Xiaomi Redmi Note 9S vs vivo Y21G

Xiaomi Redmi Note 9S

vivo Y21G

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

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

HSDPA 850, 900, 2100
4G network

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 28(700), 38(2600), 40(2300)

LTE frequency band 1, 3, 5, 8, 38, 40, 41
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

3.1 Mbps download, 1.8 Mbps upload

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

LTE, Cat12, 603 Mbps download, 102 Mbps upload

LTE, Cat4, 150 Mbps download, 51 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front, glass back, plastic frame

Glass front, plastic frame, plastic back
SIM

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

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

165.8 mm

164.3 mm
Width

76.7 mm

76.1 mm
Thickness

8.8 mm

8 mm
Weight

209 g

182 g
Splash resistant

Yes

-
Colors

Black, Gray, White

Blue, Diamond Glow

Display
Display type

IPS LCD capacitive touchscreen

IPS LCD
Physical size

6.67 inches

6.51 inches
Resolution

1080 x 2400 pixels

720 x 1600 pixels
Pixel density

395 ppi

270 ppi
Display colors

16777216

16777216
Protection

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

-
Multitouch

Yes

-
Display features

450 nits typ. brightness

-

Main camera
Camera type

Quad

Dual
Main camera

48 MP, f/1.8 , 26 mm, 1/2.0" , 0.8 µm

13 MP, f/2.2 , (wide)
8 MP, f/2.2 , 13 mm, 1/4.0" , 1.12 µm

2 MP, f/2.4 , (macro)
5 MP, f/2.4 , 1.12 µm
2 MP, f/2.4
Primary camera resolution

8000 x 6000 pixels

4160 x 3120 pixels
Primary camera video

2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS

1080p@30fps
Primary camera flash

LED flash

LED 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, macro mode, phase detection autofocus

Autofocus, continuous shooting, digital zoom, digital 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

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 1.0 reversible connector

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth HID

Yes

-
bluetooth LE

Yes

Yes
Bluetooth EDR

Yes

-
Infrared

Yes

-
NFC

Yes

No
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
Beidou

Yes

-
BDS

-

Yes