OPPO Reno4 5G vs. Vivo V21 5G

Phone Comparison, Reviews and Tests

In depth comparison and review of OPPO Reno4 5G and Vivo V21 5G. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.

Phone Specifications Comparison

OPPO Reno4 5G vs. Vivo V21 5G Comparison Chart
DESIGN AND DIMENSIONS OPPO Reno4 5G Vivo V21 5G
Product Type Smartphone Smartphone
Manufacturer Model Number CPH2091 V2050
Form Factor Touch Touch
Height 159.3 mm 159.68 mm Vivo V21 5G has greater height than OPPO Reno4 5G.
Width 74 mm 73.9 mm OPPO Reno4 5G has greater width than Vivo V21 5G.
Depth 7.8 mm 7.29 mm Vivo V21 5G is narrower than OPPO Reno4 5G.
Weight 183 g 176 g Vivo V21 5G is lighter than OPPO Reno4 5G.
Body Colour Space black | Galactic blue Dusk blue | Sunset dazzle
Body Material - Matte glass
Waterproof (Water-resistant) - -
IP rating IP54 IP52
SAR Value 0.886 W/kg (head), 1.155 W/kg (body), 2.165 W/kg (limb) 1.09 W/kg (body), 3.19 W/kg (limb), 0.91 W/kg (head)
Connector Type USB Type-C - 24 pin USB-C USB Type-C - 24 pin USB-C
SIM Card Type (Size) Nano SIM Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
SIM Card Configuration Details - Nano SIM + nano SIM/microSD
DISPLAY OPPO Reno4 5G Vivo V21 5G
Display Type OLED display OLED display
Display Technology AMOLED AMOLED
Screen Size (Display Size) 6.4" 6.44" Vivo V21 5G has larger screen size than OPPO Reno4 5G.
Screen Resolution (Display Resolution) 2400 x 1080 pixels 2404 x 1080 pixels Vivo V21 5G has better screen resolution than OPPO Reno4 5G.
Display Format Full HD+ Full HD+
Pixel Density 409 ppi -
Aspect Ratio 20:9 20:9
Max Brightness 800 cd/m² 800 cd/m² Both phones have the same display brightness
Colour Depth 16.7 million colours -
Contrast Ratio 800000:1 6000000:1 Vivo V21 5G has better display contrast ratio than OPPO Reno4 5G.
HDR - Yes Vivo V21 5G has HDR.
HDR Technology - HDR10+
Display Refresh Rate 60 Hz 90 Hz Vivo V21 5G has better refresh rate than OPPO Reno4 5G.
Display Features DCI-P3 Wide colour gamut, Dark mode, 180Hz sampling rate -
Display Protection (Screen Protector) Corning Gorilla Glass (scratch resistant glass) -
PROCESSOR OPPO Reno4 5G Vivo V21 5G
Processor Type (CPU) Qualcomm Snapdragon 765G MediaTek Dimensity 800U
Clock Speed 2.4 GHz 2.4 GHz Both phones have the same clock speed.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
Graphics System (GPU) Qualcomm ADRENO 620 -
MEMORY OPPO Reno4 5G Vivo V21 5G
RAM LPDDR4X SDRAM - 8 GB 8 GB Both phones have the same RAM size.
Internal Memory Size (Storage Capacity) 128 GB 128 GB Both phones have the same internal memory capacity.
Memory Interface UFS 2.1 UFS 2.2
Supported Flash Memory Cards (Expandable Memory) - microSDHC, microSD, microSDXC - up to 1 TB
CAMERA OPPO Reno4 5G Vivo V21 5G
MAIN CAMERA
Number of Main Cameras 3 3
Sensor Resolution 48 Megapixel 64 Megapixel Vivo V21 5G has better camera resolution than OPPO Reno4 5G.
Sensor Size 1/2" -
Sensor Name Sony Exmor RS IMX586 sensor -
Lens Aperture F/1.7 F/1.79 OPPO Reno4 5G has better lens aperture than OPPO Reno4 5G.
Lens Construction 6-element -
Pixel Size 0.8 μm -
Optical Image Stabiliser (OIS) - 4-axis OIS (Optical Image Stabilisation) Vivo V21 5G has optical stabilisation.
Focus Adjustment Automatic Automatic
Laser Auto Focus Yes -
Minimum Focal Length (Focal Distance) 26 mm -
Digital Zoom - 10x
Special Effects HDR, Bokeh effect Bokeh effect
Camera Modes Time-lapse mode, night mode, Expert Mode, Text, AI Beautify, AI Portait, Pano mode, Dazzle Colour Mode Beauty mode, Night, Filter mode, Portrait video, Dual video mode, ultra stable video, kid's face beauty, double exposure
Light Source LED flash LED flash
Still Image Resolutions 8000 x 6000 -
Video Resolutions 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, 1280 x 720 (720p) at 60 fps 3840 x 2160 (4K), 1920 x 1080 (1080p) at 120 fps, 1280 x 720 (720p) at 120 fps
Camera Features (Functions) Noise reduction, Phase Detect Auto-Focus (PDAF), Electronic Image Stabiliser (EIS), Closed loop processing, 4-in-1 Pixel technology, Ultra Steady Video, contrast detection auto-focus (CDAF), laser detection auto focus (LDAF) Eye Autofocus
SECOND CAMERA
Sensor Resolution (2nd Camera) 8 Megapixel 8 Megapixel Both phones have the same second camera resolution.
Lens Type (2nd Camera) Ultra wide-angle lens Wide-angle lens
Lens Aperture (2nd Camera) F/2.2 F/2.2 Both phones have the same second camera lens aperture.
Lens Element Qty (2nd Camera) 5-element -
Field of View (2nd Camera) 119 degree(s) 120 degree(s) Vivo V21 5G has larger second camera lens field of view than OPPO Reno4 5G.
Minimum Focal Length (2nd Camera) 16 mm -
Camera Functions (2nd Camera) Monochrome -
Camera Modes (2nd Camera) Ultra Night Mode 3.0 -
Camera Features (2nd Camera) 5-piece lens, Ultra Steady Video Pro -
THIRD CAMERA
Sensor Resolution (3rd Camera) 2 Megapixel 2 Megapixel Both phones have the same third camera resolution.
Lens Aperture (3rd Camera) F/2.4 F/2.4 Both phones have the same lens aperture of the third camera.
Lens Element Qty (3rd Camera) 3-element -
Camera Functions (3rd Camera) - Super macro camera
Camera Features (3rd Camera) - 4cm macro photography
FRONT CAMERA
Number of Front Cameras 2 1
Sensor Resolution (Front) 32 Megapixel 44 Megapixels Vivo V21 5G has better front camera resolution than OPPO Reno4 5G.
Sensor Name (Front) Sony Exmor RS IMX616 sensor -
Lens Aperture (Front) F/2.4 F/2.0 Vivo V21 5G has better front lens aperture than OPPO Reno4 5G.
Lens Element Qty (Front) 5-element -
Pixel Size (Front) 0.8 μm -
Special Effects (Front) - HDR
Camera Modes (Front) Panorama, Time-lapse mode, Slow motion mode, night mode, Expert Mode, AI Beauty, Portrait Beauty mode, Night, Filter mode, Dual video mode, ultra stable video, kid's face beauty, double exposure, AI night portrait
Light Source (Front) Display flash Dual LED flash
Still Image Resolutions (Front) 6560 x 4928 -
Video Resolutions (Front) 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps 3840 x 2160 (4K)
Camera Features (Front) Electronic Image Stabiliser (EIS), 5P lens Optical Image Stabilisation (OIS), 2 x digital zoom, Eye Autofocus
SECOND FRONT CAMERA
Sensor Resolution (2nd Front) 2 Megapixel -
Lens Aperture (2nd Front) F/2.4 -
Pixel Size (2nd Front) 1.75 μm -
Camera Functions (2nd Front) Portait camera -
Camera Features (2nd Front) 3-piece lens -
BATTERY AND CHARGING OPPO Reno4 5G Vivo V21 5G
Battery Capacity (Battery Size) 4020 mAh 4000 mAh OPPO Reno4 5G has larger battery capacity than Vivo V21 5G.
Fast Charging Technology SuperVOOC 2.0 Flash Charge - OPPO Reno4 5G has fast charging technology.
Recharge Time (Charging Time) 36 min -
Standby Time 390 hours -
Talk Time 1560 minutes -
Run Time Details Standby: up to 390 hrs
Talk: up to 1560 min
Playback (Music): up to 37 hrs
Playback (video): up to 17.1 hrs
-
CELLULAR OPPO Reno4 5G Vivo V21 5G
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 5G 5G Both phones have the same mobile network generation.
Operating System ColorOS 7.2 (based on Android 10) Funtouch OS 11.1 (based on Android 11)
Navigation GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS OPPO Reno4 5G Vivo V21 5G
Data Transmission FDD-LTE, TDD-LTE, 5G NR FR1 FDD-LTE, TDD-LTE, 5G NR FR1
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
3G UMTS Band Band 1, Band 2, Band 4, Band 5, Band 6, Band 8, Band 19 Band 1, Band 2, Band 4, Band 5, Band 8
3G UMTS Frequency 2100, 1900, 1700, 850, 800, 900, 800 2100, 1900, 1700, 850, 900
4G LTE Band Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3
5G NR Band N1, n3, n5, n7, n8, n20, n28, n38, n41, n77, n78, n40 N1, n3, n7, n8, n28, n41, n78, n40
5G NR Frequency FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, TDD TD 3700, TDD TD 3500, TDD 2300 FDD 2100, FDD 1800, FDD 2600, FDD 900, FDD 700APT, TDD TD 2500, TDD TD 3500, TDD 2300
Wireless Interface IEEE 802.11a/b/g/n/ac Wi-Fi
Bluetooth Bluetooth 5.1 Bluetooth 5.1
NFC Yes Yes Both phones have an NFC reader for mobile payments.
MEDIA OPPO Reno4 5G Vivo V21 5G
Supported Digital Audio Standards WAV, WMA, AAC, AMR, MP3, FLAC, OGG, APE (Monkey's Audio), apt-X, LDAC, MID, SBC, apt-X HD, APTX-TWS+ WAV, MPEG 2 Audio, MP3, FLAC, MIDI, APE (Monkey's Audio), Vorbis
Supported Digital Video Standards MKV, FLV, AVI, MOV, WMV, 3GP, MP4 MKV, FLV, 3GP, MP4
Sound Enhancements Dolby Atmos sound technology -
FEATURES OPPO Reno4 5G Vivo V21 5G
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert
Sensors Accelerometer, ambient light sensor, proximity sensor, pedometer, gyro sensor, geomagnetic sensor, gravity sensor Accelerometer, ambient light sensor, proximity sensor, digital compass, gyroscope
Security Devices Fingerprint reader (under display) Fingerprint reader (under display)
Additional Phone Features MU-MIMO technology, Google Lens Fast Charging, 3 GB of external memory space for RAM
OTHERS OPPO Reno4 5G Vivo V21 5G
Included Accessories Headphones, power adapter, SIM card removal tool, USB-C cable, protective case Headset, headset adapter, SIM card removal tool, pre-installed screen protection film, USB-C cable, protective case
Compliant Standards IP54, TUV Rheinland Certified Safe Fast-Charge System IP52
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