Oppo Find X (128GB) vs Samsung Galaxy S21 FE (SM-G9900 128GB)

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Side by side comparison between Oppo Find X vs Samsung Galaxy S21 FE phones, differences, pros, cons and full specifications. What's the better?

1/19/2022 5:14 PM, updated: 6/9/2025 11:20 PM

Compare Samsung Galaxy S21 FE X Oppo Find X (128GB) 05Points

Specifications Compare Models Pictures

6.42"
AMOLED

1080x2340

16
MP

25mp

8GB
RAM

Octa-core

3730
mAh

(Non removable)

28Points Samsung Galaxy S21 FE (SM-G9900 128GB) Compare Oppo Find X X

Specifications Compare Models Pictures

6.4"
AMOLED

1080x2400

12.2
MP

32mp

8GB
RAM

Octa-core

4500
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21 FE (SM-G9900 128GB)

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!

5 Advantages Oppo Find X (128GB)	vs	28 Advantages Samsung Galaxy S21 FE (SM-G9900 128GB)
+128GB (110GB available)13% More internal storage for applications and files	vs	128GB (97GB available)
+6.42"1% Larger screen	vs	6.4"
+(dual camera) 16MP + 20MP12% Higher resolution main camera	vs	(triple camera) 12.2MP + 12MP + 8MP
+Dual-LED flashAdvantage The Dual-LED flash helps in dark places or in low light	vs	LED flash
+Face unlock 3DAdvantage Sensors help you use the device	vs	Face unlock 2D
2.8GHz 64bit Octa-core (10nm)	vs	+2.9GHz 64bit Octa-core (5nm)1% More powerful processor, you can open your applications faster
8GB LPDDR4X	vs	+8GB LPDDR5Advantage This RAM type is better and more efficient.
UFS 2.1	vs	+UFS 3.1Advantage Fastest write and read storage.
186 grams (6.51 ounces)	vs	+177 grams (6.2 ounces)5% Lighter
9.4 millimeters (0.37 inches)	vs	+7.9 millimeters (0.31 inches)19% Thinner
AMOLED	vs	+Dynamic AMOLEDAdvantage Dynamic AMOLED display is brighter and more vivid
Not supported	vs	+HDR10+Advantage The HDR10+ display provides vibrant colors and more details
60Hz	vs	+120Hz100% The display reproduces more frames per second because the frequency (Hertz) is higher, improves fluidity and tires your eyes less.
1080x2340 pixels	vs	+1080x2400 pixels3% Higher resolution screen
401 PPI	vs	+411 PPI2% Crisper display of text, images and videos because it has more pixels per inch (ppi)
Only digital zoom	vs	+Digital and optical zoomAdvantage The zoom allows for better focus and approach to take pictures
1/2.6" inches	vs	+1/1.76" inches48% The larger sensor camera lets you take photos with better depth.
f/2.0 (aperture)	vs	+f/1.8 (aperture)11% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 25MP	vs	+(front) 32MP28% Higher resolution secondary camera to take pictures and selfies
(front) Full HD (1920x1080)	vs	+(front) 4K UHD (3840x2160)3 times More image quality for recording videos with the secondary camera
Android 10	vs	+Android 15Advantage Android 15 is newer and safer
4G LTE-A	vs	+5G SA/NSAAdvantage The 5G SA/NSA network is newer and faster
(4G LTE-A) 1024 Mbps	vs	+(5G SA/NSA) 2000 Mbps95% Faster for surfing the internet and download files
Not supported	vs	+BarometerAdvantage Sensors help you use the device
Not supported	vs	+Fingerprint sensor (under display)Advantage Sensors help you use the device
3730 mAh	vs	+4500 mAh21% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
20W	vs	+25W25% 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.
Not supported	vs	+Qi wireless chargingAdvantage Wireless charging is another way to charge the battery.
Mono sound (not stereo)	vs	+Stereo soundAdvantage Better sound quality for listening to music or clearer hands-free calls
802.11 a/b/g/n/ac [wifi5]	vs	+802.11 a/b/g/n/ac/ax [wifi6]Advantage WiFi 802.11 a/b/g/n/ac/ax [wifi6] is newer and faster
Not supported	vs	+DLNAAdvantage With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.
USB 2.0 Type-C, USB OTG On-The-Go	vs	+USB 3.2 Type-C, USB OTG On-The-GoAdvantage Newer and faster USB version for transferring photos, mp3 or data.
Not supported	vs	+IP68 certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example

26 Common items in both devices

Aluminum frame, glass front/back / Aluminum body, glass front, plastic back

16 million

PDAF: phase detection autofocus

OIS: Optical stabilization

BSI sensor

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

4K UHD (3840x2160)

+19 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
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Change model		Choose the model
Model	Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Other model names	BBK Oppo Find X PAFM00, PAFT00	Galaxy S21 FE 5G SM-G9900 Dual-SIM (Exynos)
Country or region available	(Global, International), China, Hong Kong	China
Brand	Oppo	Samsung
Release date	7/1/2018	1/7/2022, Announced: 1/4/2022
Depth	9.4 millimeters (0.37 inches)	7.9 millimeters (0.31 inches)
Size (width x height)	74.2 x 156.7 millimeters (2.92 x 6.17 in)	74.5 x 155.7 millimeters (2.93 x 6.13 in)
Weight	186 grams (6.51 ounces)	177 grams (6.2 ounces)
Build, materials	Aluminum frame, glass front/back Back: Gorilla Glass 5	Aluminum body, glass front, plastic back
Protection against water and others	Not supported	IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant
📲 Display
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Display type	AMOLED	Dynamic AMOLED
Screen size	6.42" inches	6.4" inches
Screen-to-body ratio	~87% (screen-to-body ratio)	~85.3% (screen-to-body ratio)
Display resolution	1080x2340 pixels (19.5:9)	1080x2400 pixels (20:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch 10-points
Pixel density (dot pitch)	401 PPI	411 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 5	Gorilla Glass Victus
Refresh rate	60Hz	120Hz
Display features	Not supported	1300nits[peak] HDR10+ Always-On Display
🤖 Operating System
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
System version	Android 8.1 Oreo	Android 12
Firmware update	Android 10	Android 15
User Interface	ColorOS 5.1 / 7.0	One UI 4.1 / 5.1 / 6.0 / 7.0
⚙️ Processor
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Chipset	64bit: Qualcomm Snapdragon 845 (SDM845) (10nm)	64bit: Samsung Exynos 2100 (5nm)
CPU	Octa-core, 2 processors: 4x 2.8GHz Kryo 385 Gold (Quad-core) 4x 1.7GHz Kryo 385 Silver (Quad-core)	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)
GPU graphical controller	Qualcomm Adreno 630 (710MHz)	ARM Mali-G78 MP14 (854MHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
RAM memory	8GB LPDDR4X	8GB LPDDR5
Internal storage	128GB (110GB available) UFS 2.1	128GB (97GB available) UFS 3.1
External storage	Not supported	Not supported
📶 Mobile networks
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
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	1024/150 Mbps	2000/1024 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G, 5G
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	CDMA 800, GSM 850/900/1800/1900	CDMA 800, GSM 850/900/1800/1900
Primary 3G network	CDMA2000 1xEV-DO TD-SCDMA 1900/2000 UMTS 850/900/1700/1900/2100	CDMA2000 1xEV-DO UMTS 850/900/1900/2100
Primary 4G network	LTE Cat16 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 32, 66) TD-LTE (34, 38, 39, 40, 41)	LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE
Primary 5G network	Not supported	SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 78, 79)
Primary data network	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	GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	Not supported	UMTS 850/900/1900/2100
Secondary 4G network	Not supported	LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE
Secondary data network	GPRS, EDGE	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
📷 Camera
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Back camera (main camera)	(dual camera) 16 megapixels 20MP f/2.01/2.8"1.0µm	(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
Main camera resolution	4608x3456 pixels	4032x3024 pixels
Video recording (primary)	4K UHD (3840x2160) 30 fps	4K UHD (3840x2160) 60 fps
Flash	Dual-LED flash	LED flash
Focal aperture	f/2.0 (aperture)	f/1.8 (aperture)
Focal length	feature not registered	26mm (lens)
Sensor size	1/2.6" inches	1/1.76" inches
Pixel size	1.22µm pixel	1.8µm pixel
Autofocus	PDAF: phase detection autofocus	PDAF: phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	OIS: Optical stabilization	OIS: Optical stabilization
Zoom	Only digital zoom	Digital and optical zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Supported	Supported
HDR	HDR photo on both cameras	HDR photo/video on both cameras
Camera extras	feature not registered	4K@30/60fps 1080p@30/60fps 1080p@240fps (slow motion) 720p@960fps (slow motion)
📸 Front camera
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Front camera (secondary)	25 megapixels *Motorized pop-up camera (slider)	32 megapixels
Front camera resolution	5760x4320 pixels	6528x4896 pixels
Video recording (secondary)	Full HD (1920x1080)	4K UHD (3840x2160)
Front flash	Not supported	Not supported
Focal aperture	f/2.0 (aperture)	f/2.2 (aperture)
Focal length	feature not registered	26mm (lens)
Sensor size	feature not registered	1/2.74" inches
Pixel size	feature not registered	0.8µm pixel
🔉 Sound and multimedia
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Loudspeaker	Mono sound (not stereo)	Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG
Active noise cancellation	2 microphones	2 microphones
Radio	Not supported	Not supported
TV	Not supported	Not supported
Video formats	MP4, H.265, H.264, H.263, DivX, XviD	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, OGG, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
USB	USB 2.0 Type-C, USB OTG On-The-Go	USB 3.2 Type-C, USB OTG On-The-Go
Audio output	Type-C reversible connector	Type-C reversible connector
TV output	USB Type-C (reversible)	USB Type-C SlimPort®
Bluetooth	5.0 + A2DP/LE	5.0 + A2DP/LE
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Not supported	Supported
GPS	A-GPS, GeoTagging, GLONASS, BeiDou	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFC	Supported	Supported
Infrared port	Not supported	Not supported
🧭 Sensors
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Sensors	Accelerometer Ambient light sensor Compass Face unlock 3D Gyroscope Hall effect Proximity sensor	Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (under display) Gyroscope Hall effect Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Battery type	LiPo: li-ion polymer (Non removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	3730 mAh	4500 mAh
Charger, watts	20W Wired fast charging VOOC 3.0	25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0
Inductive / wireless charging	Not supported	15W Qi wireless charging 4.5W Reverse wireless charging
Talk time autonomy	feature not registered	feature not registered
Standby	feature not registered	feature not registered
➕ Other features
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
Call control	Voice dialing, Voice recorder	Voice dialing, Voice recorder, Voice commands
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: Bordeaux Red, Glacier Blue	• Colors: Graphite, White, Lavender, Olive
☢️ Radiation rate
	Oppo Find X (128GB)	Galaxy S21 FE (SM-G9900 128GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	0.674W/kg (head), 1.501W/kg (body)