OnePlus 10 Pro vs Realme C21

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

GSM 850, 900, 1800, 1900
3G network

HSDPA 800, 850, 900, 1700(AWS), 1800, 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, 34, 38, 39, 40, 41 - China

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

5G band 1, 3, 40, 41, 78, 79 SA/NSA - China; SA/NSA/mmWave - USA

-
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

-
LTE speed

LTE-A (4CA), Cat18, 1200 Mbps download, 200 Mbps upload

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

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass Victus), glass back (Gorilla Glass), aluminum frame

Glass front, plastic back, plastic frame
SIM

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

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

163 mm

165.2 mm
Width

73.9 mm

76.4 mm
Thickness

8.6 mm

8.9 mm
Weight

200.5 g

190 g
Waterproof

IP68

-
Dust proof

IP68

-
Colors

Black, Green

Black, Blue

Display
Display type

LTPO2 AMOLED

IPS LCD
Physical size

6.7 inches

6.5 inches
Resolution

1440 x 3216 pixels

720 x 1600 pixels
Pixel density

525 ppi

270 ppi
Display colors

1073741824

16777216
Protection

Scratch resistant, Corning Gorilla Glass Victus

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

Always-on display, 120Hz, HDR10+, 500 nits (typ), 800 nits (HBM), 1300 nits (peak)

-

OS
OS

Android 12.1, ColorOS 12.1

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

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 48 MP, f/1.8 , 23 mm, 1/1.43" , 1.12 µm

(wide) , 13 MP, f/2.2 , 26 mm, 1/3.06" , 1.12 µm
(telephoto) , 8 MP, f/2.4 , 77 mm, 1.0 µm, 3.3x optical zoom

(macro) , 2 MP, f/2.4
150˚ , (ultrawide) , 50 MP, f/2.2 , 14 mm, 1/2.76" , 0.64 µm

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

8000 x 6000 pixels

2560 x 1920 pixels
Primary camera video

8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, Auto HDR, gyro-EIS

1080p@30fps
Primary camera flash

dual-LED dual-tone flash

LED flash
Camera features

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, macro-mode, phase detection autofocus, contrast detection autofocus, laser autofocus, Hasselblad Pro mode

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

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 32 MP, f/2.2 , 1/2.74" , 0.8 µm

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

6528 x 4896 pixels

2560 x 1920 pixels
Selfie camera features

Face unlock, HDR, digital image stabilization

Face unlock, HDR, panorama
Selfie camera video

8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, Auto HDR, gyro-EIS

1080p@30fps

Connectivity
WLAN

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

Wi-Fi 802.11b, 802.11g, 802.11n
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

-
WLAN WiFi Dual Band

Yes

-
USB

Type-C 3.1

microUSB 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

-
NFC

Yes

No
GPS

Yes, with dual-band A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

-
BDS

Yes

Yes