vivo X21i
#3726
ZTE nubia Prague S
#4270Category Breakdown
vivo X21i
ZTE nubia Prague S
Performance
72.965.4
Camera
19.119.1
Display
82.882.8
Battery
26.420.4
Build
0.20.2
Connectivity
56.052.9
Audio
8.98.9
Overall
39.035.0
Summary
- The vivo X21i features a larger 6.28-inch Super AMOLED display with a higher resolution of 1080 x 2280 pixels, compared to the ZTE nubia Prague S's 5.2-inch display at 1080 x 1920 pixels, providing a better viewing experience.
- In terms of performance, the X21i is powered by the more advanced Mediatek Helio P60 chipset, while the Prague S uses the older Snapdragon 615.
- The X21i's rear camera has a 12 MP sensor with dual pixel PDAF, offering better low-light performance than the Prague S's 13 MP camera with f/2.2 aperture.
- Battery capacity is also superior in the X21i at 3425 mAh versus the Prague S's 2200 mAh, allowing for longer usage.
- Both devices run different Android versions, with the X21i on Android 8.1 and the Prague S on the older Android 5.2, affecting software experience and features.
Side-by-side Specification Comparison
vivo X21i
ZTE nubia Prague S
General
Release Date
2018
2016
Announced
2018
2016
Description
N/A
N/A
Display
Size
6.28"
5.2"
Type
Super AMOLED
Super AMOLED
Resolution
1080 x 2280 pixels, 19:9 ratio (~402 ppi density)
1080 x 1920 pixels, 16:9 ratio (~424 ppi density)
PPI
1080
1080
Refresh Rate
60Hz
60Hz
HDR Support
✗
✗
Protection
N/A
N/A
Performance
Chipset
Mediatek MT6771 Helio P60 (12 nm)
Qualcomm MSM8939 Snapdragon 615 (28 nm)
CPU
Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
Octa-core (4x1.5 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53)
GPU
Mali-G72 MP3
Adreno 405
Memory
64GB 6GB RAM, 128GB 4GB RAM
64GB 3GB RAM
Expandable Storage
✗
✗
Card Slot
microSDXC (uses shared SIM slot)
microSDXC (uses shared SIM slot)
Camera
Main Camera
12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF5 MP, f/2.4, (depth)
13 MP, f/2.2, PDAF
Main Camera Features
LED flash, HDR, panorama
LED flash, panorama, HDR
Front Camera
24 MP, f/2.0, 26mm (wide), 1/2.8", 0.9µm
8 MP, f/2.4
Front Camera Features
N/A
N/A
Video Recording
1080p@30fps
1080p@30fps
Selfie Video
N/A
1080p@30fps
Optical Stabilization
✗
✗
Night Mode
✗
✗
Raw Photo Support
✗
✗
Battery
Capacity
3425 mAh
2200 mAh
Battery Details
Li-Ion 3425 mAh, non-removable
Li-Ion 2200 mAh, non-removable
Charging Details
18W wired
N/A
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Safety
Dimensions
154.4 x 75 x 7 mm (6.08 x 2.95 x 0.28 in)
148.2 x 72.5 x 6.8 mm (5.83 x 2.85 x 0.27 in)
Weight
159 g
135 g
Materials
N/A
N/A
Colors
Black, Aurora White, Ruby Red, Night Purple
White, Rose Gold
Foldable
✗
✗
SAR
N/A
N/A
Connectivity
SIM
Nano-SIM + Nano-SIM
Nano-SIM + Micro-SIM
Network
GSM / CDMA / HSPA / LTE
GSM / HSPA / LTE
Network Speed
HSPA, LTE
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 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, hotspot
Bluetooth
5.0, A2DP, LE
4.0, A2DP, LE
NFC
✗
✗
USB
microUSB 2.0, OTG
microUSB 2.0, OTG
IR Blaster
✗
✗
Headphone Jack
✓
✓
Radio
✗
✗
Positioning
GPS, GLONASS
GPS, GLONASS
Audio
Stereo Speakers
✗
✗
Loudspeaker
Yes
Yes
Audio Jack
Yes
Yes
Software & Security
Operating System
Android 8.1 (Oreo), Funtouch 4
Android 5.2 (Lollipop), nubia UI 3
Fingerprint
✓
✗
Face Unlock
✗
✗
Sensors
Fingerprint (rear-mounted), accelerometer, proximity, compass
Accelerometer, gyro, proximity, compass