vivo X21
#2913
vivo X21 UD
#2613Category Breakdown
vivo X21
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 X21 and vivo X21 UD share similar build quality, featuring a glass front with Gorilla Glass 3, an aluminum back, and an aluminum frame, both weighing 156.2g and having identical dimensions.
- Their displays are 6.28" Super AMOLED panels with a resolution of 1080 x 2280 pixels and a 60Hz refresh rate.
- Performance-wise, both models are powered by the Qualcomm Snapdragon 660 chipset, but the X21 UD offers 128GB of storage compared to the X21's 64GB.
- Camera specifications are identical, with a dual rear setup of 12 MP and 5 MP, and both support 1080p video recording.
- Battery capacity and charging capabilities are also the same at 3200mAh and 18W, respectively.
- Both run on Android 8.1 (Oreo) with Funtouch 4, providing a similar software experience.
Side-by-side Specification Comparison
vivo X21
vivo X21 UD
General
Release Date
2018
2018
Announced
2018
2018
Description
N/A
N/A
Display
Size
6.28"
6.28"
Type
Super AMOLED
Super AMOLED
Resolution
1080 x 2280 pixels, 19:9 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
Corning Gorilla Glass 3
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 6GB RAM, 128GB 6GB 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, 1/2.55", 1.4µm, dual pixel PDAF5 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
1080p@30fps
1080p@30fps
OIS
✗
✗
Night Mode
✗
✗
RAW Support
✗
✗
Battery
Capacity
3200 mAh
3200 mAh
Battery Details
Li-Ion 3200 mAh, non-removable
Li-Ion 3200 mAh, non-removable
Charging Details
18W wired
18W wired
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Design
Dimensions
154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in)
154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in)
Weight
156.2 g
156.2 g
Materials
Glass front (Gorilla Glass 3), aluminum back, aluminum frame
Glass front (Gorilla Glass 3), aluminum back, aluminum frame
Water Resistance
N/A
N/A
Colors
Black, Aurora White, Ruby Red
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, GLONASS
GPS, GLONASS
Software
Operating System
Android 8.1 (Oreo), Funtouch 4
Android 8.1 (Oreo), Funtouch 4
OS Version
Android 8.1 (Oreo), Funtouch 4
Android 8.1 (Oreo), Funtouch 4
Security
Fingerprint
✓
✓
Face Unlock
✗
✗
Sensors
Fingerprint (rear-mounted), accelerometer, proximity, compass
Fingerprint (under display, optical), accelerometer, proximity, compass
Audio
Stereo Speakers
✗
✗
Loudspeaker
Yes
Yes
Audio Jack
Yes
Yes