Asus Zenfone 3 ZE520KL vs vivo X20

Asus Zenfone 3 ZE520KL

vivo X20

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 1900, 2100, 800

HSDPA 850, 900, 1900, 2100
4G network

LTE frequency band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 18(800), 19(800), 26(850), 28(700), 38(2600), 39(1900), 40(2300), 41(2500)

LTE frequency band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42.2 Mbps

-
HSUPA speed

5.76 Mbps

-
HSPA speed

-

HSPA
LTE speed

LTE, Cat6, 300 Mbps download, 50 Mbps upload

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
SIM

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

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

146.9 mm

155.9 mm
Width

74 mm

75.2 mm
Thickness

7.7 mm

7.2 mm
Weight

144 g

159 g
Colors

Moonlight White, Sapphire Black, Shimmer Gold

Black/Gold, Gold, Matte Black, Rose gold

Display
Display type

Super IPS+ capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

5.2 inches

6.01 inches
Resolution

1080 x 1920 pixels

1080 x 2160 pixels
Pixel density

424 ppi

402 ppi
Display colors

16777216

16777216
Protection

Corning Gorilla Glass 3

-
Multitouch

Yes

Yes

Main camera
Camera type

-

Dual
Main camera

16 MP, f/2.0

12 MP, f/1.8
5 MP
Primary camera video

1080p@30fps

1080p@30fps
Primary camera Autofocus

-

autofocus
Primary camera flash

dual-LED (dual tone) flash

LED flash
Primary camera optical image stabilization

4-axis optical image stabilization

-
Primary camera phase detection autofocus

phase detection autofocus

-
Primary camera laser autofocus

laser autofocus

-
Camera features

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

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

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

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

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

-

Yes
USB

Type-C 1.0 reversible connector

microUSB 2.0
USB On-The-Go

-

Yes
Bluetooth

v4.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth EDR

Yes

-
Infrared

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

-
BDS

Yes

-

Features
Messaging SMS

SMS(threaded view)

SMS(threaded view)
Messaging MMS

MMS

MMS
Messaging Email

Email

Email
Messaging IM

IM

-
Messaging Push Email

Push Email

Push Email
Java

No

No
Sensors

Fingerprint, accelerometer, compass, gyro, proximity

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