The-Go
+IP68 certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example	vs	Not supported
128GB (97GB available)	vs	+128GB (110GB available)13% More internal storage for applications and files
Aluminum body, glass front, plastic back	vs	+Aluminum body, glass front, ceramic backAdvantage More resistant material
LED flash	vs	+LED flash on both camerasAdvantage The LED flash on both cameras helps in dark places or in low light

30 Common items in both devices

Dynamic AMOLED / Super AMOLED

16 million

Digital and optical zoom

PDAF: phase detection autofocus

OIS: Optical stabilization / OIS (4-axis): Optical stabilization

BSI sensor

HDR photo/video on both cameras / HDR photo on both cameras

+23 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 S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Change model		Choose the model
Model	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Other model names	Galaxy S21 FE 5G SM-G990B/Dual-SIM (Exynos)	小米MIX 3, Xiaomi Mix 3 M1810E5A
Country or region available	Philippines, India, Malaysia, Thailand	(Global, International), China
Brand	Samsung	Xiaomi
Release date	1/7/2022, Announced: 1/4/2022	11/1/2018, Announced: 10/1/2018
Depth	7.9 millimeters (0.31 inches)	8.5 millimeters (0.33 inches)
Size (width x height)	74.5 x 155.7 millimeters (2.93 x 6.13 in)	74.69 x 157.89 millimeters (2.94 x 6.22 in)
Weight	177 grams (6.2 ounces)	218 grams (7.63 ounces)
Build, materials	Aluminum body, glass front, plastic back	Aluminum body, glass front, ceramic back
Protection against water and others	IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant	Not supported
📲 Display
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Display type	Dynamic AMOLED	Super AMOLED
Screen size	6.4" inches	6.39" inches
Screen-to-body ratio	~85.3% (screen-to-body ratio)	~85% (screen-to-body ratio)
Display resolution	1080x2400 pixels (20:9)	1080x2340 pixels (19.5:9)
Touchscreen	Capacitive Multitouch 10-points	Capacitive Multitouch
Pixel density (dot pitch)	411 PPI	403 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass Victus	Gorilla Glass 3
Refresh rate	120Hz	60Hz
Display features	1300nits[peak] HDR10+ Always-On Display	600nits[typ] HDR8
🤖 Operating System
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
System version	Android 12	Android 9.0 Pie
Firmware update	Android 15	Android 10
User Interface	One UI 4.1 / 5.1 / 6.0 / 7.0	MIUI 10 / 12
⚙️ Processor
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Chipset	64bit: Samsung Exynos 2100 (5nm)	64bit: Qualcomm Snapdragon 845 (SDM845) (10nm)
CPU	Octa-core, 3 processors: 1x 2.9GHz ARM Cortex-X1 (Single-core) 3x 2.8GHz ARM Cortex-A78 (Triple-core) 4x 2.2GHz ARM Cortex-A55 (Quad-core)	Octa-core, 2 processors: 4x 2.8GHz Kryo 385 Gold (Quad-core) 4x 1.7GHz Kryo 385 Silver (Quad-core)
GPU graphical controller	ARM Mali-G78 MP14 (854MHz)	Qualcomm Adreno 630 (710MHz)
Performance (benchmark)	feature not registered	AnTuTu: 292353 (v7), 352130 (v8) Geekbench: 9065 (v4.4), 2170 (v5.1) GFXBench: 30fps (ES 3.1 onscreen)
💽 Memory and storage
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
RAM memory	8GB LPDDR5	6GB LPDDR4X
Internal storage	128GB (97GB available) UFS 3.1	128GB (110GB available) UFS 2.1
External storage	Not supported	Not supported
📶 Mobile networks
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Dual-SIM	Dual-SIM Standby - Call active on one sim card	Dual-SIM Standby - Call active on one sim card
SIM card	2 slots (Dual-SIM) nano-SIM (4FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	2000/1024 Mbps	600/50 Mbps
Network technology	2G, 3G, 4G, 5G	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	GSM 850/900/1800/1900	CDMA 800/1900, GSM 850/900/1800/1900
Primary 3G network	UMTS 850/900/1700/1900/2100	Global version: UMTS 800/850/900/1700/1800/1900/2100 China version: CDMA2000 1xEV-DO TD-SCDMA 1900/2000 UMTS 850/900/1700/1900/2100
Primary 4G network	LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE	LTE Cat11 VoLTE Global version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66) TD-LTE (34, 38, 39, 40, 41) China version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 20) TD-LTE (34, 38, 39, 40, 41)
Primary 5G network	SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 78, 79)	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA	GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	UMTS 850/900/1700/1900/2100	Global version: UMTS 800/850/900/1700/1800/1900/2100 China version: UMTS 850/900/1700/1900/2100
Secondary 4G network	LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE	LTE Cat11 VoLTE Global version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66) TD-LTE (34, 38, 39, 40, 41) China version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 20) TD-LTE (34, 38, 39, 40, 41)
Secondary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
📷 Camera
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Back camera (main camera)	(triple camera) 12.2 megapixels 12MP ultrawide f/2.2123°13mm1/3"1.12µm 8MP telephoto f/2.476mm1/4.5"1.0µmPDAFOIS3x-optical-zoom	(dual camera) 12 megapixels 12MP telephoto 1/3.4"1.0µm
Main camera resolution	4032x3024 pixels	4000x3000 pixels
Video recording (primary)	4K UHD (3840x2160) 60 fps	4K UHD (3840x2160) 60 fps
Flash	LED flash	LED flash on both cameras
Focal aperture	f/1.8 (aperture)	f/1.8 (aperture)
Focal length	26mm (lens)	feature not registered
Sensor size	1/1.76" inches	1/2.55" inches
Pixel size	1.8µm pixel	1.4µm pixel
Autofocus	PDAF: phase detection autofocus	PDAF: phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	OIS: Optical stabilization	OIS (4-axis): Optical stabilization
Zoom	Digital and optical zoom	Digital and optical zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Supported	Supported
HDR	HDR photo/video on both cameras	HDR photo on both cameras
Camera extras	4K@30/60fps 1080p@30/60fps 1080p@240fps (slow motion) 720p@960fps (slow motion)	4K@30/60fps 1080p@30/60/960fps
📸 Front camera
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Front camera (secondary)	32 megapixels	(dual front camera) 24 megapixels 2MP depth
Front camera resolution	6528x4896 pixels	5656x4224 pixels
Video recording (secondary)	4K UHD (3840x2160)	Full HD (1920x1080)
Front flash	Not supported	LED
Focal aperture	f/2.2 (aperture)	f/2.0 (aperture)
Focal length	26mm (lens)	26mm (lens)
Sensor size	1/2.74" inches	1/2.8" inches
Pixel size	0.8µm pixel	0.9µm pixel
🔉 Sound and multimedia
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Loudspeaker	Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG	Mono sound (not stereo)
Active noise cancellation	2 microphones	2 microphones or more
Radio	Not supported	Not supported
TV	Not supported	Not supported
Video formats	MP4, H.265, H.264, H.263, XviD, MKV	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
USB	USB 3.2 Type-C, USB OTG On-The-Go	USB 2.0 Type-C, USB OTG On-The-Go
Audio output	Type-C reversible connector	Type-C jack with 3.5mm jack adapter
TV output	USB Type-C SlimPort®	USB Type-C (reversible)
Bluetooth	5.0 + A2DP/LE	5.0 + A2DP/LE
WiFi	802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS
NFC	Supported	Supported
Infrared port	Not supported	Not supported
🧭 Sensors
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Sensors	Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (under display) Gyroscope Hall effect Proximity sensor	Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (rear-mounted) Gyroscope Virtual proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Battery type	LiPo: li-ion polymer (Non removable)	Li-Ion: lithium-ion (Non removable)
Battery capacity	4500 mAh	3200 mAh
Charger, watts	25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0	18W Wired fast charging Quick Charge 4
Inductive / wireless charging	15W Qi wireless charging 4.5W Reverse wireless charging	10W Qi wireless charging
Talk time autonomy	feature not registered	feature not registered
Standby	feature not registered	feature not registered
➕ Other features
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder
Messaging	SMS (T9), 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, HTML5	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Graphite, White, Lavender, Olive	• Colors: Onyx Black, Jade Green, Sapphire Blue • Mechanical pop-up front camera
☢️ Radiation rate
	Galaxy S21 FE (SM-G990E/DS 128GB/8GB)	Xiaomi Mi Mix 3 (128GB/6GB)
SAR 1.6W/kg (USA, Mexico, etc.)	0.65W/kg (head), 1.19W/kg (body)	1.45W/kg (head), 1.57W/kg (body)
SAR 2W/kg (Europe, UK, etc.)	0.93W/kg (head), 1.319W/kg (body)	feature not registered