Asus Zenfone 9 vs vivo iQOO U3x

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800
3G network

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100

HSDPA 850, 900, 1700(AWS), 2100; CDMA2000 1x
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42 - A version; 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42 - B version; 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 28, 30, 34, 38, 39, 40, 41, 42, 66, 71 - C version

LTE frequency band 1, 3, 4, 5, 8, 28, 34, 38, 39, 40, 41
5G network

5G band 1, 2, 3, 5, 7, 8, 12, 20, 28, 38, 77, 78 - A version; 1, 2, 3, 5, 7, 8, 12, 20, 28, 38, 41, 77, 78 - B version; 1, 2, 3, 5, 7, 8, 12, 20, 25, 28, 38, 40, 41, 66, 71, 77, 78 - C version

5G band 1, 3, 28, 41, 77, 78 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

-

EV-DO Rev.A 3.1 Mbps download, 1.8 Mbps upload
LTE speed

LTE-A (5CA), Cat20, 2000 Mbps download, 211 Mbps upload

LTE-A, 800 Mbps download, 210 Mbps upload
5G speed

4.5 Gbps download, 0.9 Gbps upload

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass Victus), polymer back, aluminum frame

Plastic
SIM

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

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

146.5 mm

164.2 mm
Width

68.1 mm

75.4 mm
Thickness

9.1 mm

8.4 mm
Weight

169 g

185.5 g
Waterproof

IP68 (1.5m and 30 mins)

-
Dust proof

IP68

-
Colors

Black, Blue, Red, Silver

Aurora, Gray

Display
Display type

Super AMOLED

IPS LCD
Physical size

5.9 inches

6.58 inches
Resolution

1080 x 2400 pixels

1080 x 2408 pixels
Pixel density

445 ppi

401 ppi
Display colors

16777216

16777216
Protection

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

Scratch resistant, 2.5D curved glass screen
Display features

Always-on display, 120Hz, HDR10+, 1100 nits (peak)

90Hz

Main camera
Camera type

Dual

Dual
Main camera

(wide) , 50 MP, f/1.9 , 84˚ , 23.8 mm, 1/1.56" , 1.0 µm

(wide) , 13 MP, f/2.2 , 4x digital zoom
(ultrawide) , 12 MP, f/2.2 , 113˚ , 14.4 mm, 1/2.93" , 1.4 µm

(depth) , 2 MP, f/2.4
Primary camera resolution

8190 x 6120 pixels

4160 x 3120 pixels
Primary camera video

8K@24fps, 4K@30/60/120fps, 1080p@30/60/240fps, 720p@480fps; gyro-EIS, HDR

4K@30fps, 1080p@30fps
Primary camera flash

LED flash

LED flash
Camera features

Autofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus, laser autofocus, RAW

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 autofocus

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(standard) , 12 MP, f/2.5 , 27.5 mm, 1/2.93" , 1.22 µm

(wide) , 8 MP, f/2.0
Selfie camera resolution

4032 x 3024 pixels

3264 x 2448 pixels
Selfie camera features

Dual-pixel phase detection autofocus, face unlock, HDR

Face unlock
Selfie camera video

4K@30fps, 1080p@30/60fps

1080p@30fps

Connectivity
WLAN

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

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
WLAN DLNA

Yes

-
USB

Type-C 3.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.2

v5.1
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD, aptX Adaptive

aptX HD
NFC

Yes

No
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

-
NavIC

Yes

-