vivo X20
#2912
vivo X21 UD
#2613Category Breakdown
vivo X20
vivo X21 UD
Performance
62.564.8
Camera
42.442.4
Display
79.579.5
Battery
43.543.5
Build
79.879.8
Overall
59.760.4
Summary
- The vivo X20 features a 6.01-inch Super AMOLED display with a resolution of 1080 x 2160 pixels, while the vivo X21 UD has a slightly larger 6.28-inch Super AMOLED display with a resolution of 1080 x 2280 pixels.
- Both models utilize the Qualcomm Snapdragon 660 chipset, but the X21 UD offers more RAM at 6GB compared to the X20's 4GB, enhancing performance.
- In terms of camera capabilities, both phones have a dual rear camera setup with a 12 MP main sensor, but the X21 UD includes dual pixel PDAF for improved focus.
- The X20 has a 3250 mAh battery, while the X21 UD has a slightly smaller 3200 mAh battery but supports 18W fast charging.
- The X20 runs on Android 7.1.1, upgradable to Android 8.0, whereas the X21 UD comes with Android 8.1 out of the box, providing a more updated software experience.
- Both devices have a premium build with glass fronts and aluminum backs but differ slightly in dimensions and weight.
Side-by-side Specification Comparison
vivo X20
vivo X21 UD
General
Release Date
2017
2018
Announced
2017
2018
Description
N/A
N/A
Display
Size
6.01"
6.28"
Type
Super AMOLED
Super AMOLED
Resolution
1080 x 2160 pixels, 18:9 ratio (~402 ppi density)
1080 x 2280 pixels, 19:9 ratio (~402 ppi density)
PPI
1080
1080
Refresh Rate
60Hz
60Hz
Peak Brightness
N/A
N/A
HDR Support
✗
✗
Protection
N/A
Corning Gorilla Glass 3
Performance
Chipset
Qualcomm SDM660 Snapdragon 660 (14 nm)
Qualcomm SDM660 Snapdragon 660 (14 nm)
CPU
Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
GPU
Adreno 512
Adreno 512
Memory
64GB 4GB RAM
128GB 6GB RAM
Expandable Storage
✗
✗
Card Slot
microSDXC (uses shared SIM slot)
microSDXC (uses shared SIM slot)
Camera
Main Camera
12 MP
12 MP
Main Camera Details
12 MP, f/1.8, AF5 MP, f/2.4, (depth)
12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF5 MP, f/2.4, (depth)
Front Camera
12 MP
12 MP
Front Camera Details
12 MP, f/2.0, (wide), 1/2.8", 1.28µm
12 MP, f/2.0, (wide), 1/2.8", 1.28µm
Video Recording
1080p@30fps
1080p@30fps
Selfie Video
N/A
1080p@30fps
OIS
✗
✗
Night Mode
✗
✗
RAW Support
✗
✗
Battery
Capacity
3250 mAh
3200 mAh
Battery Details
Li-Ion 3250 mAh, non-removable
Li-Ion 3200 mAh, non-removable
Charging Details
N/A
18W wired
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Design
Dimensions
155.9 x 75.2 x 7.2 mm (6.14 x 2.96 x 0.28 in)
154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in)
Weight
159 g
156.2 g
Materials
Glass front, aluminum back, aluminum frame
Glass front (Gorilla Glass 3), aluminum back, aluminum frame
Water Resistance
N/A
N/A
Colors
Matte Black, Black/Gold, Gold, Rose gold, Blue, Pink
Black, Ruby Red
Foldable
✗
✗
Connectivity
SIM
Nano-SIM + Nano-SIM
Nano-SIM + Nano-SIM
Network
GSM / CDMA / HSPA / LTE
GSM / CDMA / HSPA / LTE
Network Speed
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
5G
✗
✗
4G
✓
✓
WiFi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
5.0, A2DP, LE
5.0, A2DP, LE
NFC
✗
✗
USB
microUSB 2.0, OTG
microUSB 2.0, OTG
IR Blaster
✗
✗
Headphone Jack
✓
✓
Radio
✗
✗
Positioning
GPS
GPS, GLONASS
Software
Operating System
Android 7.1.1 (Nougat), upgradable to Android 8.0 (Oreo), Funtouch 3.2
Android 8.1 (Oreo), Funtouch 4
OS Version
Android 7.1.1 (Nougat), upgradable to Android 8.0 (Oreo), Funtouch 3.2
Android 8.1 (Oreo), Funtouch 4
Security
Fingerprint
✓
✓
Face Unlock
✗
✗
Sensors
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Fingerprint (under display, optical), accelerometer, proximity, compass
Audio
Stereo Speakers
✗
✗
Loudspeaker
Yes
Yes
Audio Jack
Yes
Yes