vivo S1 (China) vs vivo X20 Plus

Network
2G network

GSM 850, 900, 1800, 1900

GSM 900, 1800; CDMA 800 & TD-SCDMA
3G network

HSDPA 850, 900, 1900, 2100

HSDPA 850, 900, 1900, 2100
4G network

LTE frequency band 1(2100), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSPA speed

-

HSPA
EV-DO speed

3.1 Mbps download, 1.8 Mbps upload

-
LTE speed

LTE Cat 7, 301 Mbps download, 102 Mbps upload

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic

-
SIM

Dual SIM (Nano-SIM, dual stand-by)

Hybrid Dual SIM (Nano-SIM, dual stand-by)
Height

161.97 mm

165.3 mm
Width

75.93 mm

80.1 mm
Thickness

8.54 mm

7.5 mm
Weight

189 g

181.5 g
Colors

Black, Pink

Gold, Matte Black, Rose gold

Display
Display type

IPS capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

6.53 inches

6.43 inches
Resolution

1080 x 2340 pixels

1080 x 2160 pixels
Pixel density

395 ppi

376 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5

-
Multitouch

Yes

Yes

Main camera
Camera type

Triple

Dual
Main camera

12 MP, f/1.7 , 1/2.8" , 1.12 µm

12 MP, f/1.8
8 MP, f/2.2 , 13 mm

5 MP
5 MP, f/2.4
Primary camera resolution

4032 x 3024 pixels

-
Primary camera video

1080@30fps

1080p@30fps
Primary camera Autofocus

-

autofocus
Primary camera flash

LED flash

LED flash
Camera features

Autofocus, continuous shooting, digital zoom, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection

Geo-tagging, HDR, face detection, panorama, touch focus
DxOMark photo

-

92
DxOMark video

-

87
DxOMark camera score

-

90

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

-

Yes
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
USB

microUSB 2.0

microUSB 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v4.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

-
Beidou

Yes

-

Features
Messaging SMS

-

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

-

Email
Messaging Push Email

-

Push Email
Java

-

No
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity, light

Fingerprint (rear-mounted), accelerometer, compass, gyro, proximity