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Samsung Galaxy S21 vs Oppo Reno4 Z 5G

Side by side comparison between Samsung Galaxy S21 vs Oppo Reno4 Z 5G phones, differences, pros, cons with full specifications. What's the better?

,
Samsung Galaxy S21
6.2"
AMOLED

1080x2400

12.2
MP

10mp

8GB
RAM

64bit Octa

4000
mAh

(Non removable)

vs
Oppo Reno4 Z 5G
6.57"
IPS

1080x2400

48
MP

16mp

8GB
RAM

64bit Octa

4000
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21

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 S2129 Advantages Samsung Galaxy S21vsReno4 Z 5G5 Advantages Oppo Reno4 Z 5G
+2.9Ghz 64bit Octa-Core38%
More powerful processor, you can open your applications faster
vs2Ghz 64bit Octa-Core
+8GB LPDDR5Advantage
This RAM type is better and more efficient.
vs8GB LPDDR4X
+UFS 3.0Advantage
Fastest write and read storage.
vsUFS 2.1
+169 grams (5.92 ounces)9%
Lighter
vs184 grams (6.44 ounces)
+7.9 millimeters (0.31 inches)3%
Thinner
vs8.1 millimeters (0.32 inches)
+Aluminum body, glass front, plastic backAdvantage
More resistant material
vsPlastic body, glass front
+Dynamic AMOLEDAdvantage
Dynamic AMOLED display is brighter and more vivid
vsLTPS IPS LCD
+HDR10+Advantage
The HDR10+ display provides vibrant colors and more details
vsNot supported
+424 PPI6%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
vs401 PPI
+(triple camera) 12.2MP + 64MP + 12MP47%
Higher resolution main camera
vs(quad camera) 48MP + 8MP + 2MP + 2MP
+Digital and optical zoomAdvantage
The zoom allows for better focus and approach to take pictures
vsOnly digital zoom
+OIS: Optical stabilizationAdvantage
Image stabilization prevents blurry photos and helps in recording motion video
vsEIS: Digital stabilization
+BSI sensorAdvantage
The BSI sensor allows the entry of more light generating photos with more detail and brightness
vsNot supported
+1/1.76" inches14%
The larger sensor camera lets you take photos with better depth.
vs1/2" inches
+8K UHD (7680x4320)3 times
More image quality for recording videos with the primary camera
vs4K UHD (3840x2160)
+(front) 4K UHD (3840x2160)3 times
More image quality for recording videos with the secondary camera
vs(front) Full HD (1920x1080)
+Android 11Advantage
Android 11 is newer and safer
vsAndroid 10
+5G NRAdvantage
The 5G NR network is newer and faster
vs5G SA/NSA
+(5G NR) 5000 Mbps43%
Faster for surfing the internet and download files
vs(5G SA/NSA) 3500 Mbps
+BarometerAdvantage
Sensors help you use the device
vsNot supported
+ANT+Advantage
Sensors help you use the device
vsNot supported
+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.
vs18W
+Qi wireless charging (Qi/PMA)Advantage
Wireless charging is another way to charge the battery.
vsNot supported
+2 slots (Dual-SIM) + e-SIM (Eletronic)Advantage
More SIM card slots. You can choose more carriers.
vs2 slots (Dual-SIM)
+FMAdvantage
The radio lets you listen to your songs and sports in general
vsNot supported
+802.11 a/b/g/n/ac/ax (2.4Ghz, 5Ghz) Wifi6 + MIMOAdvantage
WiFi 802.11 a/b/g/n/ac/ax (2.4Ghz, 5Ghz) Wifi6 + MIMO is newer and faster
vs802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO
+DLNAAdvantage
With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.
vsNot supported
+USB 3.2 Type-C, USB OTG On-The-GoAdvantage
Newer and faster USB version for transferring photos, mp3 or data.
vsUSB 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
vsNot supported
6.2"vs+6.57"6%
Larger screen
f/1.8 (aperture)vs+f/1.7 (aperture)6%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 10MPvs+(dual front camera) 16MP + 2MP79%
Higher resolution secondary camera to take pictures and selfies
Type-C reversible connectorvs+3.5mm jackAdvantage
Headsets with 3.5mm Jack size are more common and easy to find in stores
5.0 + A2DP/LEvs+5.1 + A2DP/LEAdvantage
Bluetooth 5.1 + A2DP/LE is newer and faster

26 Common items in both devices
128GB (104GB available) / 128GB (108GB available)
120Hz
16 million
1080x2400 pixels
LED flash
PDAF: phase detection autofocus on both cameras / PDAF: phase detection autofocus
HDR photo/video on both cameras / HDR photo on both cameras
+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 differencesClear highlight
Physical featuresSamsung Galaxy S21Oppo Reno4 Z 5G
ModelGalaxy S21Reno4 Z 5G
Other model namesGalaxy S21 5G SM-G991B/DSOppo Reno 4 Z 5G CPH2065
Country or region available(Global, International)
(Global, International)
(Global, International)
(Global, International)
BrandSamsungOppo
Release dateJanuary, 2021October, 2020
Depth7.9 millimeters (0.31 inches)8.1 millimeters (0.32 inches)
Size (width x height)71.2 x 151.7 millimeters (2.8 x 5.97 in)75.5 x 163.8 millimeters (2.97 x 6.45 in)
Weight169 grams (5.92 ounces)184 grams (6.44 ounces)
Qwerty physical keyboardNot supportedNot supported
AntennaInternal antennaInternal antenna
Build, materialsAluminum body, glass front, plastic backPlastic body, glass front
Protection against water and othersIP68 certified: dust proof and waterproof over 1.5 meter and 30minNot supported
System (OS)Samsung Galaxy S21Oppo Reno4 Z 5G
Operating systemAndroid 11Android 10
Firmware updatefeature not registeredfeature not registered
HardwareSamsung Galaxy S21Oppo Reno4 Z 5G
Chipset64bit - Samsung Exynos 2100 (5nm)64bit - MediaTek MT6873V Dimensity 800 (7nm)
CPU processorOcta-Core, 3 processors:
2.9Ghz Single-Core ARM Cortex-X1
2.8Ghz 3-Cores ARM Cortex-A78
2.2Ghz Quad-Core ARM Cortex-A55
Octa-Core, 2 processors:
2Ghz Quad-Core ARM Cortex-A76
2Ghz Quad-Core ARM Cortex-A55
GPU graphical controllerARM Mali-G78 MP14ARM Mali-G57 MC4
RAM memory8GB LPDDR58GB LPDDR4X
Internal storage128GB (104GB available)
UFS 3.0
128GB (108GB available)
UFS 2.1
External storageNot supportedNot supported
DisplaySamsung Galaxy S21Oppo Reno4 Z 5G
Display typeDynamic AMOLEDLTPS IPS LCD
Screen size6.2" inches6.57" inches
Screen-to-body ratio~85.9% (screen-to-body ratio)~84.3% (screen-to-body ratio)
Display resolution1080x2400 pixels (20:9)1080x2400 pixels (20:9)
TouchscreenCapacitive Multitouch 10-pointsCapacitive Multitouch
Pixel density (dot pitch)424 PPI401 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass VictusGorilla Glass 3
Display features120Hz, 1300 nits, HDR10+120Hz, 480 nits
Mobile networksSamsung Galaxy S21Oppo Reno4 Z 5G
Dual-SIMDual-SIM Standby - Call active on one sim cardDual-SIM Standby - Call active on one sim card
SIM card2 slots (Dual-SIM)
nano-SIM (4FF) + e-SIM
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum download/upload5000/1920 Mbps3500/1920 Mbps
Network technology2G, 3G, 4G, 5G2G, 3G, 4G, 5G
Frequency, bandsExpand band detailsCollapse details
GSM Mhz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkCDMA 800/1900, GSM 850/900/1800/1900GSM 850/900/1800/1900
Primary 3G networkCDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 850/900/1700/1900/2100
UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat24 ()
TD-LTE ()
VoLTE
LTE Cat (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 66)
TD-LTE (38, 39, 40, 41)
VoLTE
Primary 5G networkSA/NSA/Sub6 ()SA/NSA (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78)
Primary data networkGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, 5G SA/NSA, 5G NRGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, 5G SA/NSA
Secondary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkGPRS, EDGEGPRS, EDGE
CallingSamsung Galaxy S21Oppo Reno4 Z 5G
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
SpeakerphoneSupportedSupported
Video callingSupportedSupported
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder, Voice commands
CameraSamsung Galaxy S21Oppo Reno4 Z 5G
Back camera (main camera)(triple camera)
12.2 megapixels
64MP telephotof/2.029mm1/1.72"0.8µmPDAFOIS1.1x-optical-zoom3x-hybrid-zoom
12MP ultrawidef/2.213mm120º1/2.55"1.4µmSuper-Steady-video
(quad camera)
48 megapixels
8MP ultrawidef/2.2119º1/4.0"1.12µm
2MP depthf/2.4
2MP depthf/2.4
Main camera resolution4032x3024 pixels8000x6000 pixels
Video recording (primary)8K UHD (7680x4320) 24 fps4K UHD (3840x2160) 30 fps
FlashLED flashLED flash
Focal aperturef/1.8 (aperture)f/1.7 (aperture)
Focal length26mm lens26mm lens
Sensor size1/1.76" inches1/2" inches
Pixel size1.8µm pixel0.8µm pixel
AutofocusPDAF: phase detection autofocus on both camerasPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationOIS: Optical stabilizationEIS: Digital stabilization
ZoomDigital and optical zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorSupportedNot supported
HDRHDR photo/video on both camerasHDR photo on both cameras
2ª cameraSamsung Galaxy S21Oppo Reno4 Z 5G
Front camera (secondary)10 megapixels(dual front camera)
16 megapixels
2MP depthf/2.4
Front camera resolution3872x2592 pixels4608x3456 pixels
Video recording (secondary)4K UHD (3840x2160)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/2.2 (aperture)f/2.0 (aperture)
Focal length26mm lens26mm lens
Sensor size1/3.24" inches1/3.06" inches
Pixel size1.22µm pixel1µm pixel
MultimediaSamsung Galaxy S21Oppo Reno4 Z 5G
RadioFMNot supported
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviD, MKVMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC
ConnectivitySamsung Galaxy S21Oppo Reno4 Z 5G
USBUSB 3.2 Type-C, USB OTG On-The-GoUSB 2.0 Type-C, USB OTG On-The-Go
TV outputUSB Type-C (reversible)USB Type-C (reversible)
Audio outputType-C reversible connector3.5mm jack
Bluetooth5.0 + A2DP/LE5.1 + A2DP/LE
WiFi802.11 a/b/g/n/ac/ax (2.4Ghz, 5Ghz) Wifi6 + MIMO802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO
DLNASupportedNot supported
NFCSupportedSupported
GPSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDouA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS
Infrared portNot supportedNot supported
Other functionsSamsung Galaxy S21Oppo Reno4 Z 5G
Active noise cancellationSupportedSupported
Vibrating alertSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
SensorsAccelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Barometer
Gesture
Hall effect
Face unlock
Fingerprint sensor (under display)
ANT+
Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Face unlock
Fingerprint sensor (side-mounted)
Other features- Colors: Phantom Gray, White, Violet, Pink
- One UI 3.1
- Always-on display
- Tuned by AKG
- 32-bit/384kHz audio
- Samsung Pay (Visa, MasterCard)
- Samsung DeX
- WiFi direct, hotspot
- Colors: Ink Black, Dew White
- ColorOS 7.2
- 24-bit/192kHz audio
- Case included
- WiFi direct, hotspot
Power supplySamsung Galaxy S21Oppo Reno4 Z 5G
BatteryLiPo: Li-Ion polymer (Non removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity4000 mAh4000 mAh
Charger, watts25W Fast battery charging
15W Qi wireless charging (Qi/PMA)
4.5W Reverse wireless charging between devices
USB Power Delivery 3.0
18W (9V/2A) Fast battery charging
Talk time autonomyfeature not registered1560 minutes | 26 hours | 1.1 days
Standbyfeature not registered21600 minutes | 360 hours | 15 days
Radiation rateSamsung Galaxy S21Oppo Reno4 Z 5G
SAR 1.6W/kg (USA, Mexico, etc.)feature not registeredfeature not registered
SAR 2W/kg (Europe, UK, etc.)0.456W/kg (head) | 1.509W/kg (body)feature not registered
X

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