Xiaomi Redmi K30 5G vs vivo X90

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 1900, 2100

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

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

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

5G band 41(2500), 78(3500); Sub6

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

42 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A

LTE-A
5G speed

2+ Gbps download

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Aluminium alloy, glass

Glass front, glass back or eco leather back
SIM

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

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

165.3 mm

164.1 mm
Width

76.6 mm

74.4 mm
Thickness

8.8 mm

8.5 mm
Weight

208 g

196/200 g
Waterproof

-

IP64
Dust proof

-

IP64
Colors

Blue, Purple, Red, White

Black, Blue, Red

Display
Display type

IPS LCD capacitive touchscreen

AMOLED
Physical size

6.67 inches

6.78 inches
Resolution

1080 x 2400 pixels

1260 x 2800 pixels
Pixel density

395 ppi

453 ppi
Display colors

16777216

1073741824
Protection

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

Scratch resistant, 3D curved glass screen
Multitouch

Yes

-
Display features

HDR10, 120Hz sampling rate

120Hz, HDR10+

Hardware
CPU

Octa-core

Octa-core
CPU

Single-core 2.4 GHz Kryo 475 Prime

Single-core 3.05 GHz Cortex-X3
CPU(second)

Single-core 2.2 GHz Kryo 475 Gold

Triple-core 2.85 GHz Cortex-A715
CPU(third)

Hexa-core 1.8 GHz Kryo 475 Silver

Quad-core 1.8 GHz Cortex-A510
Chipset

Qualcomm SDM765 Snapdragon 765G

MediaTek Dimensity 9200
GPU

Adreno 620

Arm Immortalis-G715
Memory RAM

6, 8 GB

8, 12 GB
Internal storage

64, 128, 256 GB

128, 256, 512 GB
Memory card

microSD, microSDHC, microSDXC

No
Memory card max

256 GB

-
Storage

UFS 2.1

UFS 3.1, UFS 4.0

Main camera
Camera type

Quad

Triple
Main camera

64 MP, f/1.9 , 26 mm, 1/1.7" , 0.8 µm

50 MP, f/1.8 , 1/1.49" , 1.0 µm, (wide) , 10x digital zoom
8 MP, f/2.2 , 13 mm, 1/4" , 1.12 µm

12 MP, f/2.0 , 50 mm, 1/2.93" , 1.22 µm, (telephoto) , 2x optical zoom
2 MP, f/2.4 , 1/5" , 1.75 µm

12 MP, f/2.0 , 1/2.93" , 1.22 µm, 116˚ , (ultrawide) , 16 mm
2 MP, f/2.4 , 1/5" , 1.75 µm
Primary camera resolution

9248 x 6944 pixels

8190 x 6120 pixels
Primary camera video

2160p@30fps, 1080p@30/120fps, 720p@960fps

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

-

Zeiss optics
Primary camera flash

dual LED flash

dual-LED dual-tone flash
Camera features

Autofocus, continuous shooting, digital 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

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

Dual

Single
Selfie camera

20 MP, f/2.2 , 27 mm, 1/3.4" , 0.8 µm

32 MP, f/2.5 , 24 mm, 1/2.8" , 0.8 µm, (wide)
2 MP, f/2.4 , 1/5" , 1.75 µm
Selfie camera resolution

5963 x 3354 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, 802.11n 5Ghz, 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
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C reversible connector

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.1

v5.3
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD
Infrared

Yes

Yes
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
Beidou

Yes

-
BDS

-

Yes
QZSS

Yes

Yes
NavIC

-

Yes

Features
Sensors

Accelerometer, barometer, compass, geomagnetic, gravity, gyroscope, pedometer, proximity, light, side-mounted fingerprint sensor

Accelerometer, color spectrum, compass, fingerprint, gyroscope, proximity