Product
Vivo X20 Plus UD
Vivo X20 Plus UD
Vivo NEX S
Vivo NEX S
Battery
Charging 22.5W wired 22.5W wired
Type Li-Ion 3900 mAh, non-removable Li-Ion 4000 mAh, non-removable
Body
Build Glass front, aluminum back, aluminum frame -
Dimensions 155.3 x 80.1 x 7.5 mm (6.11 x 3.15 x 0.30 in) 162 x 77 x 8 mm (6.38 x 3.03 x 0.31 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 181.5 g (6.42 oz) 199 g (7.02 oz)
Comms
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE
NFC No No
Positioning GPS GPS, BDS, GNSS
Radio No No
USB microUSB 2.0, OTG USB Type-C 2.0, OTG
WLAN 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
Display
Resolution 1080 x 2160 pixels, 18:9 ratio (~376 ppi density) 1080 x 2316 pixels, 19.3:9 ratio (~388 ppi density)
Size 6.43 inches, 106.7 cm2 (~85.8% screen-to-body ratio) 6.59 inches, 107.3 cm2 (~86.0% screen-to-body ratio)
Type Super AMOLED Super AMOLED
Features
Sensors Fingerprint (under display, optical), accelerometer, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Launch
Announced 2018, January. Released 2018, January 2018, June. Released 2018, June
Status Discontinued Discontinued
Main Camera
Dual 12 MP, f/1.8, AF 5 MP, f/2.4, (depth) 12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF, 4-axis OIS 5 MP, f/2.4, (depth)
Features LED flash, HDR, panorama Dual-LED dual-tone flash, HDR, panorama
Video 1080p@30fps 4K@30fps, 1080p@30fps
Memory
Card slot microSDXC (uses shared SIM slot) No
Internal 128GB 4GB RAM 128GB 8GB RAM, 256GB 8GB RAM
  eMMC 5.1 -
Misc
Colors Matte Black, Gold, Rose gold Black, Red
Models - 1805, NEX S
Network
2G bands GSM 900 / 1800 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 8, 38, 39, 40, 41 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA 42.2/5.76 Mbps, LTE (4CA) Cat16 1024/150 Mbps
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / LTE
  CDMA 800 & TD-SCDMA CDMA 800 / 1900 & TD-SCDMA
Our Tests
Audio quality - Noise -93.6dB / Crosstalk -93.8dB
Battery (old) - Endurance rating 101h
Camera - Photo / Video
Display - Contrast ratio: Infinite (nominal), 4.012 (sunlight)
Loudspeaker - Voice 71dB / Noise 74dB / Ring 91dB
Performance - AnTuTu: 287081 (v7), 351286 (v8) GeekBench: 9160 (v4.4), 2252 (v5.1) GFXBench: 34fps (ES 3.1 onscreen)
Platform
Chipset Qualcomm SDM660 Snapdragon 660 (14 nm) Qualcomm SDM845 Snapdragon 845 (10 nm)
CPU Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) Octa-core (4x2.7 GHz Kryo 385 Gold & 4x1.7 GHz Kryo 385 Silver)
GPU Adreno 512 Adreno 630
OS Android 7.1.1 (Nougat), Funtouch 3.2 Android 8.1 (Oreo), upgradable to Android 9.0 (Pie), Funtouch 6.6
Selfie camera
Single 12 MP, f/2.0, (wide), 1/2.8", 1.28µm Motorized pop-up 8 MP, f/2.0
Video 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
  32-bit/192kHz Hi-Res audio 32-bit/192kHz Hi-Res audio