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vivo X21 vs realme 8 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

Comparison mode:
Specs Size
Differences only
vivo X21
realme 8
vivo X21 realme 8
Released · May 29, 2018
Released · Mar 25, 2021
6.3-inch · 2280x1080px
6.4-inch · 2400x1080px
Dual camera
Quad camera
6GB · 128GB
4GB · 128GB
3200 mAh
5000 mAh
Check prices

Availability

Officially announced
Mar 24, 2021
Prices (MSRP)
€199

Design

Dimensions
6.08 x 2.94 x 0.29 inches
154.45 x 74.78 x 7.37 mm 		6.32 x 2.91 x 0.31 inches
160.6 x 73.9 x 8 mm
Weight
5.51 oz (156.2 g) 6.24 oz (177.0 g)
Materials
Back: Aluminum
Frame: Aluminum 		Back: Plastic
Frame: Plastic
Biometrics
2D Face unlock, Optical in-screen fingerprint Optical in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key Right: Volume control, Lock/Unlock key
Colors
Black Cyber Silver, Cyber Black

Display

Size
6.3-inch, 85.36% screen-to-body 6.4-inch, 83.34% screen-to-body
Type
Super AMOLED Super AMOLED, 60Hz, 1000 nits
Resolution
2280x1080px, 402 PPI 2400x1080px, 20:9 ratio, 411 PPI

Hardware

System chip
Snapdragon 660 SDM660 (14 nm) MediaTek Helio G95 MT6785V (12 nm)
Processor
Octa-core
2200 MHz
Kryo 260 		Octa-core
2050 MHz
Cortex-A76
GPU
Adreno 512 Mali G76
Memory
6GB (LPDDR4)/128GB 4GB (LPDDR4)/128GB (UFS 2.1)
6GB/128GB
8GB/128GB
Storage expansion
microSDXC up to 256 GB microSDXC
OS
Android (8.1 Oreo) Android (11)

Battery

Type
3200 mAh, Li - Ion 5000 mAh, Li - Polymer
Charging
Fast charging Fast charging
Charge speed
Wired: 30.0W

Camera

Rear
Dual camera Quad camera
Main camera
12 MP (PDAF)
Aperture size: F1.8
Sensor size: 1/2.8"
Pixel size: 1.28 μm 		64 MP (PDAF)
Aperture size: F1.8
Focal length: 26 mm
Sensor size: 1/1.7"
Pixel size: 0.8 μm
Second camera
5 MP (Depth information)
Aperture size: F2.4 		8 MP (Ultra-wide)
Aperture size: F2.2
Focal Length: 16 mm
Sensor size: 1/4"
Pixel size: 1.12 μm
Third camera
2 MP (Macro)
Aperture size: F2.4
Fourth camera
2 MP (Black and White)
Aperture size: F2.4
Flash
LED LED
Video recording
1080p (30 fps)
Time-lapse video, Video calling, Video sharing 		4K UHD (30 fps), 1080p (120 fps), 720p (240 fps)
Time-lapse video, Picture-taking during video recording, EIS
Front
12 MP
Video capture: 1080p 		16 MP (HDR)
Video capture: 1080p

Connectivity & Features

Bluetooth
5.0 5.1
WLAN
a,b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac 		a,b,g,n,ac
Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac
USB
microUSB, USB 2.0 Type-C, USB 2.0
Sensors
Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor
Location
GPS, A-GPS, Glonass GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
VoIP, Tethering, Computer sync, OTA sync

Multimedia

Headphones
3.5mm jack 3.5mm jack
Speakers
Earpiece, Loudspeaker Earpiece, Loudspeaker
Features
Album art cover, Background playback
Screen mirroring
Wireless screen share Wireless screen share
Radio
FM FM
Additional microphone(s)
Noise cancellation Noise cancellation

Cellular

4G (FDD) Bands
1, 3, 5 1, 3, 5, 8
4G (TDD) Bands
40, 41 38, 40, 41
3G Bands
5, 8, 1 4, 5, 8
Data Speed
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s LTE-A, HSDPA+ (4G) 42.2 Mbit/s
Dual SIM
Yes No
SIM type
Nano SIM Nano SIM

Regulatory Approval

Measured SAR
Head: 1.18 W/kg
Body: 0.57 W/kg

Alternative variants

With 6GB RAM
Memory 6GB
With 8 GB RAM
Memory 8GB
FCC OKs Cingular\'s purchase of AT&T Wireless