Realme C21 vs Xiaomi Poco F4

Realme C21

Xiaomi Poco F4

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 2100

HSDPA 850, 900, 1700(AWS), 1900, 2100
4G network

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

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 38, 40, 41
5G network

-

5G band 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

11.52 Mbps
LTE speed

LTE, Cat4, 150 Mbps download, 51 Mbps upload

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front, plastic back, plastic frame

Glass front (Gorilla Glass 5), glass back
SIM

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

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

165.2 mm

163.2 mm
Width

76.4 mm

76 mm
Thickness

8.9 mm

7.7 mm
Weight

190 g

195 g
Splash resistant

-

IP53
Dust proof

-

IP53
Colors

Black, Blue

Black, Green, Silver

Display
Display type

IPS LCD

AMOLED
Physical size

6.5 inches

6.67 inches
Resolution

720 x 1600 pixels

1080 x 2400 pixels
Pixel density

270 ppi

395 ppi
Display colors

16777216

1073741824
Protection

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

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5
Display features

-

120Hz, HDR10+, Dolby Vision, 900 nits (HBM), 1300 nits (peak)

OS
OS

Android 10, Realme UI 1.0 / Android 11, Realme UI 2.0

Android 12, MIUI 13 for POCO

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 13 MP, f/2.2 , 26 mm, 1/3.06" , 1.12 µm

(wide) , 64 MP, f/1.8 , 1/2.0" , 0.7 µm
(macro) , 2 MP, f/2.4

(ultrawide) , 8 MP, f/2.2 , 119˚ , 1/4.0" , 1.12 µm
(depth) , 2 MP, f/2.4

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

2560 x 1920 pixels

9280 x 6920 pixels
Primary camera video

1080p@30fps

4K@30/60fps, 1080p@30/60fps
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, phase detection autofocus

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

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 5 MP, f/2.2 , 1/5.0" , 1.12 µm

(wide) , 20 MP, f/2.5 , 1/3.06" , 0.8 µm
Selfie camera resolution

2560 x 1920 pixels

-
Selfie camera features

Face unlock, HDR, panorama

Face unlock, HDR
Selfie camera video

1080p@30fps

1080p@30fps

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

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

Yes

Yes
WLAN WiFi Direct

-

Yes
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

-

Yes
NFC

No

Yes (market dependent)
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

-

Yes
BDS

Yes

Yes
QZSS

-

Yes
NavIC

-

Yes