Xiaomi Redmi K30 vs vivo S12

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA

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

HSDPA 850, 900, 2100; CDMA2000 1xEV-DO

HSDPA 850, 900, 1700(AWS), 2100; CDMA2000 1x
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, 3, 4, 5, 8, 28, 34, 38, 39, 40, 41
5G network

-

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
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Aluminium alloy, glass

Plastic, glass
SIM

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

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

165.3 mm

157.2 mm
Width

76.6 mm

72.4 mm
Thickness

8.8 mm

7.4/7.6 mm
Weight

208 g

179/181 g
Colors

Blue, Purple, Red

Black, Blue, Yellow

Display
Display type

IPS LCD capacitive touchscreen

AMOLED
Physical size

6.67 inches

6.44 inches
Resolution

1080 x 2400 pixels

1080 x 2400 pixels
Pixel density

395 ppi

409 ppi
Display colors

16777216

16777216
Protection

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

Scratch resistant, 2.5D curved glass screen
Multitouch

Yes

-
Display features

HDR10, 120Hz sampling rate

-

Main camera
Camera type

Quad

Triple
Main camera

64 MP, f/1.9 , 26 mm, 1/1.7" , 0.8 µm

108 MP, f/1.9 , 26 mm, 1/1.52" , (wide)
8 MP, f/2.2 , 13 mm, 1/4" , 1.12 µm

8 MP, f/2.2 , 16 mm, 1/4.0" , 1.12 µm, (ultrawide) , 120˚
2 MP, f/2.4 , 1/5" , 1.75 µm

2 MP, f/2.4 , (macro)
2 MP, f/2.4 , 1/5" , 1.75 µm
Primary camera resolution

9248 x 6944 pixels

12000 x 9000 pixels
Primary camera video

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

4K@30fps, 1080p@30fps, gyro-EIS
Primary camera flash

dual LED flash

dual-LED 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, digitam image stabilization, 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

Dual

Dual
Selfie camera

20 MP, f/2.2 , 27 mm, 1/3.4" , 0.8 µm

44 MP, f/2.0 , (wide)
2 MP, f/2.4 , 1/5" , 1.75 µm

8 MP, f/2.3 , (ultrawide) , 105˚
Selfie camera resolution

5963 x 3354 pixels

-
Selfie camera features

-

Face unlock, autofocus, HDR, face detection, panorama, geotagging, digital image stabilization
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
WLAN WiFi Hotspot

Yes

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

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD
Infrared

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

Features
Sensors

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

Accelerometer, compass, fingerprint, gyroscope, proximity