Xiaomi Redmi 9 vs vivo X90

Network
2G network

GSM 850, 900, 1800, 1900

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

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

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41
5G network

-

5G band 1, 3, 5, 8, 28, 41, 77, 78 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass 3), plastic back, plastic frame

Glass front, glass back or eco leather back
SIM

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

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

163.3 mm

164.1 mm
Width

77 mm

74.4 mm
Thickness

9.1 mm

8.5 mm
Weight

198 g

196/200 g
Waterproof

-

IP64
Dust proof

-

IP64
Colors

Blue/Pink, Gray, Green, Purple

Black, Blue, Red

Display
Display type

IPS LCD capacitive touchscreen

AMOLED
Physical size

6.53 inches

6.78 inches
Resolution

1080 x 2340 pixels

1260 x 2800 pixels
Pixel density

395 ppi

453 ppi
Display colors

16777216

1073741824
Protection

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 3

Scratch resistant, 3D curved glass screen
Display features

-

120Hz, HDR10+

Main camera
Camera type

Quad

Triple
Main camera

13 MP, f/2.2 , 28 mm, 1/3.1" , 1.12 µm

50 MP, f/1.8 , 1/1.49" , 1.0 µm, (wide) , 10x digital zoom
8 MP, f/2.2 , 1/4.0" , 1.12 µm

12 MP, f/2.0 , 1/2.93" , 1.22 µm, (telephoto) , 50 mm, 2x optical zoom
5 MP, f/2.4

12 MP, f/2.0 , 116˚ , (ultrawide) , 16 mm, 1/2.93" , 1.22 µm
2 MP, f/2.4
Primary camera resolution

4160 x 3120 pixels

8190 x 6120 pixels
Primary camera video

1080p@30fps

4K@30/60fps, 1080p@30/60fps, gyro-EIS
Primary camera optics

-

Zeiss optics
Primary camera flash

LED flash

dual-LED dual-tone flash
Camera features

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

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, phase detection autofocus, laser autofocus

Selfie camera
Selfie camera type

-

Single
Selfie camera

8 MP, f/2.0 , 28 mm

32 MP, f/2.5 , 24 mm, (wide) , 1/2.8" , 0.8 µm
Selfie camera resolution

3264 x 2448 pixels

6528 x 4896 pixels
Selfie camera features

-

Face unlock
Selfie camera video

1080p@30fps

4K@30fps, 1080p@30fps

Connectivity
WLAN

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

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

Yes

-
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

-

Yes
USB

Type-C 1.0 reversible connector

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.3
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD
Infrared

Yes

Yes
NFC

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

-

Yes
Beidou

Yes

-
BDS

-

Yes
QZSS

-

Yes
NavIC

-

Yes