Xiaomi Redmi Note 9T vs vivo Y21a

Xiaomi Redmi Note 9T

vivo Y21a

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, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 32, 38, 40, 41, 42

LTE frequency band 1, 3, 5, 8, 38, 40, 41
5G network

5G band 1, 3, 5, 7, 8, 20, 28, 38, 41, 77, 78, 79 SA/NSA/Sub6

-
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

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

LTE-A, Cat12, 603 Mbps download, 102 Mbps upload

LTE, 301 Mbps download, 151 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass 5), plastic 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

161.2 mm

164.3 mm
Width

77.3 mm

76.1 mm
Thickness

9.1 mm

8 mm
Weight

199 g

182 g
Colors

Black, Purple

Blue, Diamond Glow

Display
Display type

IPS LCD

IPS LCD
Physical size

6.53 inches

6.51 inches
Resolution

1080 x 2340 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

-
Display features

450 nits (typ)

-

Main camera
Camera type

Triple

Dual
Main camera

(wide) , 48 MP, f/1.8 , 26 mm, 1/2.0" , 0.8 µm

(wide) , 13 MP, f/2.2
(macro) , 2 MP, f/2.4

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

8000 x 6000 pixels

4160 x 3120 pixels
Primary camera video

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

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
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

-

Yes
Bluetooth

v5.1

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

Yes

-
NFC

Yes

No
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes